Patent Application
20220412745
One of the most important technical tasks of an autonomous vehicle is to determine its location in the environment.
The autonomous vehicle includes one or more vehicle cameras that have an optical axis that is horizontal or almost horizontal.
Various prior art solutions generate maps based on visual information acquired by vehicle cameras (having the same horizontal or almost horizontal field of view) of other vehicles that drive over multiple regions.
Accordingly—the generation of the maps is time and resource consuming.
There is a need to generate maps in a more cost effective manner.
The embodiments of the disclosure will be understood and appreciated more fully from the following detailed description, taken in conjunction with the drawings in which:
In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the present invention.
The subject matter regarded as the invention is particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, both as to organization and method of operation, together with objects, features, and advantages thereof, may best be understood by reference to the following detailed description when read with the accompanying drawings.
It will be appreciated that for simplicity and clarity of illustration, elements shown in the figures have not necessarily been drawn to scale. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity. Further, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements.
Because the illustrated embodiments of the present invention may for the most part, be implemented using electronic components and circuits known to those skilled in the art, details will not be explained in any greater extent than that considered necessary as illustrated above, for the understanding and appreciation of the underlying concepts of the present invention and in order not to obfuscate or distract from the teachings of the present invention.
Any reference in the specification to a method should be applied mutatis mutandis to a device or system capable of executing the method and/or to a non-transitory computer readable medium that stores instructions for executing the method.
Any reference in the specification to a system or device should be applied mutatis mutandis to a method that may be executed by the system, and/or may be applied mutatis mutandis to non-transitory computer readable medium that stores instructions executable by the system.
Any reference in the specification to a non-transitory computer readable medium should be applied mutatis mutandis to a device or system capable of executing instructions stored in the non-transitory computer readable medium and/or may be applied mutatis mutandis to a method for executing the instructions.
Any combination of any module or unit listed in any of the figures, any part of the specification and/or any claims may be provided.
Any one of the perception unit, narrow AI agents, intersection related driving decision unit may be implemented in hardware and/or code, instructions and/or commands stored in a non-transitory computer readable medium, may be included in a vehicle, outside a vehicle, in a mobile device, in a server, and the like.
The vehicle may be any type of vehicle that a ground transportation vehicle, an airborne vehicle, and a water vessel.
The specification and/or drawings may refer to a processor. The processor may be a processing circuitry. The processing circuitry may be implemented as a central processing unit (CPU), and/or one or more other integrated circuits such as application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), full-custom integrated circuits, etc., or a combination of such integrated circuits.
Any combination of any steps of any method illustrated in the specification and/or drawings may be provided.
Aerial images may be acquired by any aerial unit such as a drone, an airplane, a satellite, and the like.
It is more cost effective to obtain aerial images—and in some cases these images are much more accurate than images acquired by vehicle sensors—as they are taken by cameras that have an optical axis that may be normal or otherwise exceed the horizontal or almost horizontal optical axis of the vehicle cameras.
Aerial images may be processed to generate aerial generated maps of various regions of areas—the mas may cover a country, a county, a city, a neighborhood, and the like.
In order to utilize aerial maps there is a need to compensate for the different information that appear in aerial acquired images and vehicle camera acquired images.
The compensation may be based on object detection and an initial estimate of the location of a vehicle—which may be provided by GPS systems and the like.
The initial estimate of the location of the vehicle has a certain accuracy—and therefore defines an estimated region (for example—a certain box) in which the vehicle is located.
The fine/accurate/high resolution/determination of the location of the autonomous vehicle is made by (a) obtaining, from the aerial map (at least a part that corresponds to the estimated region), the locations and identities of objects within the estimated region, (b) determining by processing images (or other sensed information) sensed by the vehicle camera (or other sensor) the location (in relation to the vehicle) of one or more objects within the environment of the vehicle, (c) and determining the location of the vehicle based on the information from (a) and (b).
For example—assuming that there is a unique object as a certain location within the part of the aerial map that describes the estimated region, and that the vehicle determines (based on vehicle sensed information) that the vehicle is located at a certain distance from that unique object and at a certain angle from that unique object—then the location of the vehicle can be determined to be at a certain distance and at a certain angle from the certain location (of the unique object). An example with a unique object (anchor) that is a roundabout 220 is shown in
The processor may perform steps (a)-(c).
The initial estimate of the location of the vehicle has a certain accuracy—and therefore defines an estimated region (for example—a certain box) in which the vehicle is located.
Method 100 may be executed by a processor. Method 100 may be executed by a processor and one or more sensors. The processor may belong to a vehicle computer, to a remote computer such as a cloud server, and the like.
Method 100 provide an accurate method for determining the location of the vehicle. The method may be executed in real time and may save computational and/or memory resources as it obliviate the need to use an expensive and accurate location information, and may use a predefined a mapping between bird's eye information and the vehicle sensed environment information. The mapping may be updated and/or generated over time.
Using an aerial map may be especially beneficial in cases where the vehicle does not have detailed (non-aerial) maps—for example when the vehicle has to relay on a communication link for continuously receiving detailed maps of the aeras in which the vehicle is located—or in cases that the vehicle does not have (permanently or temporarily) resources for generating and/or storing detained maps.
Method 100 may start by steps 110 and 120.
Step 110 may include determining a first vehicle location estimate based on a location sensor information. The location sensor information may be generated by a location sensor that may be a global positioning system (GPS) sensor, a wireless network based location sensor that may estimate the location using locations of base stations, the identity of a cell in which the vehicle is located, and the like.
