This application claims the benefit of Taiwan Patent Application No. 100123436, filed on Jul. 1, 2011, in the Taiwan Intellectual Property Office, the disclosures of which are incorporated herein in their entirety by reference.
The present invention relates to a remote-control device, and more particularly to a motion-sensing remote-control device and a control system and method for controlling an operation of a screen.
At present, on the platform of the personal computer (PC), each product of the three-dimensional (3D) air mouse devices, generally collocates with the communication interface unit and the driving program of the existing two-dimensional mouse device. The current on-plane mouse device controls the cursor to move by means of sensing the plane motion distance through a mechanical and/or optical means. The 3D air mouse device drives the cursor by means of sensing the 3D motion thereof generated by the hand motion. Therefore, except the different sensing means, the cursor operation characteristics of the 3D air mouse device is in itself still similar to those of the on-plane mouse device controlled through the PC, so that it is insufficient to give full scope to the motion-sensing operation features of the 3D air mouse device for causing the cursor control to be more convenient and more nimble. In contrast therewith, when the cursor moves to a boundary area of the display area of the screen, the abovementioned cursor control method causes the cursor on the boundary no longer moves to cross the boundary in response to the motion of the remote controller or the air mouse device, and causes a problem the pointing direction of the subsequent posture orientation of the remote controller or the air mouse is inconsistent with the cursor position, and thus further causes the operation perplexity that the user posture orientation cannot be aligned with the cursor.
Besides, on the game platform of the Nintendo Company, the Wii game device has a remote controller employing an image sensor to sense two light emitting diodes, so that the remote controller can be operated to correspond to a specific range of the screen for controlling the cursor movement on the specific range. However, the abovementioned disadvantage occurring on the PC platform still exists in the Wii game device; i.e. the orientation of the remote controller cannot keep being aligned with the cursor in operation. For instance, a technical scheme in the prior art disclosed in U.S. Patent Application Publication No. 2010/0292007 A1 provides systems and methods for a control device including a movement detector.
It is considered the condition that: a handheld motion-sensing remote controller is operated to select items of the electronic menu on the screen, or a 3D air mouse device is controlled to move a cursor and conduct a click for selecting an icon. Please refer to
For instance, as shown in
However, the first operation shown in
Under this condition, the second operation shown in
It is therefore an object of the present invention to correct a sensing error, which is derived from an operation error between a remote-control device and a screen.
It is an embodiment of the present invention to provide a control system for controlling an operation of a screen having a first geometric reference. The control system includes a marking device and a remote-control device. The marking device displays a first pattern associated with the first geometric reference on the screen. The remote-control device obtains a signal from the screen. The signal represents an image having a second geometric reference and a second pattern associated with the first pattern. The second pattern and the second geometric reference have a first geometric relationship therebetween. The remote-control device uses the first geometric relationship to transform the second pattern into a third pattern, and calibrates the first geometric reference according to the third pattern for controlling the operation of the screen.
It is a further embodiment of the present invention to provide a control method for controlling an operation of a screen having a first geometric reference. The control method includes the following steps. A first pattern associated with the first geometric reference is displayed on the screen. A remote-control device is provided. A signal is obtained from the screen, wherein the signal represents an image having a second geometric reference and a second pattern associated with the first pattern, and the second pattern and the second geometric reference have a geometric relationship therebetween. The second pattern is transformed into a third pattern according to the geometric relationship. The first geometric reference is calibrated according to the third pattern for controlling the operation of the screen.
It is a further embodiment of the present invention to provide a control method for controlling an operation of a screen having a first geometric reference. The control method includes the following steps. A first pattern associated with the first geometric reference is displayed on the screen. A remote-control device is provided. A second pattern associated with the first pattern is generated, wherein the second pattern has a reference orientation. The second pattern is transformed according to the reference orientation to obtain a second geometric reference for calibrating the first geometric reference. The remote-control device is caused to control the operation of the screen based on the second geometric reference.
