Patent ID: 8363267
Filing Date: 2013-01-29
Classification: H04N

Abstract:
1. An image forming apparatus, comprising: a scanning unit to scan an image and to output corresponding digital color coordinates; a determining unit to compute a matrix operation using a reference matrix computed from a standard color gamut and the digital color coordinates, and to determine a local color gamut including the digital color coordinates, from the standard color gamut including a plurality of local color gamuts using the result of the matrix operation; a matrix selecting unit to select a color conversion matrix that corresponds to the local color gamut, from color conversion matrices corresponding to the plurality of local color gamuts; a computing unit to compute LAB color coordinates based on the selected color conversion matrix and the digital color coordinates; a storage unit to pre-store the reference matrix and the color conversion matrices; and a color measuring unit to color-measure the image and to output corresponding color-measured LAB color coordinates, wherein the reference matrix represents a correlation between the color-measured LAB color coordinates and the digital color coordinates.