Step 120 may include obtaining vehicle sensed environment information that includes vehicle sensed visual information. The vehicle sensed information may include other types of information—for example audio sensed environment information, radar sensed spatial information, infrared sensed environment information.
Vehicle sensed environment information is sensed information regarding the environment of the vehicle. The environment is, at least in part, located in front of the vehicle—but may include locations to the rear of the vehicle and/or the sides of the vehicle. The environment may span between a few centimeters to the vehicle to tens of meters, hundred meters or even more—from the vehicle.
Step 120 may be followed by step 130 of detecting spatial relationships between the vehicle and objects of the group of objects that are captured by the vehicle sensed environment information.
Step 130 may include detecting the objects using a machine learning process that was trained in an unsupervised manner or in a supervised manner. The objects may be or may include one or more anchors. An anchor is an object that is expected to appear in the aerial information and may be at least locally unique. For example—a pedestrian crossing, a traffic light, a traffic signs, and the like.
Step 130 may include detecting the horizon and performing surface estimations.
Steps 130 may be followed by step 140 of obtaining bird's eye based location information (aerial information) of the objects of the group of objects. The aerial information may relate to an area in which the vehicle is located. Thus—the aerial information may represent a segment of a larger aerial map.
Step 140 may use the first vehicle location estimate generated during step 110 to fetch or search within bird's eye based location information of objects within the environment of the vehicle.
Step 140 may be followed by step 150 of determining a second vehicle location estimate that is based on the spatial relationships and the bird's eye based location information. The second vehicle location estimate is more accurate than the first vehicle location estimate.
Step 150 may utilize a mapping between the bird's eye visual information and the vehicle sensed environment information.
The mapping may be executed by another machine learning process that is trained in an unsupervised manner or in a supervised manner.
The mapping may be generated over time—while the vehicle obtained more aerial information and sensed more sensed environmental information.
Signatures of the vehicle sensed environmental information may be generated and concept structures that include signatures and metadata may be generated. The metadata may be or may include aerial information metadata that identifies objects captured in the vehicle sensed environmental information. For example—assuming that the aerial map includes information regarding a traffic light located at the vicinity of a vehicle, and that the vehicle identifies that traffic light. A signature of the traffic light is compared to signatures related to concept structures (may be one or more concept structure signature or one or more object signatures of the concept structure)—and if there is a match—the concept structure may be labeled as a traffic light concept structure.
The mapping is required in order to link an object captured in the visual information to its bird's eye location.
As the spatial distance between the vehicle and that object is known (or at least be estimated) from step 130—then an estimate of the location of the vehicle can be deducted from the bird's eye location of the object and the spatial location to the object.
The vehicle sensed information may explicitly include depth (distance) information. For example—the vehicle sensed information may include radar information, LIDAR obtained depth information, ultrasonic or acoustic based audio depth information, and the like.
In this case—step 130 may include detecting the spatial relationship by include fusing the vehicle sensed visual information with the vehicle sensed depth information. For example—when using a radar—the radar provides an accurate distance information that can be used to identify (along with the visual information) the objects that may be relevant to steps 130, 140 and 150. The machine learning process that participates in the execution of step 130 may or may not execute the fusion.
It should be noted that the vehicle sensed information or may not explicitly include depth information
In order to provide a high accuracy vehicle location estimate it is beneficial to use information about three or more objects—especially three or more objects located at different direction in relation to the vehicle.
The objects of the group may be static objects of known bird's eye locations. Static means that they are not expected to change their location in relation to their bird's eye location.
Step 150 may include virtually “overlaying” the objects and the spatial relationships within a bird's eye virtual plane.
The object may be at least one out of a traffic light, a traffic sign, a lane boundary, a road mark, or a lane line.
Step 150 may be followed by step 160 of determining, based on the vehicle sensed information, on the second vehicle location estimate, and on aerial information regarding the environment of the vehicle, to perform driving related operation within at least the environment of the vehicle.
The determining may be based on at least one out of:
The driving related operation may include autonomously driving the vehicle or performing an advance driver assistance system (ADAS) operation. An ADAS operation may include planning and suggesting to the human driver one or more future paths with the environment, controlling some aspects of the driving, and the like. Examples of ADAS operation may include pedestrian avoidance, collision avoidance, collision warnings, lane departure warning, automatic emergency breaking, parking assisting, and the like.
Step 160 may be followed by step 170 of performing the driving related operation. This may include performing an autonomous driving operation and/or an advance driver assistance system (ADAS) operation.
Method 100 may also include step 180 of performing one or more vehicle local map operation. This may include at least one out of:
The sending or sharing may use any communication means—for example vehicle to vehicle
The vehicle local map is indicative of anchors (for example anchor type—traffic light, building, and the like) within the environment of the vehicle and locations of anchors. The local vehicle map may also include sensed information—for example visual information of the anchors, and the like. The local vehicle map may include 2D or 3D information—for example coordinates, point clouds, 3D sensed information, processed 3D sensed information, and the like.
The vehicle may generate different vehicle local maps for different locations.
The one or more vehicle local maps may be of the same resolution but may differ from resolution, may be of the same size of may be of difference sized, may be compressed or uncompressed, and the like.
The term local means that the vehicle local map may cover the environment of the vehicle and may be a limited size (for example 100, 200, 300, 500, 750, 1000, 1500, 2000, 5000, 7500, 10000 square meters, and the like). The method according to claim 3 comprising sharing the vehicle local map with another computerized system located outside the vehicle.
