Patent ID: 7679781
Filing Date: 2010-03-16
Classification: H04N

Abstract:
1. A color image processing apparatus that generates output gray level values (c 4 , m 4 , y 4 , k 4 ) of four colors including black from input gray level values (c 1 , m 1 , y 1 ) of three colors of cyan, magenta and yellow, the color image processing apparatus comprising: a minimum value selection unit that selects a minimum value k a first calculation unit that calculates a generation amount k a second calculation unit that calculates an under color removal amount u (k a third calculation unit that outputs a correction coefficient value f (k a subtraction unit that subtracts the under color removal amount u (k a multiplication unit that multiplies the output of the subtraction unit (c a significant bit selection unit that selects a significant bit of a multiplication result of the multiplication unit; and a gray level correction unit that makes a gray level correction to the generation amount k