Patent ID: 7148902
Filing Date: 2006-12-12
Classification: G01J,G09G

Abstract:
1. A method for transforming a device-dependent color value in a device-dependent color space of a display device to a perceptually linear color value in a perceptually linear color space, the method comprising: a first determining step of determining a first color value in a perceptually linear color space, by applying a matrix model to the device-dependent color value to obtain an XYZ color value in an XYZ color space, the matrix model applying a tone curve correction and a tristimulus matrix to the device-dependent color value, and by converting the XYZ color value into the first color value using a color space converter; a second determining step of determining a difference value in the perceptually linear color space, wherein the difference value is determined by applying a difference model to the device-dependent color value, and wherein the difference model models deviation of the matrix model from actual measurements of the display device; and an adding step of adding the difference value and the first color value to obtain the perceptually linear color value.