Patent ID: 7196724
Filing Date: 2007-03-27
Classification: H04N

Abstract:
1. An image signal processing device that processes an image signal constituting a subject image captured at an image-capturing element, comprising: an average calculating unit that calculates pixel output averages for individual colors in each of a plurality of partition areas into which a light-receiving surface of the image-capturing element is divided based upon the image signal; an average ratio calculating unit that calculates a ratio of the pixel output average corresponding to another color to the pixel output average of a reference color for each partition area; a hue detecting unit that detects a hue of each partition area based upon the ratio of the pixel output averages; an area extraction unit that extracts any partition area with a hue manifesting a frequency equal to or lower than a predetermined frequency value from the plurality of partition areas based upon a hue frequency distribution among the plurality of partition areas; and a white balance adjustment unit that performs white balance adjustment based upon pixel outputs corresponding to individual colors from the extracted area.