Multichannel LED dome screen geometric correction method

Abstract

The invention relates to a multichannel LED dome screen geometric correction method. The method comprises the following steps: step 1, obtaining a frame buffer texture image A of an RTT camera S1; step 2, acquiring a frame buffer texture image B of the camera in the step 2; step 3, defining a front-view matrix camera as S3; defining S3 projection matrix as a front view matrix, the window size being full screen size, defining a S3 view matrix as a unit matrix, adding a quadrilateral plane model to a front view matrix camera node, pasting the texture cache image B on the quadrilateral plane model, performing point extraction operation on the image B by adopting shader language programming, and finally outputting a display image C. According to the invention, a traditional projector projection screen is replaced by the multi-channel LED dome screen, so that the brightness and resolution uniformity of the whole picture are consistent; geometric correction is carried out through shader language programming to realize spatial transformation from a view cone plane point to a dome screen point, spatial restoration correction of the image is rapidly realized, the delay characteristic can bebasically ignored, and the stability is high.

Description

technical field [0001] The invention relates to a geometric correction method for a multi-channel LED ball screen, and belongs to the technical field of graphic image distortion and geometric correction. Background technique [0002] With the development of display technology, the small-pitch LED curved surface display technology has developed greatly, which has prompted the emergence of LED spherical display screens. Traditional flight simulator simulation imaging systems mostly use columnar screens, real image spherical belt screens, virtual image screens, etc., but they are inseparable from multiple projector display devices, and then through projection splicing, geometric correction and edge fusion technologies, finally present a A continuous and complete image frame. The emergence of small-pitch LED spherical display screens can eliminate projector equipment, and it is no longer necessary to solve problems such as projection splicing fusion, projector splicing light le...

AI Technical Summary

Problems solved by technology

[0003] Due to the natural defects in the design and production of multi-channel small-pitch LED dome screen display equipment, dome screens, resulting in dislocation of image display

The physical dislocation of the hardware display device cannot be solved. In order to display the image correctly, it is necessary to perform snapshot correction and space restoration correction on the displayed content. The final display image of the small-pitch LED dome screen needs to undergo multiple correction operations. There are deficiencies in resolution uniformity and stability

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