发明授权
US5940530A Backlit scene and people scene detecting method and apparatus and a
gradation correction apparatus
失效
背光场景和人物场景检测方法和装置以及灰度校正装置
- 专利标题： Backlit scene and people scene detecting method and apparatus and a gradation correction apparatus
- 专利标题（中）： 背光场景和人物场景检测方法和装置以及灰度校正装置
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申请号： US826333申请日： 1997-03-27
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公开(公告)号： US5940530A公开(公告)日： 1999-08-17
- 发明人: Tsumoru Fukushima , Haruo Yamashita , Katsuhiro Kanamori
- 申请人： Tsumoru Fukushima , Haruo Yamashita , Katsuhiro Kanamori
- 申请人地址： JPX Osaka-fu
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JPX Osaka-fu
- 优先权： JPX6-169084 19940721; JPX6-198308 19940823
- 主分类号： G06T5/40
- IPC分类号： G06T5/40 ; H04N1/407 ; H04N1/60 ; H04N1/62
摘要：
An apparatus for printing video images is disclosed. First the percentage of backlighting or people in the image is detected. That is, the probability of the presence of backlighting or people is detected. Then, the density gradation table is modified based on the detection result, and the presence of backlighting or the presence of people in the image is evaluated based on optical information, to select the best density gradation table from among plural density gradation tables, or to synthesize the best density gradation table. A luminance table is generated using the optimized density gradation table, and gradation correction of the image is then accomplished using that luminance table.
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