It should be noted that method 100 may be include various combinations of steps 110, 120, 130, 140, 150, 160, 170 and 180. For example—step 180 may be executed instead of (or in addition to) the execution of steps 160 and 167.
Method 300 may start by step 120 of obtaining vehicle sensed environment information by at least one sensor of a vehicle.
Method 300 may also include step 320 of determining, by an initial location estimate module of the vehicle, an initial location estimate of the vehicle. Step 320 may include step 110 and/or step 130.
Step 320 may be followed by step 330 of obtaining, by processor of the vehicle, aerial map segment information related to a segment of an aerial map, the segment includes an environment of the initial location estimate of the vehicle. Step 320 may include step 140.
Steps 330 and 310 may be followed by step 340 of determining, based on the vehicle sensed information and on the aerial map segment information, to perform the driving related operation within at least the environment of the initial location estimate of the vehicle. Step 340 may include step 350. Step 340 may be preceded by executing step 150.
Step 340 may be followed by step 170 of performing the driving related operation. This may include performing an autonomous driving operation and/or an advance driver assistance system (ADAS) operation.
Method 300 may also include step 180 of performing one or more vehicle local map operation.
It should be noted that method 300 may be include various combinations of steps 310, 120, 330, 340, 170 and 180. For example—step 180 may be executed instead of (or in addition to) the execution of steps 340 and 170.
The vehicle 210 may calculate a first vehicle location estimate that exhibits a certain uncertainty—and this certain uncertainty is also reflected by an uncertainty about the exact location of the object 20—see the dashed circle 12 around the vehicle and dashed circle 22 around the object 20.
Method 500 may start by steps 510 and 520.
Step 510 may include obtaining vehicle sensed environment information by at least one sensor of a vehicle.
Step 520 may include determining, by an initial location estimate module of the vehicle, an initial location estimate of the vehicle.
Steps 510 and 520 may be followed by step 530 of obtaining, by processor of a vehicle, one or more local vehicle maps, the one or more local vehicle maps are generated based on a mapping between one or more aerial maps accessible to one or more other vehicles and sensed information of one or more environments of the one or more other vehicle. The obtaining may include obtaining a vehicle local map that includes the initial location estimate.
The vehicle may obtain a local vehicle map when reaching a location that is included in the local vehicle map. Alternatively—the vehicle can obtain one or more local vehicle maps in advance—before reaching one or more locations include din the one or more local vehicle maps.
Step 530 may be followed by step 540 of determining, based on the vehicle sensed information and on the one or more local vehicle maps, to perform a driving related operation within at least the environment of the initial location estimate of the vehicle.
The determining may be based on at least one out of:
Step 540 may be followed by step 170 of performing the driving related operation.
Any combination of any steps of methods 100, 300, 500, 5000 and any other methods illustrated in any of the figures may be provided.
Various example of generating signatures, processing sensed information and clustering are provided below. These methods and/or systems may be applied in any of the mentioned above methods.
The analysis of content of a media unit may be executed by generating a signature of the media unit and by comparing the signature to reference signatures. The reference signatures may be arranged in one or more concept structures or may be arranged in any other manner. The signatures may be used for object detection or for any other use.
The signature may be generated by creating a multidimensional representation of the media unit. The multidimensional representation of the media unit may have a very large number of dimensions. The high number of dimensions may guarantee that the multidimensional representation of different media units that include different objects is sparse—and that object identifiers of different objects are distant from each other—thus improving the robustness of the signatures.
The generation of the signature is executed in an iterative manner that includes multiple iterations, each iteration may include an expansion operations that is followed by a merge operation. The expansion operation of an iteration is performed by spanning elements of that iteration. By determining, per iteration, which spanning elements (of that iteration) are relevant—and reducing the power consumption of irrelevant spanning elements—a significant amount of power may be saved.
In many cases, most of the spanning elements of an iteration are irrelevant—thus after determining (by the spanning elements) their relevancy—the spanning elements that are deemed to be irrelevant may be shut down a/or enter an idle mode.
Method 5000 may start by step 5010 of receiving or generating sensed information.
The sensed information may be a media unit of multiple objects.
Step 5010 may be followed by processing the media unit by performing multiple iterations, wherein at least some of the multiple iterations comprises applying, by spanning elements of the iteration, dimension expansion process that are followed by a merge operation.
The processing may include:
The output of step 5020 is a k′th iteration expansion results 5120.
The output of step 5030 is a k′th iteration merge results 5130.
For each iteration (except the first iteration)—the merge result of the previous iteration is an input to the current iteration expansion process.
At least some of the K iterations involve selectively reducing the power consumption of some spanning elements (during step 5020) that are deemed to be irrelevant.
The image 6001 is virtually segments to segments 6000(i,k). The segments may be of the same shape and size but this is not necessarily so.
Outcome 6013 may be a tensor that includes a vector of values per each segment of the media unit. One or more objects may appear in a certain segment. For each object—an object identifier (of the signature) points to locations of significant values, within a certain vector associated with the certain segment.
For example—a top left segment (6001(1,1)) of the image may be represented in the outcome 6013 by a vector V(1,1) 6017(1,1) that has multiple values. The number of values per vector may exceed 100, 200, 500, 1000, and the like.
The significant values (for example—more than 10, 20, 30, 40 values, and/or more than 0.1%, 0.2%. 0.5%, 1%, 5% of all values of the vector and the like) may be selected. The significant values may have the values- but may be selected in any other manner.
The image signature 6027 includes five indexes for the retrieval of the five significant values—first till fifth identifiers ID1-ID5 are indexes for retrieving the first till fifth significant values.
