Patent Application
20060050167
The present invention relates generally to digital cameras.
With data storage devices for digital cameras currently exceeding one gigabyte, reviewing photographs stored on a storage device is becoming very cumbersome. Prior digital cameras typically allow a user to sequence through the photographs one at a time. Also, some conventional digital cameras allow the user to roll over from the last stored photograph back to the first photograph.
Other conventional cameras allow the user to specify a number of thumbnail pictures that should be displayed on the viewfinder (1, 2, 4, 9, for example). However, this approach requires the camera to read the image data from the data storage device (memory card) and format it appropriately for viewing. This is both time and power consuming.
More particularly, because of the increasing density of memory cards that are supported by these cameras, dealing with the large amounts of data is becoming more difficult. On a 3.3 Megapixel camera, a 512 Megabyte flash memory card can store well over 300 photographs. Nearly all camera's allow a user to sequence through the photographs using a cursor pad or a roller thumb wheel. If the memory card is full or nearly full, it is very time consuming and cumbersome to sequence through the stored photographs one at a time. Also, sequencing through the photographs requires a substantial amount of battery power because the viewfinder is active and the flash memory card is being actively read.
Thus, it is very desirable to allow the user to get to a desired photograph quickly. It would be desirable to have a simple and efficient way to navigate through the stored photographs using a relative position index screen and a roller wheel or a cursor pad.
An embodiment of the present invention comprises a system embodied in a digital camera that provide for an efficient technique for locating photographs stored in a data storage device. The digital camera comprises a display, a memory device for storing digital photographs, a navigation device, and processing circuitry coupled to the display, memory device and navigation device. Firmware runs on the processing circuitry and implements a user interface in conjunction with the navigation device and display. The firmware displays a bar graph and a marker on the display identifying the relative location of a currently displayed photograph, and configures the navigation device to selectively move the marker left and right along the bar graph to locate photographs stored in the memory device.
In an exemplary embodiment of the invention, images are not displayed until a user selects the relative location of the image or images using a slider bar (bar graph). Then, after action by the user, or after a short time delay, the image at that relative location is displayed. This conserves considerable battery power such as when still images of movie sequences, or still images from a chain of still images, are displayed without delay in response to the position of the marker relative to the slider bar (bar graph).
The various features and advantages of embodiments of the present invention may be more readily understood with reference to the following detailed description taken in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements, and in which:
a and 1b are rear and front views, respectively, of an exemplary digital camera implemented in accordance with the principles of the present invention for locating photographs stored in a data storage device; and
Referring to the drawing figures,
As is shown in
As is shown in
An image sensor 11 is coupled to processing circuitry 12 (illustrated using dashed lines) that are housed within the body section 30, for example. An exemplary embodiment of the processing circuitry 12 comprises a microcontroller (μC) 12 or central processing unit (CPU) 12. The μC 12 or CPU 12 is coupled to a nonvolatile (NV) storage device 14, such as flash memory 14 (flash memory card 14), for example, and a high speed (volatile) storage device 15, such as synchronous dynamic random access memory (SDRAM) 15, for example.
The processing circuitry 12 (microcontroller (μC) 12 or CPU 12) in the digital camera 10, embodies firmware 13 comprising one or more photo navigation algorithms 13 in accordance with the principles of the present invention. The firmware 13 is operative to rapidly navigate through photographs stored in the flash memory 14 of the digital camera 10. Many currently-available digital cameras 10 have the ability to add additional memory 14 using memory cards 14 such as compact flash cards, secure digital cards, and Sony® Memory Sticks, to name just a few. The density and memory size of these memory cards 14 are becoming increasingly large. Thus, having the ability to quickly and efficiently get to photographs stored on a memory card 14 is very beneficial to the user. The concepts of the present invention may best be described through an example.
