Patent ID: 7639260

Claim:
A system for color correction, comprising: an output device to be color corrected; a target of patches, each patch in the target of patches having a respective known input value displayed on the output device, the target of patches comprising; at least one base patch having a predefined calibration input value; and a plurality of calibration patches comprising separate patches each having a respective input value corresponding to a different known respective luminance value different than the predefined calibration input value; a common digital camera capturing an image of the target of patches as rendered by the output device and providing image signals representative of the captured image of the target of patches; and a software calibration tool receiving the image signals, the software calibration tool performing: camera calibration of the common digital camera based upon a relationship between the image signals corresponding to the at least one base patch and the predefined calibration input value; calibrating the image signals corresponding to the calibration patches based upon the camera calibration to produce calibrated image signals; deriving a tone response calibration for the output device based upon a measured relationship between the calibrated image signals corresponding to the plurality of calibration patches, and the respective input value of each of the plurality of calibration patches; and color correcting, based upon the tone response calibration, the output device.