Invention Grant
- Patent Title: Joint enhancement of lightness, color and contrast of images and video
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Application No.: US12286317Application Date: 2008-09-30
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Publication No.: US08477247B2Publication Date: 2013-07-02
- Inventor: Abhijit Sarkar , Jorge E. Caviedes , Mahesh Subedar
- Applicant: Abhijit Sarkar , Jorge E. Caviedes , Mahesh Subedar
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Trop, Pruner & Hu, P.C.
- Main IPC: H04N9/68
- IPC: H04N9/68

Abstract:
In some embodiments, color and contrast enhancement video processing may be done in one shot instead of adjusting one of color and contrast enhancement, then the other, and then going back to the first one to readjust because of the second adjustment. In some embodiments, global lightness adjustment, local contrast enhancement, and saturation enhancement may be done at the same time and in parallel. Lightness adjustment improves visibility of details for generally dark or generally light images without changing intended lighting conditions in the original shot, and is used to enhance the range of color/saturation enhancement. Local contrast enhancement done in parallel improves visual definition of objects and textures and thus local contrast and perceived sharpness.
Public/Granted literature
- US20100085487A1 Joint enhancement of lightness, color and contrast of images and video Public/Granted day:2010-04-08
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