摘要： 为解决曲面投影图像的几何失真和立体感畸变问题，设计并实现一个曲面多通道立体投影系统。该系统利用透视投影校正非线性失真，通过重投影变换对立体投影图像进行精确配准，基于NURBS曲面拟合得到投影形状的立体投影，采用图形处理单元的加速技术实现多通道间的实时边缘融合。实验结果表明，该系统具有较高的校正精度和较快的渲染速度。

关键词: 立体投影, 几何校正, 透视投影, 重投影变换, NURBS曲面

Abstract: This paper designs and complements a curved surface multi-channel stereoscopic projection system to correct geometric distortion in curved surface display system and provides high accurate registration in stereoscopic projection. It maps curved projection surface to the imaginary plane through perspective transformation, converts the plane to render coordinate through re-projection transformation. By constructing a NURBS surface according to the re-projection result, the geometric distortion and biases of stereo images can be resolved in an effective and accurate way. High-performance edge blending is achieved by using Graphics Processing Unit(GPU) accelerating technology. Experimental result indicates that the system has high calibration precision and rendering speed.

Key words: stereoscopic projection, geometric calibration, perspective projection, re-projection transformation, NURBS curved surface

中图分类号: 

• TN911.73