Chrominance signal processing apparatus, image-sensing apparatus and control methods for same

摘要

The present invention relates to a chrominance signal processing apparatus (510) and method for providing optimal color processing according to the hue of the color image data. Red, green and blue signals are input to a chroma composition ratio determination circuit (550) that generates and outputs the RGB color composition ratio ( alpha : beta : gamma ). A chroma suppression luminance signal generating circuit (560) then generates a chroma suppression luminance signal Ya based on the RGB signals and the color composition ratio. A chroma suppression gain determination circuit (570) outputs the gain for the chroma suppression luminance signal based on a table in which output gain setting values corresponding to the chroma suppression luminance signals are recorded. Multipliers (581, 582) then multiply input color-difference signals Cr, Cb by the gain and output a suppressed color-difference signals (Cr x G, Cb x G) according to the color composition ratio ( alpha : beta : gamma ) <IMAGE>