Processing for judging whether a face is included in a frame is performed, in a predetermined interval, on each of frames included in a moving image of a subject, displayed on a monitor, until the judgment becomes positive. If it is judged that a face is included in a frame, the facial position is d
Processing for judging whether a face is included in a frame is performed, in a predetermined interval, on each of frames included in a moving image of a subject, displayed on a monitor, until the judgment becomes positive. If it is judged that a face is included in a frame, the facial position is detected in the frame, and stored. Then, judgment is made as to whether a face is included in the next frame after predetermined time. If the judgment is positive, the facial position is detected. The previously stored facial position is replaced by the newly detected facial position, and the newly detected facial position is stored. These processes are repeated until photographing operation is performed by operating a release unit.
대표청구항▼
1. A photographing apparatus comprising: a photographing device for obtaining image data of a subject;a display for displaying the image data;a release device for performing a photographing operation;a memory for storing facial position data;a storage for storing the image data;a photographing contr
1. A photographing apparatus comprising: a photographing device for obtaining image data of a subject;a display for displaying the image data;a release device for performing a photographing operation;a memory for storing facial position data;a storage for storing the image data;a photographing control device for obtaining a moving image of the subject by continuously obtaining image data with the photographing device and displaying the moving image on the display;a face judgment device for performing processing, at predetermined or varying time intervals, for judging whether a human face is included in a frame of the moving image;a face detection device for detecting a facial position in the frame, in the case that the frame has been judged to include a face by the face judgment device; anda control device for controlling the photographing device, the face judgment device, the face detection device, the memory, and the storage so that a judgment is made as to whether the face is included in a first frame of the moving image, and if the judgment is positive, a first facial position is detected, the first facial position is stored in the memory, and judgment is made as to whether the face is included in a second frame of the moving image after the predetermined or varying time interval, and if it is judged that the face is included in the second frame, a second facial position is detected, and the second facial position is either stored in the memory or replaces the first facial position stored in the memory,and until the release device performs the photographing operation, judgment is made as to whether the face is included in the next frame further after the predetermined time or varying time interval, and if it is judged that the face is included in the frame, the facial position is detected, and the facial position is either stored in the memory or replaces the facial position stored in the memory,wherein a frame obtained when the release device performs the photographing operation is stored in a recording medium as an image. 2. A photographing apparatus according to claim 1, wherein the control device stores the second facial position in memory by replacing the first facial position with the second facial position. 3. A photographing apparatus according to claim 1, wherein the face judgment device judges whether a human face is included in the second frame by judging a region in the second frame according to the first facial position. 4. A photographing apparatus according to claim 3, wherein the first facial position defines a region in the first frame, and wherein the region in the second frame includes the location of the region in the first frame. 5. A photographing apparatus according to claim 4, wherein the region in the second frame is larger than the region in the first frame. 6. A photographing apparatus according to claim 1, further comprising: a variation judgment device, under the control of the control device, that judges whether the image in the first frame differs from the image of the second frame by more than a predetermined value. 7. A photographing apparatus according to claim 6, wherein the face judgment device judges whether a human face is included in the second frame by judging a region in the second frame according to the first facial position if the variation judgment device judges that the difference is less than or equal to the predetermined value, and wherein the face judgment device judges whether a human face is included in the second frame by judging the entire image in the second frame if the variation judgment device judges that the difference is more than the predetermined value. 8. A photographing apparatus according to claim 7, wherein the difference is calculated according to an absolute value of the difference in the average value of pixel values in the image of the first frame and the image of the second frame. 9. A photographing apparatus according to claim 1, wherein the photographing apparatus is a digital camera. 10. A photographing apparatus according to claim 1, further comprising: an image processor for performing at least one of red-eye correction processing, noise suppression processing on the region of the image representing a face, density correction processing, and gradation correction processing on the image data based on the facial position stored in memory after the photographing operation is performed. 11. A photographing apparatus according to claim 10, wherein the image processor judges whether the eyes in the detected face located in the facial position stored in memory are closed in a frame selected during the photographing operation and, if the eyes are closed, selects a frame having a face with open eyes from temporally adjacent frames. 