Digital image processing using face detection and skin tone information
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06K-009/00
H04N-007/18
출원번호
UP-0554539
(2006-10-30)
등록번호
US-7844076
(2011-01-31)
발명자
/ 주소
Corcoran, Peter
Barcovschi, Igor
Steinberg, Eran
Prilutsky, Yury
Bigioi, Petronel
출원인 / 주소
FotoNation Vision Limited
대리인 / 주소
Smith, Andrew V.
인용정보
피인용 횟수 :
54인용 특허 :
257
초록▼
A technique for processing a digital image uses face detection to achieve one or more desired image processing parameters. A group of pixels is identified that corresponds to a face image within the digital image. A skin tone is detected for the face image by determining one or more default color or
A technique for processing a digital image uses face detection to achieve one or more desired image processing parameters. A group of pixels is identified that corresponds to a face image within the digital image. A skin tone is detected for the face image by determining one or more default color or tonal values, or combinations thereof, for the group of pixels. Values of one or more parameters are adjusted for the group of pixels that correspond to the face image based on the detected skin tone.
대표청구항▼
What is claimed is: 1. A method of processing a digital image using face detection to achieve one or more desired image processing parameters, comprising using a processor within an image acquisition and processing apparatus to perform an image processing method including: generating in-camera, cap
What is claimed is: 1. A method of processing a digital image using face detection to achieve one or more desired image processing parameters, comprising using a processor within an image acquisition and processing apparatus to perform an image processing method including: generating in-camera, capturing or otherwise obtaining in-camera a collection of low resolution images including a face; tracking said face within said collection of low resolution images; loading one or more default image attributes that correspond to one or more of desired color balance, exposure, or contrast values for a group of pixels that include the face based on the tracking; capturing a main digital image with said apparatus that further comprises an imaging optical system; identifying a group of pixels that correspond to said face image within the main digital image; determining one or more of actual color balance, exposure, or contrast values for the group of pixels that correspond to the face within the main digital image; comparing the default image attributes for the group of pixels with the actual values for the group of pixels within the main digital image; and providing digital enhancement of the main digital image by adjusting one or more of color balance, exposure, or contrast for the face image based on the comparing, including adjusting color or luminance, or both, of one or more selected pixels of the group of pixels. 2. The method of claim 1, further comprising: identifying a second group of pixels that corresponds to a second face within the main digital image; determining one or more of color balance, exposure, or contrast of the second face image which differs from that of the first face image; providing further digital enhancement of the main digital image by adjusting one or more of color balance, exposure, or contrast for the second face image which differs from that provided for the first face image, including adjusting color or luminance, or both, of one or more selected pixels of the second group of pixels. 3. The method of claim 2, wherein the adjusted values of one or more of color balance, exposure, or contrast of the two face images are closer to each other than their original values. 4. The method of claim 3, wherein said adjusted values of the two face images are substantially equal to each other. 5. The method of claim 1, further comprising: detecting a skin tone for the face image by determining one or more default color or tonal values, or combinations thereof, for the group of pixels; and adjusting values of one or more parameters for the group of pixels that correspond to the face image based on the detected skin tone. 6. An image acquisition apparatus including an imaging optical system and digital image detector and storage medium, and having stored therein program instructions for programming one or more processors to perform a method of processing a digital image using face detection to achieve one or more desired image processing parameters in an enhanced version of the digital image, the method comprising: generating in-camera, capturing or otherwise obtaining in-camera a collection of low resolution images including a face; tracking said face within said collection of low resolution images; loading one or more default image attributes that correspond to one or more of desired color balance, exposure, or contrast values for a group of pixels that include the face based on the tracking; capturing a main digital image with said apparatus that further comprises an imaging optical system; identifying a group of pixels that correspond to a face image within the main digital image; determining one or more of actual color balance, exposure, or contrast values for the group of pixels that correspond to the face within the main digital image; comparing the default image attributes for the group of pixels with the actual values for the group of pixels within the main digital image; and providing digital enhancement of the main digital image by adjusting one or more of color balance, exposure, or contrast for the face image based on the comparing, including adjusting color or luminance, or both, of one or more selected pixels of the group of pixels. 7. The apparatus of claim 6, wherein the method further comprises: identifying a second group of pixels that corresponds to a second face within the main digital image; determining one or more of color balance, exposure, or contrast of the second face image which differs from that of the first face image; providing further digital enhancement of the digital image by adjusting one or more of color balance, exposure, or contrast for the second face image which differs from that provided for the first face image, including adjusting color or luminance, or both, of one or more selected pixels of the second group of pixels. 8. The apparatus of claim 7, wherein the adjusted values of one or more of color balance, exposure, or contrast of the two face images are closer to each other than their original values. 9. The apparatus of claim 8, wherein said adjusted values of the two face images are substantially equal to each other. 10. The apparatus of claim 6, wherein the method further comprises: detecting a skin tone for the face image by determining one or more default color or tonal values, or combinations thereof, for the group of pixels; and adjusting values of one or more parameters for the group of pixels that correspond to the face image based on the detected skin tone. 11. One or more digital storage devices having embedded therein program instructions for programming one or more processors to perform a method of processing a digital image using face detection to achieve one or more desired image processing parameters in a modified version of the digital image, the method comprising: generating in-camera, capturing or otherwise obtaining in-camera a collection of low resolution images including a face; tracking said face within said collection of low resolution images; loading one or more default image attributes that correspond to one or more of desired color balance, exposure, or contrast values for a group of pixels that include the face based on the tracking; capturing a main digital image with said apparatus that further comprises an imaging optical system; identifying a group of pixels that correspond to a face image within the main digital image; determining one or more of actual color balance, exposure, or contrast values for the group of pixels that correspond to the face within the main digital image; comparing the default image attributes for the group of pixels with the actual values for the group of pixels within the main digital image; and providing digital enhancement of the main digital image by adjusting one or more of color balance, exposure, or contrast for the face image based on the comparing, including adjusting color or luminance, or both, of one or more selected pixels of the group of pixels. 12. The one or more storage devices of claim 11, wherein the method further comprises: identifying a second group of pixels that corresponds to a second face within the main digital image; determining one or more of color balance, exposure, or contrast of the second face image which differs from that of the first face image; providing further digital enhancement of the digital image by adjusting one or more of color balance, exposure, or contrast for the second face image which differs from that provided for the first face image, including adjusting color or luminance, or both, of one or more selected pixels of the second group of pixels. 13. The one or more storage devices of claim 12, wherein the adjusted values of one or more of color balance, exposure, or contrast of the two face images are closer to each other than their original values. 14. The one or more storage devices of claim 13, wherein said adjusted values of the two face images are substantially equal to each other. 15. The one or more storage devices of claim 11, wherein the method further comprises: detecting a skin tone for the face image by determining one or more default color or tonal values, or combinations thereof, for the group of pixels; and adjusting values of one or more parameters for the group of pixels that correspond to the face image based on the detected skin tone.
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