Patent ID: 8837021
Filing Date: 2014-09-16
Classification: H04N

Abstract:
1. An image processing apparatus comprising: a division unit constructed to divide an image into blocks each having a predetermined number of pixels; a pattern flag determination unit constructed to determine a pattern flag indicating a color layout of pixels for each of the blocks; a color determination unit constructed to determine, for each of the blocks, a representation color and other colors, wherein the other colors are different from the representation color; a holding unit constructed to hold, as compressed image data, the pattern flag determined by the pattern flag determination unit, the representation color, and the other colors determined by the color determination unit; a designation unit constructed to accept a designated color from a user; and a color conversion unit constructed to mono-colorize the compressed image data without decompressing the compressed image data by converting at least one of (a) the representation color and (b) one of the other colors into the designated color based on the pattern flag.