多通道曲面投影的B样条几何校正

Geometric Correction of Multi-Channel Surface Projection Based on B-Spline

为了实现快速低成本多通道曲面投影几何校正,提出使用带形状参数的二次准均匀B样条来重构曲面屏幕。该方法首先通过调节控制点位置来使投影画面贴合曲面屏幕,以消除非平面屏幕所产生的几何失真,并使相邻通道融合区域的控制网格之间大致重合。再调整形状参数使融合区域的控制网格达到像素级别的重合。最后使用纹理贴图的方式呈现。多通道曲面投影系统实验结果表明,该方法简单高效,人机交互性好,具有良好的应用价值与广阔的市场前景。

In order to realize fast low-cost multi-channel curved projection geometric correction, a quadratic quasi- uniform B-spline with shape parameters was proposed to reconstruct a curved surface screen. In the method, the position of the control point was adjusted to fit the projection screen to the curved screen so as to eliminate the geometric distortion caused by the non-planar screen and make the control grids of the merged regions of the adjacent channels roughly coincide. Then, the shape parameters were adjusted so that the control area of the fusion area can reach the pixel-level coincidence. Finally, it was presented with texture maps. The experimental results of the multi-channel curved surface projection system show that the method is simple and efficient, with superior man-machine interaction, outstanding application value and broad market prospects.