多通道视景仿真投影系统交互式几何校正技术

An Interactive Warping Method for Multi-channel Visual Simulation System

为了简洁高效地解决多通道视景仿真系统投影图像的几何校正问题,提高几何校正精度,提出一种针对曲面屏幕的交互式几何校正技术.利用曲面屏幕的深度特性,以十分便捷的交互方法对现场每台投影机进行直接线性定标,再结合视景仿真系统相应通道的视锥信息自动计算该通道投影图像的几何校正网格.在系统定标中不需要辅助相机,只利用显示对象作为定标参照物,使估算的投影机模型参数更为优化,同时大大降低了系统安装调试的复杂度,提高了投影图像几何校正的效率和精度.实例结果表明,文中方法在实际应用中取得了良好效果,其计算结果还可为电子或光学边缘融合提供形状因子.

We present an interactive warping method for multi-channel visual simulation systems, which calibrates each projector based on depth information of the curve screen in a very simple interactive way, and then automatically calculates the warping mesh for each projection channel by taking corresponding design eye-point （DEP） and viewing frustum information into account. The method does not need any camera for projector calibration. By using the display target （the screen） itself as the calibration reference object, the projector＇s parameters can be estimated more accurately. This method largely reduces system setup complexity and improves system geometry correction efficiency and accuracy. Field engineering has shown very good warping results with this method. In addition, results of this method can also provide form factors for optical/electronic edge blending.