Patent ID: 6999133

Claim:
A digital correction module for video projectors, designed to give non-linear re-imaging of an image in such a manner that it appears correctly on a non-ideal screen (curved screen), where a correction module is arranged in each of a plurality of video projectors after a common image source in order to create a large projected image of said image source, which projected image is composed of several frames, characterised in that the correction module includes a sequencer, a pixel write control in data communication with the sequencer, a parameter storage unit in data communication with the sequencer, a read address generator in data communication with the parameter storage unit, a coefficient generator in data communication with the parameter storage unit, a scaling generator in data communication with the parameter storage unit, an adder in data communication with the read address generator, a pixel storage unit in data communication with the adder, vertical mixers in data communication with the coefficient generator, a horizontal mixer in data communication with the coefficient generator, and a look-up function device in data communication with the horizontal mixer, for correction of differences in the boundary areas of the images of the respective projectors, by performing at least one of geometry correction, soft transition tuning, vignette correction or gamma correction.