Patent ID: 7633647

Claim:
A method for color calibration of a color output device, comprising: producing a first output image with the device in response to an input signal from a test image, wherein the first test image includes at least one preselected color; measuring with a first sensor the image corresponding to the preselected color, said first sensor producing a first output indicating color information for at least the preselected color; producing a multi-dimensional LUT of the device representative of the color information including the at least one preselected color; producing a second output image with the device, wherein the second output image includes the at least one preselected color located at a plurality of spatial locations in the second output image; measuring with a second sensor the image at the plurality of spatial locations corresponding to the preselected color of the second output image, said second sensor producing a second output indicating reflectance information for at least the preselected color at the plurality of spatial locations; determining an error between the measured color of the one preselected color at a preselected pixel location and the reflectance information at other pixel locations within the plurality of spatial locations corresponding to the preselected color; adjusting the multi-dimensional LUT to minimize the spatial uniformity errors at the other pixel locations, thus calibrating the device color output spatially whereby the device expeditiously produces a more uniform color over a calibrated output image.