Patent ID: 6118550
Filing Date: 2000-09-12
Classification: H04N

Abstract:
An image processing apparatus comprising:a color separator for separator an inputted image into a plurality of colors for each pixel to generate color image data; QMYa maximum value detector for detecting a maximum value of the color image data;value of the color image data;a minimum value detector for detecting maximum value of the color image data; anda black generator for generating black data by using a difference between the maximum value and the minimum value of the color image data and the minimum value of the color image data as parameters to set an output value for the black data, wherein,a constant value storage unit for storing a predetermined constant value therein;a calculator for solving the equation (A) to determine the value K; andan output controller for setting the output value for the black data corresponding to the value K,K=min (C,M,Y) 1-[max (C,M,Y)-min (C,M,Y)wherein:C'M'Y: color image data of three primary colors, cyan (C), magenta (M), and yellow (Y);max(C,M,Y): maximum value of color image data;min(C,M,Y): minimum value of color image data; and.beta.: predetermined constant value.