It is a further embodiment of the present invention to provide a control method for controlling an operation of a screen having a first geometric reference. The control method includes the following steps. A first pattern associated with the geometric reference is displayed on the screen. A remote-control device is provided. A second pattern associated with the first pattern is generated, wherein the second pattern has a reference orientation. The geometric reference is calibrated in the remote-control device according to the reference orientation for controlling the operation of the screen.
It is a further embodiment of the present invention to provide a remote-control device for controlling an operation of a screen having a geometric reference and a first pattern associated with the geometric reference. The remote-control device includes a pattern generator and a defining medium. The pattern generator generates a second pattern associated with the first pattern, wherein the second pattern has a reference orientation. The defining medium defines the geometric reference according to the reference orientation for controlling the operation of the screen.
The foregoing and other features and advantages of the present invention will be more clearly understood through the following descriptions with reference to the drawings, wherein:
a),
a),
a),
The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for the purposes of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed.
Please refer to
In one embodiment, the screen 22 further has an operation area 222. The operation area 222 is a display area or a matrix display area. For instance, the operation area 222 has a characteristic rectangle, which has an upper left corner point 22A, a lower left corner point 22B, a lower right corner point 22C and an upper right corner point 22D. The geometric reference 221 is configured to identify the operation area 222. For instance, the geometric reference 221 has a reference rectangle 2211; the reference rectangle 2211 has a reference area 2210 for identifying the operation area 222, and has four reference positions 221A, 221B, 221C and 221D; and the four reference positions 221A, 221B, 221C and 221D are located at the upper left corner point 22A, the lower left corner point 22B, the lower right corner point 22C and the upper right corner point 22D of the operation area 222, respectively. A shape of the geometric reference Q211 of the image Q21 corresponds to a shape of the geometric reference 221. For instance, the geometric reference Q211 has a characteristic rectangle Q2111. For instance, the geometric reference Q211 is fixed, and is configured to define a reference area of the image Q21.
For instance, the pattern G21 has a characteristic rectangle E21. For instance, the pattern G21 and the geometric reference 221 may have a geometric relationship RA1 therebetween, and the pattern G23 and the geometric reference Q211 have a geometric relationship R12 therebetween. The remote-control device 21 obtains the geometric relationship R11, and may transform the pattern G23 into a geometric reference GQ2 according to the geometric relationships RA1 and R12 for calibrating the geometric reference 221.
In one embodiment, the remote-control device 21 has an orientation NV1, which has a reference direction U21. The remote-control device 21 obtains the signal S11 from the screen 22 in the reference direction U21, and further obtains an estimated direction F21 for estimating the reference direction U21. For instance, the remote-control device 21 senses the pattern G21 to obtain the signal S11 in the reference direction U21, and further senses the reference direction U21 to obtain the estimated direction F21 of the remote-control device 21 in the reference direction U21. The geometric reference 221 may be configured to identify the operation area 222, which includes a predetermined position P21. The remote-control device 21 obtains the geometric reference GQ2 for calibrating the geometric reference 221 according to the geometric relationship R11, thereby correlating the reference direction U21 with the predetermined position P21. The estimated direction F21 may be configured to express the alignment direction V21 aligned with the predetermined position P21 in the reference direction U21. The estimated direction F21 may be a reference-estimated direction, and the predetermined position P21 may be a reference position. For instance, the operation area 222 has a cursor H21 located thereon; and the predetermined position P21 is located in the center portion of the operation area 222, and serves as a starting reference point of the cursor H21. The remote-control device 21 causes the cursor H21 to be located at the predetermined position P21 in the reference direction U21. In one embodiment, the remote-control device 21 correlates the reference direction U21 with the predetermined position P21 according to the geometric relationship R11 and the estimated direction F21.
