Patent ID: 6642957
Filing Date: 2003-11-04
Classification: H04N

Abstract:
A color signal processing circuit, comprising:an input for supplying a color signal formed of red, green and blue color signals that are color-separated from an image signal produced by a solid-state imaging device; an amplifier having respective gains for amplifying said red, green and blue color signals; a pull-in determining circuit for first determining if the color signal, as projected onto a two-dimensional coordinate system, is positioned within a first pull-in region and if it is determined that said color signal is positioned within said first pull-in region, then second determining if the color signal is positioned within a second pull-in region, said first pull-in region containing said second pull-in region, and both said first and second pull-in regions containing the origin of said two-dimensional coordinate system which represents a white color, said pull-in determining circuit additionally determining the pull-in for said color signal to be white-balanced and processed as a white color; and a gain adjustment circuit for adjusting the respective gains of said amplifier so as to pull in the projected color signal toward said origin.