发明授权
- 专利标题: Gamma correction method and system
- 专利标题(中): 伽马校正方法和系统
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申请号: US11295660申请日: 2005-12-07
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公开(公告)号: US07440015B2公开(公告)日: 2008-10-21
- 发明人: Li-Ming Chen , Cheng-Yu Wu
- 申请人: Li-Ming Chen , Cheng-Yu Wu
- 申请人地址: TW Hsinchu
- 专利权人: Sunplus Technology Co., Ltd.
- 当前专利权人: Sunplus Technology Co., Ltd.
- 当前专利权人地址: TW Hsinchu
- 代理机构: Bacon & Thomas, PLLC
- 优先权: TW94111625A 20050413
- 主分类号: H04N5/202
- IPC分类号: H04N5/202
摘要:
A gamma correction method and system, which performs a gamma correction on an n-bit video signal to thus generate a gamma correction value. At first, a first primary index and a first sub-index are obtained by performing an index mapping on a value of the video signal. Next, a first gamma value is obtained by performing a table lookup on the first primary index and the first sub-index. Next, a second primary index and a second sub-index are obtained by performing the index mapping on the first gamma value. Next, multiple thresholds are obtained by performing the table lookup on the second primary index and the second sub-index. Finally, the value of the video signal and the multiple thresholds are compared to accordingly correct the first gamma value and generate the gamma correction value.
公开/授权文献
- US20060244849A1 Gamma correction method and system 公开/授权日:2006-11-02
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