发明名称 |
Light source estimating device, light source estimating method, and imaging device and image processing method |
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 calorimetrically 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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申请公布号 |
US2006103728(A1) |
申请公布日期 |
2006.05.18 |
申请号 |
US20050534432 |
申请日期 |
2005.11.14 |
申请人 |
ISHIGAMI KOICHIRO;KATOH NAOYA |
发明人 |
ISHIGAMI KOICHIRO;KATOH NAOYA |
分类号 |
H04N9/04;H04N17/00;H04N1/46;H04N1/60;H04N9/64;H04N9/73;H04N101/00 |
主分类号 |
H04N9/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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