Method and apparatus for producing still video images using electronic motion video apparatus

• US 7,110,027 B2
• Filed: 12/13/2001
• Issued: 09/19/2006
• Est. Priority Date: 12/13/2001
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Wyman, Blair
• Primary Examiner(s): Ho, Tuan
• Assistant Examiner(s): YODER III, CHRISS S
• Application Number:
  US10/021,819
• Publication Number:
  US 20030112347A1
• Time in Patent Office: 1,741 Days
• Field of Search: 348/231.2, 348/231.3, 348/231.8, 348/220.1, 348/231.9, 348/231.99, 358/518
• US Class Current: 348/231.9
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/907 using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 9/7921 for more than one processing mode

Abstract

An electronic video camera temporarily records and saves motion video in a relatively high-resolution form in a frame aging buffer. While video frames are saved in high-resolution form, it is possible to extract a relatively high-resolution still image from the buffer. The camera holds the video data in high-resolution form a limited time, eventually “aging” it as more frames are captured. The motion video is stored in persistent storage in a lower resolution form. At the user'"'"'s option, relatively higher resolution frames from the buffer can also be saved.

Claims

1. An electronic camera apparatus, comprising:

an electronic optical sensing apparatus, said electronic optical sensing apparatus sensing optical images and converting sensed images to an electronic signal;

a buffer memory;

a video storage medium interface for storing video images captured by said optical sensing apparatus on a storage medium; and

a controller which operates said electronic camera apparatus in at least one mode, said at least one mode including a first mode wherein said controller concurrently;

(a) causes said video storage medium interface to store motion video captured by said optical sensing apparatus on a video storage medium at a first resolution, and (b) temporarily stores video frames captured by said optical sensing apparatus in said buffer memory;

wherein said controller, responsive to a first user command, saves at least one frame being temporarily stored in said buffer memory in a persistent form at a second resolution, said second resolution being finer than said first resolution, said first user command being received after said electronic optical sensing apparatus captures said at least one frame being saved; and

wherein said controller automatically deletes each respective said video frame captured by said optical sensing apparatus from said buffer memory without saving the respective said video frame in a persistent form at said second resolution if a said first user command for saving the respective said video frame is not received before a pre-determined event occurs;

wherein said controller, responsive to said first user command, saves a user-selectable portion of the contents of said buffer memory in a persistent form at said second resolution, said user-selectable portion being potentially less than all of the buffer contents; and

wherein said user-selectable portion of the contents of said buffer is determined by playing the contents of said buffer back to the user on a display of said camera, and receiving a user selection corresponding to a beginning frame to be saved in said persistent form.

2. The electronic camera apparatus of claim 1, wherein said electronic optical sensing apparatus, said buffer memory, said video storage medium and said controller are mounted within a common hand-held camera housing.

3. The electronic camera apparatus of claim 1, wherein said controller operating in said first mode stores every Nth video frame captured by said optical sensing apparatus in said buffer during a respective temporary period, N being a user-selectable parameter, wherein at least one user-selectable value of N is greater than 1.

4. The electronic camera apparatus of claim 1, wherein said buffer is organized as at least one circular buffer in which the oldest stored frame is overwritten with a new frame when the new frame is captured.

5. A method for operating an electronic camera apparatus, comprising the steps of:

capturing a sequence of optical images with an electronic optical sensing apparatus;

storing motion video images from said sequence of optical images on a motion video storage medium at a first resolution;

temporarily storing image data from said sequence of optical images in a buffer, said step of temporarily storing image data being performed concurrently with said step of storing motion video images, said image data in said buffer being continuously overwritten by new image data from said sequence of optical images;

making a decision to save at least one recently captured image, said decision being made by a human user after the at least one recently captured image is captured by said electronic optical sensing apparatus; and

responsive to a command issued by said human user, said command being responsive to making said decision to save at least one recently captured image, said command being issued before said at least one recently captured image is overwritten in said buffer, saving at least some images being temporarily stored in said buffer including said at least one recently captured image in a persistent form at a second resolution, said second resolution being finer than said first resolution.

6. The method for operating an electronic camera apparatus of claim 5, wherein each video frame captured by said optical sensing apparatus is stored in said buffer during a respective temporary period.