The k′th iteration expansion process start by receiving the merge results 5060′ of a previous iteration.
The merge results of a previous iteration may include values are indicative of previous expansion processes—for example—may include values that are indicative of relevant spanning elements from a previous expansion operation, values indicative of relevant regions of interest in a multidimensional representation of the merge results of a previous iteration.
The merge results (of the previous iteration) are fed to spanning elements such as spanning elements 5061(1)-5061(J).
Each spanning element is associated with a unique set of values. The set may include one or more values. The spanning elements apply different functions that may be orthogonal to each other. Using non-orthogonal functions may increase the number of spanning elements—but this increment may be tolerable.
The spanning elements may apply functions that are decorrelated to each other—even if not orthogonal to each other.
The spanning elements may be associated with different combinations of object identifiers that may “cover” multiple possible media units. Candidates for combinations of object identifiers may be selected in various manners—for example based on their occurrence in various images (such as test images) randomly, pseudo randomly, according to some rules and the like. Out of these candidates the combinations may be selected to be decorrelated, to cover said multiple possible media units and/or in a manner that certain objects are mapped to the same spanning elements.
Each spanning element compares the values of the merge results to the unique set (associated with the spanning element) and if there is a match—then the spanning element is deemed to be relevant. If so—the spanning element completes the expansion operation.
If there is no match—the spanning element is deemed to be irrelevant and enters a low power mode. The low power mode may also be referred to as an idle mode, a standby mode, and the like. The low power mode is termed low power because the power consumption of an irrelevant spanning element is lower than the power consumption of a relevant spanning element.
In
Each relevant spanning element may perform a spanning operation that includes assigning an output value that is indicative of an identity of the relevant spanning elements of the iteration. The output value may also be indicative of identities of previous relevant spanning elements (from previous iterations).
For example—assuming that spanning element number fifty is relevant and is associated with a unique set of values of eight and four—then the output value may reflect the numbers fifty, four and eight—for example one thousand multiplied by (fifty+forty) plus forty. Any other mapping function may be applied.
A merge operation may include finding regions of interest. The regions of interest are regions within a multidimensional representation of the sensed information. A region of interest may exhibit a more significant response (for example a stronger, higher intensity response).
The merge operation (executed during a k′th iteration merge operation) may include at least one of the following:
The same merge operations may applied in different iterations.
Alternatively, different merge operations may be executed during different iterations.
The hybrid process is hybrid in the sense that some expansion and merge operations are executed by a convolutional neural network (CNN) and some expansion and merge operations (denoted additional iterations of expansion and merge) are not executed by the CNN—but rather by a process that may include determining a relevancy of spanning elements and entering irrelevant spanning elements to a low power mode.
In
The output of these layers provided information about image properties. The image properties may not amount to object detection. Image properties may include location of edges, properties of curves, and the like.
The CNN may include additional layers (for example third till N′th layer 6010(N)) that may provide a CNN output 6018 that may include object detection information. It should be noted that the additional layers may not be included.
It should be noted that executing the entire signature generation process by a hardware CNN of fixed connectivity may have a higher power consumption—as the CNN will not be able to reduce the power consumption of irrelevant nodes.
Method 7000 starts by step 7010 of receiving or generating a media unit of multiple objects.
Step 7010 may be followed by step 7012 of processing the media unit by performing multiple iterations, wherein at least some of the multiple iterations comprises applying, by spanning elements of the iteration, dimension expansion process that are followed by a merge operation.
The applying of the dimension expansion process of an iteration may include (a) determining a relevancy of the spanning elements of the iteration; and (b) completing the dimension expansion process by relevant spanning elements of the iteration and reducing a power consumption of irrelevant spanning elements until, at least, a completion of the applying of the dimension expansion process.
The identifiers may be retrieval information for retrieving the significant portions.
The at least some of the multiple iterations may be a majority of the multiple iterations.
The output of the multiple iteration may include multiple property attributes for each segment out of multiple segments of the media unit; and wherein the significant portions of an output of the multiple iterations may include more impactful property attributes.
The first iteration of the multiple iteration may include applying the dimension expansion process by applying different filters on the media unit.
The at least some of the multiple iteration exclude at least a first iteration of the multiple iterations. See, for example,
The determining the relevancy of the spanning elements of the iteration may be based on at least some identities of relevant spanning elements of at least one previous iteration.
The determining the relevancy of the spanning elements of the iteration may be based on at least some identities of relevant spanning elements of at least one previous iteration that preceded the iteration.
The determining the relevancy of the spanning elements of the iteration may be based on properties of the media unit.
The determining the relevancy of the spanning elements of the iteration may be performed by the spanning elements of the iteration.
Method 7000 may include a neural network processing operation that may be executed by one or more layers of a neural network and does not belong to the at least some of the multiple iterations. See, for example,
The at least one iteration may be executed without reducing power consumption of irrelevant neurons of the one or more layers.
The one or more layers may output information about properties of the media unit, wherein the information differs from a recognition of the multiple objects.
The applying, by spanning elements of an iteration that differs from the first iteration, the dimension expansion process may include assigning output values that may be indicative of an identity of the relevant spanning elements of the iteration. See, for example,
The applying, by spanning elements of an iteration that differs from the first iteration, the dimension expansion process may include assigning output values that may be indicative a history of dimension expansion processes until the iteration that differs from the first iteration.
The each spanning element may be associated with a subset of reference identifiers. The determining of the relevancy of each spanning elements of the iteration may be based a relationship between the subset of the reference identifiers of the spanning element and an output of a last merge operation before the iteration.
