High-efficiency processing method for spherical display and rotary output image of projector

Abstract

The invention relates to a high-efficiency processing method for a spherical display and rotary output image of a projector. The method comprises the following steps of: taking a planar rectangular image to be projected as a source image, taking a spherical display output image of the projector as a target image, establishing a source image coordinate system, a target image coordinate system and a spherical coordinate system, and dividing the target image into a plurality of grids; converting the pixel coordinates of the vertexes of the grids of the target image into three-dimensional coordinates under the spherical coordinate system, performing rotation transformation on the three-dimensional coordinates, and converting the three-dimensional coordinates into coordinates under a polar coordinate system; obtaining the pixel coordinates of the source image according to the coordinates under the polar coordinate system, taking the pixel coordinates as texture coordinates of the vertexes of the grids which correspond to the target image, taking the source image as a texture chartlet, and rendering and outputting the colors of the pixel points of the target image through the graphics processor of a graphics card according to the vertexes of the grids, the texture coordinates and the texture chartlet. According to the method, the spherical display effect of the projection on the spherical screen is improved, and the rotation efficiency of the spherical display can be improved through high-efficiency processing of the rotation image.

Description

technical field [0001] The invention relates to image processing technology, in particular to an efficient processing method for spherically displayed and rotated output images of a projector. Background technique [0002] The current spherical display technology uses computers, projectors, fisheye lenses and ball screens. The projection signal output by the computer is processed by the projector through imaging technology to become an image output, and the image output by the projector fills the entire ball through the fisheye lens. Screen, under normal circumstances, because the picture to be projected (which can be a video or a picture) output by the computer to the projector is a flat rectangular image, so the picture output by the projector is also a flat rectangular image, such as figure 1 As shown, if it is directly projected onto the dome screen through the fisheye lens, it will cause very large deformation due to the strong divergence characteristics of the fisheye ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the projector directly projects the received plane rectangular image onto the ball screen through the fisheye lens to cause obvious deformation in the existing spherical display technology, and provides an efficient processing method for spherical display and rotating output image of the projector, The image screen to be projected in the computer is deform

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