Digital camera, gain-computing device and method

Television – Camera – system and detail – Combined image signal generator and general image signal...

Reexamination Certificate

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C348S224100

Reexamination Certificate

active

07830419

ABSTRACT:
To determine a more appropriate WB gain. A first image data, which is obtained by way of photographing essentially the same subject as that of a main image intended by a user without firing a strobe light for preliminary illumination, and a second image data, which is obtained by way of photographing the same while firing the strobe light for preliminary illumination, are captured. Subsequently, a typical value of each of blocks constituting the first and second image data and the type of a light source of the same are acquired as block information. The thus-acquired pieces of block information about the first and second image data are compared with each other, to thus acquire the tendency of a color change in subject before and after preliminary illumination. An environment light source is estimated on the basis of the obtained tendency of a color change.

REFERENCES:
patent: 5808681 (1998-09-01), Kitajima
patent: 7286703 (2007-10-01), Kaku
patent: 7505069 (2009-03-01), Wang
patent: 2004/0001153 (2004-01-01), Kikukawa et al.
patent: 2004/0095478 (2004-05-01), Takano et al.
patent: 2006/0044422 (2006-03-01), Miyazaki
patent: 2006/0176379 (2006-08-01), Hyodo
patent: 2001-112019 (2001-04-01), None
patent: 2003-309854 (2003-10-01), None

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