The output of a dimension expansion process of an iteration may be a multidimensional representation of the media unit that may include media unit regions of interest that may be associated with one or more expansion processes that generated the regions of interest.
The merge operation of the iteration may include selecting a subgroup of media unit regions of interest based on a spatial relationship between the subgroup of multidimensional regions of interest.
Method 7000 may include applying a merge function on the subgroup of multidimensional regions of interest. See, for example,
Method 7000 may include applying an intersection function on the subgroup of multidimensional regions of interest. See, for example,
The merge operation of the iteration may be based on an actual size of one or more multidimensional regions of interest.
The merge operation of the iteration may be based on relationship between sizes of the multidimensional regions of interest. For example—larger multidimensional regions of interest may be maintained while smaller multidimensional regions of interest may be ignored of
The merge operation of the iteration may be based on changes of the media unit regions of interest during at least the iteration and one or more previous iteration.
Step 7012 may be followed by step 7014 of determining identifiers that are associated with significant portions of an output of the multiple iterations.
Step 7014 may be followed by step 7016 of providing a signature that comprises the identifiers and represents the multiple objects.
Any of the mentioned above signature generation method provides a signature that does not explicitly includes accurate shape information. This adds to the robustness of the signature to shape related inaccuracies or to other shape related parameters.
The signature includes identifiers for identifying media regions of interest.
Each media region of interest may represent an object (for example a vehicle, a pedestrian, a road element, a human made structure, wearables, shoes, a natural element such as a tree, the sky, the sun, and the like) or a part of an object (for example—in the case of the pedestrian—a neck, a head, an arm, a leg, a thigh, a hip, a foot, an upper arm, a forearm, a wrist, and a hand). It should be noted that for object detection purposes a part of an object may be regarded as an object.
The exact shape of the object may be of interest.
Method 7002 may include a sequence of steps 7020, 7022, 7024 and 7026.
Step 7020 may include receiving or generating the media unit.
Step 7022 may include processing the media unit by performing multiple iterations, wherein at least some of the multiple iterations comprises applying, by spanning elements of the iteration, dimension expansion process that are followed by a merge operation.
Step 7024 may include selecting, based on an output of the multiple iterations, media unit regions of interest that contributed to the output of the multiple iterations.
Step 7026 may include providing a hybrid representation, wherein the hybrid representation may include (a) shape information regarding shapes of the media unit regions of interest, and (b) a media unit signature that includes identifiers that identify the media unit regions of interest.
Step 7024 may include selecting the media regions of interest per segment out of multiple segments of the media unit. See, for example,
Step 7026 may include step 7027 of generating the shape information.
The shape information may include polygons that represent shapes that substantially bound the media unit regions of interest. These polygons may be of a high degree.
In order to save storage space, the method may include step 7028 of compressing the shape information of the media unit to provide compressed shape information of the media unit.
Method 5002 may start by step 5011 of receiving or generating a media unit.
Step 5011 may be followed by processing the media unit by performing multiple iterations, wherein at least some of the multiple iterations comprises applying, by spanning elements of the iteration, dimension expansion process that are followed by a merge operation.
The processing may be followed by steps 5060 and 5062.
The processing may include steps 5020, 5030, 5040 and 5050.
Step 5020 may include performing a k′th iteration expansion process (k may be a variable that is used to track the number of iterations).
Step 5030 may include performing a k′th iteration merge process.
Step 5040 may include changing the value of k.
Step 5050 may include checking if all required iterations were done—if so proceeding to steps 5060 and 5062. Else—jumping to step 5020.
The output of step 5020 is a k′th iteration expansion result.
The output of step 5030 is a k′th iteration merge result.
For each iteration (except the first iteration)—the merge result of the previous iteration is an input to the current iteration expansion process.
Step 5060 may include completing the generation of the signature.
Step 5062 may include generating shape information regarding shapes of media unit regions of interest. The signature and the shape information provide a hybrid representation of the media unit.
The combination of steps 5060 and 5062 amounts to a providing a hybrid representation, wherein the hybrid representation may include (a) shape information regarding shapes of the media unit regions of interest, and (b) a media unit signature that includes identifiers that identify the media unit regions of interest.
Object detection may include comparing a signature of an input image to signatures of one or more cluster structures in order to find one or more cluster structures that include one or more matching signatures that match the signature of the input image.
The number of input images that are compared to the cluster structures may well exceed the number of signatures of the cluster structures. For example—thousands, tens of thousands, hundreds of thousands (and even more) of input signature may be compared to much less cluster structure signatures. The ratio between the number of input images to the aggregate number of signatures of all the cluster structures may exceed ten, one hundred, one thousand, and the like.
In order to save computational resources, the shape information of the input images may be compressed.
On the other hand—the shape information of signatures that belong to the cluster structures may be uncompressed—and of higher accuracy than those of the compressed shape information.
When the higher quality is not required—the shape information of the cluster signature may also be compressed.
Compression of the shape information of cluster signatures may be based on a priority of the cluster signature, a popularity of matches to the cluster signatures, and the like.
The shape information related to an input image that matches one or more of the cluster structures may be calculated based on shape information related to matching signatures.
For example—a shape information regarding a certain identifier within the signature of the input image may be determined based on shape information related to the certain identifiers within the matching signatures.
Any operation on the shape information related to the certain identifiers within the matching signatures may be applied in order to determine the (higher accuracy) shape information of a region of interest of the input image identified by the certain identifier.
For example—the shapes may be virtually overlaid on each other and the population per pixel may define the shape.
