发明公开
- 专利标题： LIGHT SOURCE ESTIMATING DEVICE, LIGHT SOURCE ESTIMATING METHOD, AND IMAGING DEVICE AND IMAGE PROCESSING METHOD
- 专利标题（中）： 设备和方法确定的光源，图像设备和图像处理
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申请号： EP03772709.6申请日： 2003-11-12
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公开(公告)号： EP1583371A1公开(公告)日： 2005-10-05
- 发明人: ISHIGAMI, Koichiro , KATO, Naoya
- 申请人： SONY CORPORATION
- 申请人地址： 7-35, Kitashinagawa 6-chome, Shinagawa-ku Tokyo 141-0001 JP
- 专利权人： SONY CORPORATION
- 当前专利权人： SONY CORPORATION
- 当前专利权人地址： 7-35, Kitashinagawa 6-chome, Shinagawa-ku Tokyo 141-0001 JP
- 代理机构： DeVile, Jonathan Mark
- 优先权： JP2002328719 20021112
- 国际公布： WO2004045219 20040527
- 主分类号： H04N9/64
- IPC分类号： H04N9/64
摘要：
A light source estimation method of this invention estimates from the sensor response the color characteristics of an unknown light source of an image-pickup scene, in order to improve white balance adjustment and other aspects of the quality of color reproduction; a projection conversion portion 6 projects sensor response values 5 into an image distribution 9 in an evaluation space not dependent on the image-pickup light source 2 using parameters obtained by operations which can be colorimetrically approximated from spectral sensitivity characteristics of image-pickup unit 4, which are known, and from spectral characteristics of an assumed test light source 1; an evaluation portion 10 evaluates the correctness of a plurality of the test light sources 1 based on the distribution state of sample values of the projected scene; and accordingly, the correct image-pickup light source 2 is estimated.
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