In one embodiment, the geometric reference Q211 has a reference rectangle Q2111, which has a shape center CN1 and a shape principal axis AX1. The pattern G22 has a characteristic rectangle E22 corresponding to the characteristic rectangle E21, wherein the characteristic rectangle E22 has a shape center CN2 and a shape principal axis AX2. The pattern G23 has a characteristic rectangle E23 corresponding to the characteristic rectangle E21, wherein the characteristic rectangle E23 has a shape center CN3 and a shape principal axis AX3. The pattern G22 and the geometric reference Q211 have the geometric relationship R11 therebetween. The geometric relationship R11 includes a position relationship between the shape center CN1 and the shape center CN2, and a direction relationship between the shape principal axis AX1 and the shape principal axis AX2. For instance, each of the shape centers CN1, CN2 and CN3 is a respective geometric center, and each of the shape principal axis AX1 is a respective geometric principal axis.
The remote-control device 21 obtains a transformation parameter PM1 according to the geometric relationship R11, and transforms the pattern G22 into the pattern G23 according to the transformation parameter PM1, wherein the transformation parameter PM1 includes a displacement parameter associated with the position relationship, and a rotation parameter associated with the direction relationship. The pattern G23 and the geometric reference Q211 have the geometric relationship R12 therebetween. The geometric relationship R12 includes a first relationship and a second relationship, wherein the first relationship is that the shape center CN1 coincides with the shape center CN3, and the second relationship is that the shape principal axis AX1 is aligned with the shape principal axis AX3.
In one embodiment, the marking device 23 displays a digital content in the operation area 222 for displaying the pattern G21 by using a program. The pattern G21 may flicker at a specific frequency, and may also includes at least a light-emitting geometric pattern. For instance, the pattern G21 may be collocated with the digital content to flicker at the specific frequency for definitely distinguishing the pattern G21 from the external noise or the background light (the background noise). The screen 22 has the geometric reference 221 for the operation B1. The remote-control device 21 may control a change of the specific frequency according to a change of the operation B1.
In one embodiment, the pattern G21 includes four sub-patterns GA1, GB1, GC1 and GD1. The four sub-patterns GA1, GB1, GC1 and GD1 are four light-emitting marks or four light-emitting spots, respectively, and are distributed near the four corner points 22A, 22B, 22C and 22D of the operation area 222, respectively. In one embodiment, the marking device 23 includes four light-source devices 2311, 2312, 2313 and 2314. The four light-source devices 2311, 2312, 2313 and 2314 generate the sub-patterns GA1, GB1, GC1 and GD1, respectively.
In one embodiment, the operation area 222 has a first resolution. The geometric reference Q211 is configured to define an area Q211K, which has a second resolution provided by the image Q21. The remote-control device 21 correlates the pattern G23 with the geometric reference 221 by using the first and the second resolutions. For instance, the operation area 222 has a first image, and the first resolution is a resolution of the first image. According to the first and the second resolutions, dimensions of the pattern G23 are correlated with dimensions of the pattern G21, respectively, or correlated with dimensions of the geometric reference 221, respectively. In one embodiment, the pattern G23 and the operation area 222 have a first dimension and a second dimension corresponding to the first dimension, respectively; and the remote-control device 21 obtains a first scale relationship between the first and the second dimensions, and transforms the operation area 222 into the geometric reference GQ2 according to the first scale relationship and the pattern G23.
In one embodiment, the pattern G23 and the operation area 222 further have a third dimension independent of the first dimension and a fourth dimension, corresponding to the third dimension, independent of the second dimension, respectively; and the remote-control device 21 further obtains a second scale relationship between the third and the fourth dimensions, and transforms the operation area 222 into the geometric reference GQ2 according to the pattern G23 and the first and the second scale relationships.