For example—only pixels that appear in at least a majority of the overlaid shaped should be regarded as belonging to the region of interest.
Other operations may include smoothing the overlaid shapes, selecting pixels that appear in all overlaid shapes.
The compressed shape information may be ignored of or be taken into account.
It is assumed that there are multiple (M) cluster structures 4974(1)-4974(M). Each cluster structure includes cluster signatures, metadata regarding the cluster signatures, and shape information regarding the regions of interest identified by identifiers of the cluster signatures.
For example—first cluster structure 4974(1) includes multiple (N1) signatures (referred to as cluster signatures CS) CS(1,1)-CS(1,N1) 4975(1,1)-4975(1,N1), metadata 4976(1), and shape information (Shapeinfo 4977(1)) regarding shapes of regions of interest associated with identifiers of the CSs.
Yet for another example—M′th cluster structure 4974(M) includes multiple (N2) signatures (referred to as cluster signatures CS) CS(M,1)-CS(M,N2) 4975(M,1)-4975(M,N2), metadata 4976(M), and shape information (Shapeinfo 4977(M)) regarding shapes of regions of interest associated with identifiers of the CSs.
The number of signatures per concept structure may change over time—for example due to cluster reduction attempts during which a CS is removed from the structure to provide a reduced cluster structure, the reduced structure is checked to determine that the reduced cluster signature may still identify objects that were associated with the (non-reduced) cluster signature—and if so the signature may be reduced from the cluster signature.
The signatures of each cluster structures are associated to each other, wherein the association may be based on similarity of signatures and/or based on association between metadata of the signatures.
Assuming that each cluster structure is associated with a unique object—then objects of a media unit may be identified by finding cluster structures that are associated with said objects. The finding of the matching cluster structures may include comparing a signature of the media unit to signatures of the cluster structures—and searching for one or more matching signature out of the cluster signatures.
In
The media unit signature 4972 is compared to the signatures of the M cluster structures—from CS(1,1) 4975(1,1) till CS(M,N2) 4975(M,N2).
We assume that one or more cluster structures are matching cluster structures.
Once the matching cluster structures are found the method proceeds by generating shape information that is of higher accuracy then the compressed shape information.
The generation of the shape information is done per identifier.
For each j that ranges between 1 and J (J is the number of identifiers per the media unit signature 4972) the method may perform the steps of:
For example—assuming that the matching signatures include CS(1,1) 2975(1,1), CS(2,5) 2975(2,5), CS(7,3) 2975(7,3) and CS(15,2) 2975(15,2), and that the j′th identifier is included in CS(1,1) 2975(1,1), CS(7,3) 2975(7,3) and CS(15,2) 2975(15,2)—then the shape information of the j′th identifier of the media unit is determined based on the shape information associated with CS(1,1) 2975(1,1), CS(7,3) 2975(7,3) and CS(15,2) 2975(15,2).
The shapes of the four regions of interest 8001, 8002, 8003 and 8004 are four polygons. Accurate shape information regarding the shapes of these regions of interest may be generated during the generation of signature 8010.
Method 8030 may include the steps of method 8020 or may be preceded by steps 8022, 8024 and 8026.
Method 8030 may include a sequence of steps 8032, 8034, 8036 and 8038.
Step 8032 may include receiving or generating an input image.
Step 8034 may include generating a signature of the input image.
Step 8036 may include comparing the signature of the input image to signatures of a certain concept structure. The certain concept structure may be generated by method 8020.
Step 8038 may include determining that the input image comprises the object when at least one of the signatures of the certain concept structure matches the signature of the input image.
Method 8040 may include the steps of method 8020 or may be preceded by steps 8022, 8024 and 8026.
Method 8040 may include a sequence of steps 8041, 8043, 8045, 8047 and 8049.
Step 8041 may include receiving or generating an input image.
Step 8043 may include generating a signature of the input image, the signature of the input image comprises only some of the certain second image identifiers; wherein the input image of the second scale.
Step 8045 may include changing a scale of the input image to the first scale to a provide an amended input image.
Step 8047 may include generating a signature of the amended input image.
Step 8049 may include verifying that the input image comprises the object when the signature of the amended input image comprises the at least one certain first image identifier.
Object detection may benefit from being robust to the angle of acquisition—to the angle between the optical axis of an image sensor and a certain part of the object. This allows the detection process to be more reliable, use fewer different clusters (may not require multiple clusters for identifying the same object from different images).
This so-called local or sliding window approach, in addition to the acquisition of enough images (that will statistically provide a large angular coverage) will enable to generate a concept structure that include signatures of an object taken at multiple directions.
Signature Tailored Matching Threshold
Object detection may be implemented by (a) receiving or generating concept structures that include signatures of media units and related metadata, (b) receiving a new media unit, generating a new media unit signature, and (c) comparing the new media unit signature to the concept signatures of the concept structures.
The comparison may include comparing new media unit signature identifiers (identifiers of objects that appear in the new media unit) to concept signature identifiers and determining, based on a signature matching criteria whether the new media unit signature matches a concept signature. If such a match is found then the new media unit is regarded as including the object associated with that concept structure.
It was found that by applying an adjustable signature matching criteria, the matching process may be highly effective and may adapt itself to the statistics of appearance of identifiers in different scenarios. For example—a match may be obtained when a relatively rear but highly distinguishing identifier appears in the new media unit signature and in a cluster signature, but a mismatch may be declared when multiple common and slightly distinguishing identifiers appear in the new media unit signature and in a cluster signature.