7. The method for operating an electronic camera apparatus of claim 5, wherein every Nth video frame captured by said optical sensing apparatus is stored in said buffer during a respective temporary period, where N>

1.

8. The method for operating an electronic camera apparatus of claim 7, wherein N is a user-selectable parameter.

9. The method for operating an electronic camera apparatus of claim 5, wherein said buffer is organized as at least one circular buffer in which the oldest stored frame is overwritten with a new frame when the new frame is captured.

10. The method for operating an electronic camera apparatus of claim 9, wherein said buffer is organized as a plurality of circular buffers, each circular buffer storing frames at a respective resolution, a first circular buffer storing frames at a higher resolution than a second circular buffer.

11. The method for operating an electronic camera apparatus of claim 5, wherein a resolution of frames stored in said buffer is a user-selectable parameter.

12. The method for operating an electronic camera apparatus of claim 5, wherein said step of saving at least some images from said buffer in a persistent form comprises saving the entire contents of said buffer memory in a persistent form at said second resolution.

13. The method for operating an electronic camera apparatus of claim 5, wherein said step of saving at least some images being temporarily stored in said buffer in a persistent form comprises saving a fixed portion of the contents of said buffer memory in a persistent form at said second resolution, said fixed portion being less than all of the buffer contents.

14. The method for operating an electronic camera apparatus of claim 5, wherein said step of saving at least some images being temporarily stored in said buffer in a persistent form comprises saving a user-selectable portion of the contents of said buffer memory in a persistent form at said second resolution, said user-selectable portion being potentially less than all of the buffer contents.

15. The method for operating an electronic camera apparatus of claim 5, wherein the step of saving said at least one recently captured image comprises:

responsive to a first command issued by said human user, freezing at least a portion of said buffer containing said at least some of said optical images; and

p responsive to a second command issued by said human user, displaying images of said at least some of said optical images frozen in said buffer and receiving a user selection of at least one individual image of said frozen optical images for saving in a storage medium separate from said buffer.

16. A method for operating an electronic camera apparatus, comprising the steps of:

capturing a continuous stream of optical images with an electronic optical sensing apparatus;

temporarily storing image data from said continuous stream of optical images in a circular buffer, said circular buffer being continuously overwritten by new image data from said continuous stream of optical images;

making a decision to save at least one recently captured image, said decision being made by a human user after the at least one recently captured image is captured by said electronic optical sensing apparatus;

responsive to a command issued by said human user, said command being responsive to making said decision to save at least one recently captured image, said command being issued before said at least one recently captured image is overwritten in said circular buffer, saving at least some image data from said buffer including said at least one recently captured image in a persistent form, wherein said step of saving at least some image data from said buffer in a persistent form saves at least some frames at a first resolution;

automatically deleting each respective said optical image from said circular buffer without saving the respective said optical image in a persistent form if a said command issued by said human user for saving the respective said optical image is not received before the image is overwritten with subsequently captured image data; and

storing motion video from said continuous stream of optical images on a motion video storage medium at a second resolution, said first resolution being finer than said second resolution, said storing motion video step being performed concurrently with said temporarily storing image data step.

17. The method for operating an electronic camera apparatus of claim 16, wherein every Nth video frame captured by said optical sensing apparatus is stored in said circular buffer during a respective temporary period, N being a user-selectable parameter, wherein at least one user-selectable value of N is greater than 1.

18. A program product for controlling the operation of an electronic camera apparatus, said electronic camera apparatus having an electronic optical sensing apparatus for sensing optical images and converting sensed images to an electronic signal, said program product comprising a plurality of processor executable instructions recorded on signal-bearing media, wherein said instructions, when executed by at least one programmable processor of said electronic camera apparatus, cause the apparatus to perform the steps of:

capturing a sequence of optical images with said electronic optical sensing apparatus;

storing motion video images from said sequence of optical images on a motion video storage medium at a first resolution;

temporarily storing image data from said sequence of optical images in a buffer, said step of temporarily storing image data being performed concurrently with said step of storing motion video images, said image data in said buffer being continuously overwritten by new image data from said sequence of optical images; and

responsive to a user command, saving at least some images being temporarily stored in said buffer in a persistent form at a second resolution, said second resolution being finer than said first resolution, said user command being received before said at least some images being saved are overwritten in said buffer, said user command being responsive to a decision made by a human user, said decision being made after said electronic optical sensing apparatus captures said at least some images being saved.

