Color measurement and correction of multiple display devices

摘要

A system and method for measuring and then correcting the color response from multiple projectors or display devices so that the devices can generate a color response that is uniform. An area light sensor (such as a commodity camera) is used to measure the color responses of each display and then to derive a model of the color transfer function for each display using a pattern of predetermined areas or regions displayed on each display device.

主权项

1. A computer-automated method for color measurement and correction of multiple display devices comprising:
creating chits by generating a measurement pattern comprising display regions on each display device, wherein each of the chits comprises one of the display regions; establishing a correspondence between each of the chits and their location in a measurement camera so that when a particular chit is illuminated, corresponding pixels in the chit are measured in the camera by performing steps including: adjusting the effective shutter-speed of the camera based on expected exposure values and the colors to be measured; displaying one or more chits having a particular color value; measuring, in the camera, pixel values for pixels corresponding to each displayed chit; processing the pixel values in the camera for each chit to determine a set of measured color values each corresponding to the color displayed for each pixel in a respective chit; normalizing the measured color values based on the shutter speed being used to capture those color values, and repeating the color measurement process until all colors to be measured have been displayed.