In one embodiment, the remote-control device 21 includes a processing unit 21A, which includes an image-sensing unit 211, a motion-sensing unit 212, a communication interface unit 213 and a control unit 214. The image-sensing unit 211 has an image-sensing area 211K, and senses the pattern G21 to generate the signal S11 from the screen 22 through the image-sensing area 211K. The image-sensing unit 211 transmits the signal S11 to the control unit 214 to cause the control unit 214 to have the image Q21. The motion-sensing unit 212 generates a signal S21 in the reference direction U21, wherein the signal S21 may include sub-signals S211, S212 and S213.
The control unit 214 is coupled to the image-sensing unit 211, the motion-sensing unit 212 and the communication interface unit 213, receives the signal S11, arranges a geometric relationship R31 between the geometric reference Q211 and the image-sensing area 211K, obtains the geometric relationship R11 according to the signal S11, transforms the pattern G22 into the pattern G23 according to the geometric relationship R11, obtains the geometric reference GQ2 according to the pattern G23 to calibrate the geometric reference 221, and correlates the reference direction U21 with the predetermined position P21 according to the geometric reference GQ2 and the signal S21. The communication interface unit 213 is coupled to the control unit 214, wherein the control unit 214 controls the operation B1 of the screen 22 through the communication interface unit 213. For instance, the geometric references Q211 and GQ2 may be concentric or eccentric.
For instance, the remote-control device 21 is pointed to the predetermined position P21 to have the reference direction U21, and uses the control unit 214 to cause the cursor H21 to be located at the predetermined position P21 in the reference direction U21. For instance, the control unit 214 may further obtains a geometric relationship RA1 between the pattern G21 and the geometric reference 221, and obtains the geometric reference GQ2 according to the geometric relationship RA1 and the pattern G23.
For instance, the sub-patterns GA1, GB1, GC1 and GD1 of the pattern G21 are located near the four reference positions 221A, 221B, 221C and 221D of the geometric reference 221 (or the four corner points 22A, 22B, 22C and 22D of the operation area 222), respectively. The image-sensing unit 211 senses the sub-patterns GA1, GB1, GC1 and GD1 to generate the signal S11. The control unit 214 may directly define a perimeter 2221 (having a characteristic rectangle) and the corner points 22A, 22B, 22C and 22D of the operation area 222 through calculations. In one embodiment, the motion-sensing unit 212 includes a gyroscope 2121, an accelerometer 2122 and an electronic compass 2123. The signal S21 includes the sub-signals S211, S212 and S213. The gyroscope 2121 senses a speed of the remote-control device 21 in the reference direction U21 to generate the sub-signals S211. The accelerometer 2122 senses an acceleration and/or a pitch angle of the remote-control device 21 in the reference direction U21 to generate the sub-signals S212. The electronic compass 2123 senses a direction or an angular position of the remote-control device 21 in the reference direction U21 to generate the sub-signals S213.
In one embodiment, the control system 201 may further include a processing module 24. The processing module 24 is coupled to the remote-control device 21, the screen 22 and the marking device 23. The remote-control device 21 controls the processing module 24 to control the operation B1 of the screen 22. In the reference direction U21, the remote-control device 21 may instruct the processing module 24 to cause the cursor H21 to be located at the predetermined position P21. The processing module 24 controls the marking device 23 to display the pattern G21, and may control the pattern G21 to flicker at the specific frequency. For instance, the remote-control device 21 controls the processing module 24 to cause the marking device 23 to display the pattern G21. The processing module 24 may have a program and displays a digital content in the operation area 222 for displaying the pattern G21 by using the program. In one embodiment, the processing module 24 includes the marking device 23.
In one embodiment, a control method for calibrating a screen 22 is provided according to the illustration in
In one embodiment, the pattern G22 has a shape center CN2 and a shape principal axis AX2. The reference orientation NG22 includes the shape center CN2 and a shape principal-axis direction FAX2, wherein the shape principal-axis direction FAX2 is a direction of the shape principal axis AX2. For instance, the remote-control device 21 may has a predetermined reference coordinate system, and the reference orientation NG22 refers to the predetermined reference coordinate system. For instance, the image-sensing area 211K of the image-sensing unit 211 has the predetermined reference coordinate system.
