公开(公告)号：EP1260097B1

公开(公告)日：2018-08-08

申请号：EP01951197.1

申请日：2001-01-25

Applicant: 3d Perception AS

Inventor： Knut Krogstad ,  Johan Henrik Litleskare

IPC: H04N5/74

CPC classification number: H04N9/3147 ,  H04N5/74 ,  H04N9/12 ,  H04N9/31 ,  H04N9/3185 ,  H04N2005/745 ,  H04N2005/7466

Abstract: Digital correction module for video projector where a correction module is provided to give a non-linear re-imaging of an image so that it is displayed correct on a non-ideal screen (curved screen) where a correction module is provided in each of a plurality of video projectors after a common image source in order to create a large, of several composite sub image, projected image of said image source. The correction module comprises a sequencer ( 1 ), a pixel write control ( 2 ), a parameter storage ( 7 ), a read address generator ( 13 ), a coefficient generator ( 5 ), a scaling generator ( 6 ), an adder ( 8 ), a pixel storage ( 3 ), a vertical mixer ( 9 ), a horizontal mixer ( 10 ) and a look up function means ( 12 ) for correction of differences in the border area of the image of the respective projectors such as geometry correction, soft transition tuning, vignette correction and gamma correction.