Patent ID: 9602696
Date: 2017-03-21
CPC Classifications: G06T,H04N

Claim:
1. A method for color conversion using a color conversion device, the color conversion device including a first conversion unit configured to convert gradation values of an image and a second conversion unit in which conversion values are stored at lattice points, wherein the lattice points divide a color space into segments having predetermined gradation intervals, the color space having a predetermined number of gradation values for each of multiple colors, wherein the predetermined gradation intervals are intervals between the lattice points, the method comprising: a step of dividing one of input gradations and output gradations of gradation characteristics into gradation segments having the predetermined gradation intervals, wherein the input gradations and the output gradations comprise respective gradation values, wherein the input gradations are represented by inputted video signals, and wherein the gradation characteristics are color characteristics of any display device to be emulated; a step of correcting, for each of the gradation segments, each of the gradation values of the other gradations of the gradation characteristics by multiplying a coefficient so that gradation intervals of the other gradations become equal or proportional to the predetermined gradation intervals; a step of converting, by the first conversion unit, the gradation values of the image using the corrected gradation values; and a step of color-converting the image using the gradation values converted by the first conversion unit and the conversion values stored at the lattice points of the second conversion unit.