In one embodiment, the remote-control device 21 obtains a signal S11 from the screen 22. The signal S11 represents an image Q21 having a geometric reference Q221 and the pattern G22, wherein the geometric reference Q221 has a reference orientation NQ21. The remote-control device 21 transforms the pattern G22 into a pattern G23 according to a relationship RF1 between the reference orientation NG22 and the reference orientation NQ21, and defines the geometric reference 221 as a geometric reference GQ2 according to the pattern G23 for controlling the operation B1 of the screen 22.
For instance, the geometric reference Q211 has a shape center CN1 and a shape principal axis AX1. The reference orientation NQ21 includes the shape center CN1 and a shape principal-axis direction FAX1, wherein the shape principal-axis direction FAX1 is a direction of the shape principal axis AX1. For instance, the relationship RF1 between the reference orientation NG22 and the reference orientation NQ21 includes a position relationship between the shape center CN1 and the shape center CN2, and a direction relationship between the shape principal-axis direction FAX1 and the shape principal-axis direction FAX2. For instance, the control unit 214 of the remote-control device 21 obtains a transformation parameter PM1 according to the relationship RF1, and transforms the pattern G22 into the pattern G23 according to the transformation parameter PM1.
For instance, the transformation parameter PM1 is configured to correct a sensing error, which is derived from an alignment error between the remote-control device 21 and the screen 22. For instance, the pattern G23 has a reference orientation NG23, and the reference orientation NG23 includes the shape center CN3 and a shape principal-axis direction FAX3, wherein the shape principal-axis direction FAX3 is a direction of the shape principal axis AX3, and the shape principal-axis direction FAX3 is aligned with the shape principal-axis direction FAX1. For instance, each of the shape principal-axis directions FAX1, FAX2 and FAX3 is a respective geometric principal-axis direction.
In one embodiment, a remote-control device 21 for controlling an operation B1 of a screen 22 is provided according to the illustration in
In one embodiment, the remote-control device 21 further includes a reference direction U21, a motion-sensing unit 212 and a communication interface unit 213. The pattern generator 27 has an image-sensing area 211K, and senses the pattern to generate a signal S11 from the screen 22 through the image-sensing area 211K in the reference direction U21, wherein the signal S11 represents an image Q21 including a geometric reference Q211 and the pattern G22. The motion-sensing unit 212 generates a signal S21 in the reference direction U21. The communication interface unit 213 is coupled to the defining medium 28 for controlling the operation B1.
In one embodiment, the geometric reference 221 identifies an operation area 222 on the screen 22. The operation area 222 has a cursor H21 and a predetermined position P21. The pattern G22 and the geometric reference Q211 have a geometric relationship R11 therebetween. The defining medium 28 is coupled to the communication interface unit 213, the pattern generator 27 and the motion-sensing unit 212, receives the signal S11, arranges a geometric relationship R31 between the geometric reference Q211 and the image-sensing area 211K, obtains the geometric relationship R11 according to the signal S11, transforms the pattern G22 into a pattern G23 according to the geometric relationship R11, obtains a geometric reference GQ2 according to the pattern G23 to define the geometric reference 221, and correlates the reference direction U21 with the predetermined position P21 according to the geometric relationship R11 and the signal S21.
In one embodiment, the defining medium 28 correlates the reference direction U21 with the predetermined position P21 according to the geometric relationship R11 and the estimated direction F21. The pattern G23 and the geometric reference Q211 have a geometric relationship R12 therebetween. The defining medium 28 obtains a geometric relationship RA1 between the pattern G21 and the geometric reference 211 for obtaining the geometric reference GQ2. The defining medium 28 causes the cursor H21 to be located at the predetermined position P21 in the reference direction U21. The geometric reference Q211 has a shape center CN1 and a shape principal axis AX1, the pattern G22 has a shape center CN1 and a shape principal axis AX2, and the pattern G23 has a shape center CN3 and a shape principal axis AX3. The geometric relationship R11 includes a position relationship between the shape center CN1 and the shape center CN2 and a direction relationship between the shape principal axis AX1 and the shape principal axis AX2. The shape principal axis AX2 has a direction FAX2, and the reference orientation NG22 includes the shape center CN2 and the direction FAX2.
