Invention Grant
- Patent Title: Automatic white balance based on dynamic mapping
- Patent Title (中): 基于动态映射的自动白平衡
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Application No.: US13890106Application Date: 2013-05-08
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Publication No.: US08854709B1Publication Date: 2014-10-07
- Inventor: Chengming Liu , Changmeng Liu , Jizhang Shan
- Applicant: OmniVision Technologies, Inc.
- Applicant Address: US CA Santa Clara
- Assignee: OmniVision Technologies, Inc.
- Current Assignee: OmniVision Technologies, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Blakely Sokoloff Taylor & Zafman LLP
- Main IPC: H04N1/46
- IPC: H04N1/46 ; H04N9/73 ; H04N1/407

Abstract:
A method of white balancing an image includes mapping pixels of the image to a color space diagram. Each of the pixels of the image include a red (“R”), a green (“G”), and a blue (“B”) subvalue. A first central tendency of each of the RGB subvalues of pixels mapped in a first pre-defined region of the color space diagram is determined and a second central tendency of each of the RGB subvalues of pixels mapped in a second pre-defined region of the color space diagram is determined. The first pre-defined region is associated with a first illuminating source and the second pre-defined region is associated with a second illuminating source. RGB values of a white pixel are generated based on the first and second central tendencies.
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