Research On The Detection And Calibration Of Projection Soft Screen Distortion

With the continuous development and innovation of the projection display technology, Application of the display system requirements are getting higher and higher. This paper has special film projects as the background, The project is a large soft-screen projection for the materials. In the soft-screen rear projection structure, projected image will be distorted due to the sag of the soft curtain. In this paper we will realize the compensation of the image distortion caused by the soft screen through the projection screen texture distortion correction.In this paper, we introduce programmable GPU to help computing, using CPU + GPU approach to solve the problem. To improve the speed, the image pre-processing, spatial transform such as the vertices for the operation of the image will be realized on GPU which has the capability of parallel processing. The paper details the camera calibration, three-dimensional reconstruction based on coded structured light, geometric correction and other related algorithm design, on this basis, we have basically achieved the detection and correction work of the soft screen projection.