In one embodiment, the remote-control device 21 obtains a transformation parameter PM1 according to the geometric relationship R11, and transforms the pattern G22 into the pattern G23 according to the transformation parameter PM1, wherein the transformation parameter PM1 includes a displacement parameter associated with the position relationship and a rotation parameter associated with the direction relationship. The geometric relationship R12 includes a first relationship and a second relationship, wherein the first relationship is that the shape center CN1 coincides with the shape center CN3, and the second relationship is that the shape principal axis AX1 is aligned with the shape principal axis AX3.
In one embodiment, the operation area 222 has a first resolution, the second geometric reference Q211 defines a first area having a second resolution provided by the image Q21, and the defining medium 28 uses the first and the second resolutions to correlate the pattern G23 with the geometric reference 221. The pattern G23 and the operation area 222 have a first dimension and a second dimension corresponding to the first dimension, respectively. The defining medium 28 obtains a scale relationship between the first and the second dimensions, and transforms the operation area 222 into the geometric reference GQ2 according to the scale relationship and the pattern G23.
In one embodiment, a control method for controlling an operation B1 of a screen 22 is provided according to the illustration in
Please refer to
The screen 22 has an operation area 222, which has a geometric reference 221; and the geometric reference 221 is configured to identify the operation area 222. The operation area 222 has a length Ld, a width Wd, and four corner points 22A, 22B, 22C and 22D. For instance, the operation area 222 is a display area, and may be located on the screen 22. The marking device 23 is coupled to the screen 22, and displays the pattern G21 associated with the corner points 22A, 22B, 22C and 22D on the screen 22.
In
In
In
In
Additionally, the remote-control device 21 receives the light spots, processes the received light spots, obtains the geometric reference GQ2 by calculations, and utilizes the geometric reference GQ2 to define the coordinates of the four corner points 22A, 22B, 22C and 22D of the operation area 222 (or the four reference positions 221A, 221B, 221C and 221D of the geometric reference 221) for indicating the perimeter 2221 of the operation area 222 in the remote-control device 21, wherein the upper left corner point 22A, the lower left corner point 22B, the lower right corner point 22C and the upper right corner point 22D have coordinates A1(XL, YU), B1(XL, YD), C1(XR, YD) and D1(XR, YU), respectively. The four light spots in each of the configurations 301, 302 and 303 have a characteristic rectangle.
The image-sensing unit 211 of the remote-control device 21 has a pixel matrix unit (not shown), which has an image-sensing area 211K. The remote-control device 21 has a reference direction U21, and obtains the signal S11 representing the image Q21 of the screen 22 from the screen 22 through the image-sensing area 211K in the reference direction U21. The image Q21 in the pixel matrix unit has an image-sensing range Q212, a geometric reference Q211 and the pattern G22 associated with the pattern G21, wherein the image-sensing range Q212 represents the range of the image-sensing area 211K. For instance, the image-sensing area 211K may be a matrix sensing area, a pixel matrix sensing area or an image-sensor sensing area. The image-sensing unit 211 generates the signal S11 having the image Q21. The control unit 214 of the remote-control device 21 receives the signal S11, and processing the image Q21 according to the signal S11.
In one embodiment, the control unit 214 arranges a geometric relationship R41 between the geometric reference Q211 and the image-sensing range Q212. For instance, the geometric reference Q211 is configured to define the image-sensing range Q212. For instance, the geometric reference Q211 is configured to define a specific range Q2121 in the image-sensing range Q212. The specific range Q2121 and the image-sensing range Q212 have a specific geometric relationship therebetween, and the specific geometric relationship may include at least one selected from a group consisting of the same shape, the same shape center and the same shape principal-axis direction.