12. A photographing apparatus according to claim 10, wherein the image processor judges whether the detected face located in the facial position stored in memory is a smiling face in a frame selected during the photographing operation and, if it is not a smiling face, selects a frame having a smiling face from temporally adjacent frames. 13. A photographing apparatus according to claim 1, wherein a set of image data comprising a plurality of frames is obtained when the release device performs the photographing operation. 14. A photographing apparatus according to claim 1, wherein the time interval is more than one frame. 15. A photographing method for use with an apparatus comprising a photographing device for obtaining image data of a subject, a display for displaying the image data, a release device for performing a photographing operation, a memory for storing a facial position data, a storage for storing the image data, and a photographing control device for obtaining a moving image of the subject by continuously obtaining image data with the photographing device and displaying the moving image on the display, the method comprising the steps of: performing processing, at predetermined or varying time intervals, for judging whether a human face is included in a first frame of the moving image;detecting a first facial position in the frame, in the case that the frame has been judged to include a face;storing the first facial position in the memory; andjudging whether a human face is included in a second frame of the moving image after the predetermined or varying time interval, and if the judgment is positive, detecting a second facial position, storing the second facial position in the memory or replacing the first facial position in the memory with the second facial position, anduntil the release device performs the photographing operation, judging whether the face is included in the next frame further after the predetermined time or varying time interval, and if it is judged that the face is included in the frame, the facial position is detected, and the facial position is either stored in the memory or replaces the facial position stored in the memory; andstoring an image in a recording medium when the release device performs the photographing operation. 16. A method according to claim 15, wherein storing the second facial position in memory includes replacing the first facial position with the second facial position. 17. A method according to claim 15, wherein judging whether a human face is included in the second frame includes judging a region in the second frame according to the first facial position. 18. A method according to claim 17, wherein the first facial position defines a region in the first frame, and wherein the region in the second frame includes the location of the region in the first frame. 19. A method according to claim 18, wherein the region in the second frame is larger than the region in the second frame. 20. A method according to claim 15, further comprising: judging whether the image in the first frame differs from the image of the second frame by more than a predetermined value. 21. A method according to claim 20, wherein judging whether a human face is included in the second frame includes: judging a region in the second frame according to the first facial position if it is judged that the difference is less than or equal to the predetermined value; andjudging the entire image in the second frame if it is judged that the difference is more than the predetermined value. 22. A method according to claim 21, further comprising calculating the difference according to an absolute value of the difference in the average value of pixel values in the image of the first frame and the image of the second frame. 23. A method according to claim 15, wherein the photographing apparatus is a digital camera. 24. A method according claim 15, further comprising: performing at least one of red-eye correction processing, noise suppression processing on the region of the image representing a face, density correction processing, and gradation correction processing on the image data based on the facial position stored in memory after the photographing operation is performed. 25. A method according to claim 24, further comprising judging whether the eyes in the detected face located in the facial position stored in memory are closed in a frame selected during the photographing operation and, if the eyes are closed, selecting a frame having a face with open eyes from temporally adjacent frames. 26. A method according to claim 24, further comprising judging whether the detected face located in the facial position stored in memory is a smiling face in a frame selected during the photographing operation and, if it is not a smiling face, selecting a frame having a smiling face from temporally adjacent frames. 27. A method according to claim 15, wherein obtaining a frame in response to the photographing operation includes obtaining a set of image data comprising a plurality of frames. 28. A method according to claim 15, wherein the time interval is more than one frame. 29. The method of claim 15, wherein judging whether the human face is included in the frame of the moving image comprises extracting a plurality of facial candidates, and discriminating whether each of the facial candidates is a face. 30. A photographing apparatus as defined in claim 1, wherein the face judgment device judges whether the human face is included in the frame of the moving image by extracting a plurality of facial candidates, and discriminating whether each of the facial candidates is a face.
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이 특허에 인용된 특허 (12)
Badique Eric (Nurnberg DEX), Circuit arrangement for recognizing a human face.
Prasad K. Venkatesh (Cupertino CA) Stork David G. (Stanford CA), Facial feature extraction method and apparatus for a neural network acoustic and visual speech recognition system.
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