Patent ID: 8705152

Claim:
A system including at least one processing device calibrating gray data, the system comprising: a transformation unit to transform red, green, and blue (RGB) data of a source device into transformed color data of a different color space using a color appearance model; and a calibration unit to adjust a chroma value of the gray data in the transformed color data, transformed into the different color space by the transformation unit transforming the gray data into the transformed color data, to a predetermined value to generate calibrated color space data of the gray data with removal of a color tone from the gray data, by moving the chroma value of the gray data by a mapping distance, wherein the adjusting the chroma value of the gray data includes moving each chroma value of the transformed color data with a respective brightness value, among brightness values, the same mapping distance, thereby maintaining the respective brightness value, such that when plural chroma values correspond to the respective brightness value, each of the plural chroma values is moved by the same mapping distance, resulting in the calibrated color space data of the gray data.