Please refer to
The characteristic rectangle E22 has a pattern area length Lid, a pattern area width Wid, a pattern area center point Oid (or the shape center CN2), a shape principal axis AX2 and four corner points Aid, Bid, Cid and Did. The displacement from the image-sensing area center point Ois to the pattern area center point Oid has a component in a direction of the abscissa axis x, which is expressed as Δx. The displacement from the image-sensing area center point Ois to the pattern area center point Oid has a component in a direction of the ordinate axis y, which is expressed as Δy. The space from the abscissa (ordinate) axis (or the orientation or the shape principal axis AX1) of the geometric reference Q211 to the abscissa (or ordinate) axis (or the orientation or the shape principal axis AX2) of the pattern G22 has an angle θ. The control unit 214 obtains the geometric relationship R11 between the pattern G22 and the geometric reference Q211 by using the abovementioned analysis. The pattern G22 defines a first pattern area, and the geometric reference Q211 defines a second pattern area.
For instance, the remote-control device 21 employs a coordinate transformation to transform the pattern G22 into the pattern G23 for calibrating the screen 22. In
Afterward, the new center point Oidc serves as a rotation center point, and the pattern G22 is rotated by an angle (−θ) of the angle θ around the new center point Oidc in the plane based on the abscissa and the ordinate axes of the geometric reference Q211. Therefore, the angle θ between the pattern G22 and the geometric reference Q211 will disappear due to the rotation, wherein the abscissa (or ordinate) axis or the orientation of the pattern G22 will coincide with that of the geometric reference Q211, or the abscissa (or ordinate) axis or the orientation of the first pattern area will coincide with that of the second pattern area. As shown in
The control unit 214 obtains a transformation parameter PM1 according to the geometric relationship R11, and transforms the pattern G22 into the pattern G23 according to the transformation parameter PM1, wherein the transformation parameter PM1 includes a displacement parameter and a rotation parameter. For instance, the displacement parameter includes the displacement Δx and the displacement Δy, and the rotation parameter includes the angle (−θ). For instance, the pattern G23 has a characteristic rectangle E23, which has a characteristic rectangular area. The characteristic rectangle E23 has a pattern area length Lidc, a pattern area width Widc, a pattern area center point Oidc (or the shape center CN3), a shape principal axis AX3 and four corner points Aidc, Bidc, Cidc and Didc, wherein there are the relationships of Lidc=Lid and Widc=Wid. In the pattern model 322, the pattern G23 and the geometric reference Q211 have a geometric relationship R12 therebetween.
The pattern G22 and the pattern G23 have the following relationships therebetween. The corner point Aid and the corner point Cid defines a straight line Aid_Cid, the corner point Bid and the corner point Did defines a straight line Bid_Did, and the straight line Aid_Cid crosses the straight line Bid_Did at an intersection point. The pattern area center point Oid may be obtained from the intersection point by solving the simultaneous equations of the straight line Aid_Cid and the straight line Bid_Did. The angle θ may be obtained from the formula
wherein there are the relationships of V=y_Did-y_Aid and H=x_Did-x_Aid, y_Did represents the ordinate coordinate of the corner point Did, and x_Aid represents the abscissa coordinate of the corner point Aid. As shown in
wherein x′: x_Aidc, x_Bidc, x_Cidc, x_Didc; y′: y_Aidc, y_Bidc, y_XCidc, y_Didc; x: x_Aid, x_Bid, x_Cid, x_Did; y′: y_Aid, y_Bid, y_XCid, y_Did; (x, y) represents the coordinate of any one selected from a group consisting of the corner points Aid, Bid, Cid and Did; and (x′, y′) represents the coordinate of any one selected from a group consisting of the corner points Aidc, Bidc, Cidc and Didc.
