Propose and implement a large-screen projection splice method based on Bezier curves and cubic spline curve. The method can be used for passive stereo projection system. Construct the deformed surface for projection screen with Bezier curve, get the coordinates of surface grid nodes, and then segment the frame buffer, thus achieve the projection screen's geometric calibration by use of texture mapping. The method meets the requirements of stereo image pair grating alignment. Use cubic spline curve as the blending curve of splice image overlapping part. By frame buffer division and per-pixel processing, the blending purposes is achieved. Study the binocular stereo principle, realize the large-screen stereo projection splice by the mentioned method. Experiments on a three-channel stereo projection system show the method is simple and has good adaptability to engineering environment.
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