19. The program product of claim 18, wherein each video frame captured by said optical sensing apparatus is stored in said buffer during a respective temporary period.

20. The program product of claim 18, wherein every Nth video frame captured by said optical sensing apparatus is stored in said buffer during a respective temporary period, where N>

1.

21. The program product of claim 18, wherein said buffer is organized as at least one circular buffer in which the oldest stored frame is overwritten with a new frame when the new frame is captured.

22. The program product of claim 18, wherein said step of saving at least some images being temporarily stored in said buffer in a persistent form comprises saving the entire contents of said buffer memory in a persistent form at said second resolution.

23. The program product of claim 18, wherein said step of saving at least some images being temporarily stored in said buffer in a persistent form comprises saving a user-selectable portion of the contents of said buffer memory in a persistent form at said second resolution, said user-selectable portion being potentially less than all of the buffer contents.

24. The program product of claim 18, wherein the step of saving at least some images being temporarily stored in said buffer comprises:

responsive to a first command issued by said human user, freezing at least a portion of said buffer containing said at least some images; and

responsive to a second command issued by said human user, displaying images of said at least some images frozen in said buffer and receiving a user selection of at least one individual image of said at least some images frozen in said buffer for saving in a storage medium separate from said buffer.

25. An electronic camera apparatus, comprising:

an electronic optical sensing apparatus, said electronic optical sensing apparatus sensing optical images and converting sensed images to an electronic signal;

a buffer memory;

a video storage medium interface for storing video images captured by said optical sensing apparatus on a storage medium; and

a controller which operates said electronic camera apparatus in at least one mode, said at least one mode including a first mode wherein said controller concurrently;

(a) causes said video storage medium interface to store motion video captured by said optical sensing apparatus on a video storage medium at a first resolution, and (b) temporarily stores sequential images captured by said optical sensing apparatus in said buffer memory, said controller continuously overwriting images temporarily stored in said buffer with subsequently captured images while operating in said first mode;

wherein said controller, responsive to a user command, saves at least one recently captured image being temporarily stored in said buffer memory in a persistent form at a second resolution, said second resolution being finer than said first resolution, said user command being received before said at least one recently captured image is overwritten in said buffer, said user command being responsive to a decision made by a human user, said decision being made after said electronic optical sensing apparatus captures said at least one recently captured image being saved.

26. The electronic camera apparatus of claim 25, wherein said electronic optical sensing apparatus, said buffer memory, said video storage medium and said controller are mounted within a common hand-held camera housing.

27. The electronic camera apparatus of claim 25,

wherein said controller, responsive to a first user command, freezes at least a portion of said buffer containing said plurality of sequential images;

and

wherein said controller, responsive to a second user command, displays images of said plurality of sequential images frozen in said buffer and receives a user selection of at least one individual image of said plurality of sequential images for saving in a storage medium separate from said buffer.

28. The electronic camera apparatus of claim 25, wherein said controller operating in said first mode stores each video frame captured by said optical sensing apparatus in said buffer during a respective temporary period.

29. The electronic camera apparatus of claim 25, wherein said controller operating in said first mode stores every Nth video frame captured by said optical sensing apparatus in said buffer during a respective temporary period, N being a user-selectable parameter, wherein at least one user-selectable value of N is greater than 1.

30. The electronic camera apparatus of claim 25, wherein said buffer is organized as at least one circular buffer in which the oldest stored image is overwritten with a new image when the new image is captured.

31. The electronic camera apparatus of claim 30, wherein said buffer is organized as a plurality of circular buffers, each circular buffer storing images at a respective resolution, a first circular buffer storing images at a higher resolution than a second circular buffer.

32. The electronic camera apparatus of claim 25, wherein said controller, responsive to said user command, saves a fixed portion of the contents of said buffer memory in a persistent form at said second resolution.

33. The electronic camera apparatus of claim 25, wherein said controller, responsive to said user command, saves a user-selectable portion of the contents of said buffer memory in a persistent form at said second resolution, said user-selectable portion being potentially less than all of the buffer contents.