The pattern area length Lidc and the pattern area width Widc of the pattern G23 are equal to the pattern area length Lid and the pattern area width Wid of the pattern G22, respectively. The control unit 214 may utilize a length-scaling factor SL and a width-scaling factor SW to convert the pattern area length Lidc and the pattern area width Widc into an adjusted pattern area length and an adjusted pattern area width, respectively, so that the adjusted pattern area length and the adjusted pattern area width are consistent with the length Ld and the width Wd of the operation area 222, respectively. The length-scaling factor SL may has a relationship of SL=Ld/Lidc, and the width-scaling factor SW may has a relationship of SW=Wd/Widc; that is to say, Ld=Lidc×SL, and Wd=Widc×SW.
In the practical application, the control unit 214 may use the resolution of the operation area 222 and the resolution of the geometric reference Q211 to obtain the length-scaling factor SL and the width-scaling factor SW. The resolutions of the common image senor may have the following types: the CIF type has the resolution of 352×288 pixels being about 100,000 pixels; the VGA type has the resolution of 640×480 pixels being about 300,000 pixels; the SVGA type has the resolution of 800×600 pixels being about 480,000 pixels; the XGA type has the resolution of 1024×768 pixels being about 790,000 pixels; and the HD type has the resolution of 1280×960 pixels being about 1.2 M pixels. The resolutions of the common display device for the personal computer may have the following types: 800×600 pixels, 1024×600 pixels, 1024×768 pixels, 1280×768 pixels and 1280×800 pixels.
As shown in
The control unit 214 stores the coordinates of the corner points 42A, 42B, 42C and 42D, and defines the pattern area 421 and a perimeter 4211 of the pattern area 421 according to the coordinates of the corner points 42A, 42B, 42C and 42D, wherein the perimeter 4211 includes four boundaries 421P, 421Q, 421R and 421S, and the length Lg and the width Wg of the pattern area 421 are equal to the length Ld and the width Wd of the operation area 222, respectively. In this way, the perimeter 4211 of the pattern area 421 and the perimeter 2221 of the operation area 222 may have a direct correspondence relationship of the same dimensions and the same orientations. The remote-control device 21 regards the coordinates of the corner points 42A, 42B, 42C and 42D as reference coordinates to start a cursor to move with a motion of the remote-control device 21.
In one embodiment, the pattern G21 and the corner points 22A, 22B, 22C and 22D of the operation area 222 have a first relationship thereamong, wherein the corner points 22A, 22B, 22C and 22D have the coordinates A1(XL, YU), B1(XL, YD), C1(XR, YD) and D1(XR, YU), respectively. For instance, the light spots G2171, G2172, G2173 and G2174 of the pattern G21 and the coordinates A1(XL, YU), B1(XL, YD), C1(XR, YD) and D1(XR, YU), respectively corresponding to the light spots G2171, G2172, G2173 and G2174, have a position relationship thereamong. The remote-control device 21 may obtain the position relationship and dimensions of the operation area 222 beforehand. According to the pattern model 322, the position relationship and the dimensions of the operation area 222, the remote-control device 21 may obtain a second relationship between the pattern G23 and the operation area 222, and transform the pattern G23 into the pattern G24. The pattern G24 has a characteristic rectangle E24, which has four corner points Aih, Bih, Cih and Dih. The remote-control device 21 obtains coordinates of the corner points Aih, Bih, Cih and Dih to define the corner points 42A, 42B, 42C and 42D of the geometric reference GQ2, respectively, and uses the corner points 42A, 42B, 42C and 42D to define the perimeter 2221 of the operation area 222 and respectively define the corner points 22A, 22B, 22C and 22D of the operation area 222. For instance, the geometric center of the characteristic rectangle E24 may be located at the image-sensing area center point Ois (or the shape center CN1).
While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims, which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.
Number | Date | Country | Kind |
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100123436 | Jul 2011 | TW | national |