Method 8200 may include:
The signature matching criteria may be a minimal number of matching identifiers that indicate of a match. For example- assuming a signature that include few tens of identifiers, the minimal number may vary between a single identifier to all of the identifiers of the signature.
It should be noted that an input image may include multiple objects and that a signature of the input image may match multiple cluster structures. Method 8200 is applicable to all of the matching processes- and that the signature matching criteria may be set for each signature of each cluster structure.
Step 8210 may be preceded by step 8202 of determining each signature matching criterion by evaluating object detection capabilities of the signature under different signature matching criteria.
Step 8202 may include:
The object detection capability may reflect a percent of signatures of the group of test images that match the signature.
The selecting of the signature matching criterion comprises selecting the signature matching criterion that once applied results in a percent of signatures of the group of test images that match the signature that is closets to a predefined desired percent of signatures of the group of test images that match the signature.
The object detection capability may reflect a significant change in the percent of signatures of the group of test images that match the signature. For example—assuming, that the signature matching criteria is a minimal number of matching identifiers and that changing the value of the minimal numbers may change the percentage of matching test images. A substantial change in the percentage (for example a change of more than 10, 20, 30, 40 percent) may be indicative of the desired value. The desired value may be set before the substantial change, proximate to the substantial change, and the like.
For example, referring to
The system include various components, elements and/or units.
A component element and/or unit may be a processing circuitry may be implemented as a central processing unit (CPU), and/or one or more other integrated circuits such as application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), full-custom integrated circuits, etc., or a combination of such integrated circuits.
Alternatively, each component element and/or unit may implemented in hardware, firmware, or software that may be executed by a processing circuitry.
System 4900 may include sensing unit 4902, communication unit 4904, input 4911, one or more processors—such as processor 4950, and output 4919. The communication unit 4904 may include the input and/or the output. The communication unit 4904 may communicate with any entity—within the vehicle (for example driver device, passenger device, multimedia device), outside the vehicle (another vehicle, another computerized system—such as out-of-vehicle computerized system 4820 of
Input and/or output may be any suitable communications component such as a network interface card, universal serial bus (USB) port, disk reader, modem or transceiver that may be operative to use protocols such as are known in the art to communicate either directly, or indirectly, with other elements of the system.
Processor 4950 may include at least some out of (and thus may not include at least one out of):
While system 4900 includes a sensing unit 4902—is should be noted that it may receive sensed information from other sensors and/or that the sensing unit does not belong to the system. The system may receive information from one or more sensors located in the vehicle, associated with the vehicle, and/or located outside the vehicle.
Any method illustrated in the specification may be fully or partially executed by system 4900, and/or may be fully or partially executed by one or more other computerized system, and/or by one or more computerized systems—for example by task allocations between computerized systems, by a cooperation (for example—exchange of information, exchange of decisions, any allocation of resources, collaborative decision, and the like) between multiple computerized systems.
The one or more other computerized systems may be, for example, out-of-vehicle computerized system 4820 of figure IN, any other out-of-vehicle computerized system, one or more other in-vehicle systems, a computerized device of a person within the vehicle, any computerized system outside the vehicle—including for example a computerized system of another vehicle.
An example of an other in-vehicle system is denoted 4830 in
System 4900 may obtain sensed information from any type of sensors—a camera, one or more sensors implemented using any suitable imaging technology instead of, or in addition to, a conventional camera, an infrared sensor, a radar, an ultrasound sensor, any electro-optic sensor, a radiography sensor, a LIDAR (light detection and ranging), telemetry ECU sensor, shock sensor, etc.
System 4900 and/or other in-vehicle system is denoted 4830 may use supervised and/or unsupervised learning to perform any method executed by them.
The other in-vehicle system 4830 may be an autonomous driving system, an advance driver assistance system, or may differ from an autonomous driving system and from an advance driver assistance system.
The other in-vehicle system 4830 may include processing circuitry 210, input/output (I/O) module 220, one or more sensors 233, and database 270. The processing circuitry 210 may execute any task is it assigned or programmed to perform in relation to any of the methods illustrate din the application. Alternatively—the other in-vehicle system 4830 may include another module for executing (alone or with the processing circuit) any such task. For example—the processing circuitry may execute instructions to provide an autonomous driving manager functionality. Alternatively—another circuit or module of the in-vehicle system 4830 may provide the autonomous driving manager functionality.
Method 7002 may include a sequence of steps 7020, 7022, 7024 and 7026.
Step 7020 may include receiving or generating the media unit.
Step 7022 may include processing the media unit by performing multiple iterations, wherein at least some of the multiple iterations comprises applying, by spanning elements of the iteration, dimension expansion process that are followed by a merge operation.
Step 7024 may include selecting, based on an output of the multiple iterations, media unit regions of interest that contributed to the output of the multiple iterations.
Step 7026 may include providing a hybrid representation, wherein the hybrid representation may include (a) shape information regarding shapes of the media unit regions of interest, and (b) a media unit signature that includes identifiers that identify the media unit regions of interest.
Step 7024 may include selecting the media regions of interest per segment out of multiple segments of the media unit. See, for example,
Step 7026 may include step 7027 of generating the shape information.
The shape information may include polygons that represent shapes that substantially bound the media unit regions of interest. These polygons may be of a high degree.
In order to save storage space, the method may include step 7028 of compressing the shape information of the media unit to provide compressed shape information of the media unit.
Method 8020 may include a first sequence of steps that may include step 8022, 8024, 8026 and 8028.
Step 8022 may include receiving or generating a first image in which an object appears in a first scale and a second image in which the object appears in a second scale that differs from the first scale.
