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几何失真校正技术是虚拟现实投影系统中的关键技术之一.该文以CDZS柱面塔台模拟机为基础,提出一种在极坐标系中基于投影承接面几何特征的帧缓存纹理重映射技术来实现几何校正的方法,该方法采用角等分原则将二维纹理网格化后在三维坐标系中进行映射从而实现几何校正,并可以推广到投影面为球面、极坐标参数曲面等情况.试验结果表明该方法能够快速的完成几何畸变校正和通道间的无缝拼接融合,具有良好的实际应用价值.“,”Calibration of geometrical distortion is one of the key technologies for virtual reality projection system.A new algorithm was proposed based on CDZS cylindrical tower simulator,which is based on geometrical characteristics of screens and buffer texture remapping in polar coordinates to correct geometrical distortion.By mapping an average angle-divided grid to the three-dimensional display surface,the algorithm can realize geometrical calibration for large-scale display systems with curved screens and oblique projectors.Experimental results indicate that the new solution could complete the geometric distortion correction and channel seamless integration quickly and is both effective and valuable in distributed curved surface projection system.