A user wants to show a friend some photographs that were taken on his or her digital camera 10. The camera 10 contains a large memory storage card 14 that currently has 300 photographs stored on it. The user knows that the photograph he or she wants is probably stored somewhere in the middle of the card 14. He or she brings up a preview screen on the image display 32 and selects a “Quick Find” graphical mode.
The firmware 13 displays a bar graph 17 and a marker 18 on the display 32 identifying the relative location of a currently displayed photograph, and configures a navigation device 34 (such as the cursor pad 34) to selectively move the marker 18 left and right along the bar graph 17 to locate photographs stored in the memory device 14.
The “Quick Find” graphical mode displays the bar graph 17 on the viewfinder 32 or display 32 and places the marker 18 on or adjacent to the bar graph 17 to show the relative location of the current photograph. The user then moves the marker 18 left or right along the bar graph 17 using the cursor pad 34 or a thumbwheel 35 (retasked zoom control dial 35). If the user holds a direction button 34a down on the cursor pad 34, the marker 18 accelerates in that direction. If the user lets up on the button 34a and presses it a little at a time, the marker 18 moves a photograph at a time.
If the thumbwheel 35 is used, for example, single clicks moves the marker 18 a photograph at a time, while fast rolls move the marker 18 on the order of ten or more photographs at a time. If the input device (cursor pad 34 or thumbwheel 35) is left stable for a predetermined amount of time, then the camera 10 reads the photograph at the current position of the marker 18 and displays it on the viewfinder 32. After a longer time period with no input stimulus, the “Quick Find” bar graph disappears.
In an exemplary embodiment of the present invention, images are not displayed until the user selects the relative location of the image or images using a slider bar 17 (bar graph 17). Then, after action by the user, or after a short time delay, the image at that relative location is displayed. This conserves considerable battery power such as when still images of movie sequences, or still images from a chain of still images, are displayed without delay in response to the position of the marker relative to the slider bar 17 (bar graph 17).
An advantage of the present invention is that navigating through a large number of photographs is greatly improved and reduces wear and tear on the input device, reduces power consumption, and reduces the amount of time it takes to find the desired photograph.
For the purposes of completeness,
A digital recording device 10 is provided 71 comprising a display 32, a memory device 14 for storing digital photographs, a navigation device 34, 35, processing circuitry 12 coupled to the display, memory device and navigation device, and firmware 13 that runs on the processing circuitry and that implements a user interface 50 in conjunction with the navigation device and display, for displaying a bar graph 17 and a marker 18 on the display identifying the relative location of a currently displayed photograph, and for configuring the navigation device to selectively move the marker left and right along the bar graph to locate photographs stored in the memory device.
A bar graph 17 and a marker 18 are displayed 72 on the display 32 identifying the relative location of a currently displayed photograph. A navigation device 34 is configured 73 to selectively move the marker 18 left and right along the bar graph 17 to locate photographs stored in the memory device 14. A user moves 74 the marker 18 left or right along the bar graph 17 using the navigation device 34.
Optionally, if the user holds 75 a direction button 34a down on the navigation device 34, the marker 18 accelerates in that direction. Optionally, if the user lets up on the button 34a and presses 76 it a little at a time, the marker 18 moves a photograph at a time.
If the thumbwheel 35 is used as the navigation device 34, single clicks moves the marker 18 a photograph at a time, while fast rolls move the marker 18 on the order of ten or more photographs at a time. If the navigation device 34 (cursor pad 34 or thumbwheel 35) is left stable for a predetermined amount of time, then the camera 10 reads the photograph at the current position of the marker 18 and displays it on the viewfinder 32. After a longer time period with no input stimulus, the “Quick Find” bar graph disappears.
Thus, digital cameras have been disclosed that provide for rapid location and display of photographs stored in a data storage device. It is to be understood that the above-described embodiments are merely illustrative of some of the many specific embodiments that represent applications of the principles of the present invention. Clearly, numerous and other arrangements can be readily devised by those skilled in the art without departing from the scope of the invention.