Step 8024 may include generating a first image signature and a second image signature.
The first image signature includes a first group of at least one certain first image identifier that identifies at least a part of the object.
The second image signature includes a second group of certain second image identifiers that identify different parts of the object.
The second group is larger than first group—as the second group has more members than the first group.
Step 8026 may include linking between the at least one certain first image identifier and the certain second image identifiers.
Step 8026 may include linking between the first image signature, the second image signature and the object.
Step 8026 may include adding the first signature and the second signature to a certain concept structure that is associated with the object.
Step 8028 may include determining whether an input image includes the object based, at least in part, on the linking. The input image differs from the first and second images.
The determining may include determining that the input image includes the object when a signature of the input image includes the at least one certain first image identifier or the certain second image identifiers.
The determining may include determining that the input image includes the object when the signature of the input image includes only a part of the at least one certain first image identifier or only a part of the certain second image identifiers.
The linking may be performed for more than two images in which the object appears in more than two scales.
Method 8200 may include:
The signature matching criteria may be a minimal number of matching identifiers that indicate of a match. For example—assuming a signature that include few tens of identifiers, the minimal number may vary between a single identifier to all of the identifiers of the signature.
It should be noted that an input image may include multiple objects and that a signature of the input image may match multiple cluster structures. Method 8200 is applicable to all of the matching processes—and that the signature matching criteria may be set for each signature of each cluster structure.
Step 8210 may be preceded by step 8202 of determining each signature matching criterion by evaluating object detection capabilities of the signature under different signature matching criteria.
Step 8202 may include:
The object detection capability may reflect a percent of signatures of the group of test images that match the signature.
The selecting of the signature matching criterion comprises selecting the signature matching criterion that once applied results in a percent of signatures of the group of test images that match the signature that is closets to a predefined desired percent of signatures of the group of test images that match the signature.
The object detection capability may reflect a significant change in the percent of signatures of the group of test images that match the signature. For example—assuming, that the signature matching criteria is a minimal number of matching identifiers and that changing the value of the minimal numbers may change the percentage of matching test images. A substantial change in the percentage (for example a change of more than 10, 20, 30, 40 percent) may be indicative of the desired value. The desired value may be set before the substantial change, proximate to the substantial change, and the like.
In the foregoing specification, the invention has been described with reference to specific examples of embodiments of the invention. It will, however, be evident that various modifications and changes may be made therein without departing from the broader spirit and scope of the invention as set forth in the appended claims.
Moreover, the terms “front,” “back,” “top,” “bottom,” “over,” “under” and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein.
Furthermore, the terms “assert” or “set” and “negate” (or “deassert” or “clear”) are used herein when referring to the rendering of a signal, status bit, or similar apparatus into its logically true or logically false state, respectively. If the logically true state is a logic level one, the logically false state is a logic level zero. And if the logically true state is a logic level zero, the logically false state is a logic level one.
Those skilled in the art will recognize that the boundaries between logic blocks are merely illustrative and that alternative embodiments may merge logic blocks or circuit elements or impose an alternate decomposition of functionality upon various logic blocks or circuit elements. Thus, it is to be understood that the architectures depicted herein are merely exemplary, and that in fact many other architectures may be implemented which achieve the same functionality.
Any arrangement of components to achieve the same functionality is effectively “associated” such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality may be seen as “associated with” each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being “operably connected,” or “operably coupled,” to each other to achieve the desired functionality.
Furthermore, those skilled in the art will recognize that boundaries between the above described operations merely illustrative. The multiple operations may be combined into a single operation, a single operation may be distributed in additional operations and operations may be executed at least partially overlapping in time. Moreover, alternative embodiments may include multiple instances of a particular operation, and the order of operations may be altered in various other embodiments.
Also for example, in one embodiment, the illustrated examples may be implemented as circuitry located on a single integrated circuit or within a same device. Alternatively, the examples may be implemented as any number of separate integrated circuits or separate devices interconnected with each other in a suitable manner.
However, other modifications, variations and alternatives are also possible. The specifications and drawings are, accordingly, to be regarded in an illustrative rather than in a restrictive sense.
In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word ‘comprising’ does not exclude the presence of other elements or steps then those listed in a claim. Furthermore, the terms “a” or “an,” as used herein, are defined as one or more than one. Also, the use of introductory phrases such as “at least one” and “one or more” in the claims should not be construed to imply that the introduction of another claim element by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim element to inventions containing only one such element, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an.” The same holds true for the use of definite articles. Unless stated otherwise, terms such as “first” and “second” are used to arbitrarily distinguish between the elements such terms describe. Thus, these terms are not necessarily intended to indicate temporal or other prioritization of such elements. The mere fact that certain measures are recited in mutually different claims does not indicate that a combination of these measures cannot be used to advantage.
While certain features of the invention have been illustrated and described herein, many modifications, substitutions, changes, and equivalents will now occur to those of ordinary skill in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
It is appreciated that various features of the embodiments of the disclosure which are, for clarity, described in the contexts of separate embodiments may also be provided in combination in a single embodiment. Conversely, various features of the embodiments of the disclosure which are, for brevity, described in the context of a single embodiment may also be provided separately or in any suitable sub-combination.
It will be appreciated by persons skilled in the art that the embodiments of the disclosure are not limited by what has been particularly shown and described hereinabove. Rather the scope of the embodiments of the disclosure is defined by the appended claims and equivalents thereof.
| Number | Date | Country | |
|---|---|---|---|
| 63202804 | Jun 2021 | US |
