Patent ID: 8736630
Filing Date: 2014-05-27
Classification: G06T,G09G,H04N

Abstract:
1. An image processing device, comprising: a first color space converter configured to convert externally supplied image data in an RGB colorimetric system into first XYZ data which is image data in an XYZ colorimetric system; an XYZ data converter configured to generate second XYZ data which is image data in the XYZ colorimetric system by performing predetermined conversion processing to values of X, Y, and Z as tristimulus values that constitute the first XYZ data; and a second color space converter configured to convert the second XYZ data into image data in the RGB colorimetric system, wherein the XYZ data converter is configured to perform the conversion processing to the values of X, Y, and Z such that a color reproduction range obtained by the second XYZ data is wider than a color reproduction range obtained by the first XYZ data and wherein when performing the conversion processing to data of each pixel included in the first XYZ data, on an xy chromaticity diagram, the XYZ data converter obtains a first coordinate, a second coordinate, and a third coordinate, the first coordinate being a chromaticity coordinate for data of the corresponding pixel, the second coordinate being a chromaticity coordinate of an intersection point between a straight line for conversion and a line defining the color reproduction range obtained by the first XYZ data, the third coordinate being a chromaticity coordinate of an intersection point between the straight line for conversion and a line defining the color reproduction range obtained by the second XYZ data, the straight line for conversion passing through a predetermined reference coordinate and the first coordinate, and obtains a value of a fourth coordinate such that a proportion of a distance between the reference coordinate and the first coordinate to a distance between the reference coordinate and the second coordinate becomes equal to a proportion of a distance between the reference coordinate and the fourth coordinate to a distance between the reference coordinate and the third coordinate and the fourth coordinate corresponds to a chromaticity coordinate on the straight line for conversion when a chromaticity coordinate for data after the conversion processing to the data of the corresponding pixel is defined as the fourth coordinate.