多投影面沉浸式虚拟环境系统的颜色校正

Color Calibration of Multi-projection Immersive Virtual Environment Systems

提出一种颜色校正的函数逼近优化模型来解决多投影面沉浸式虚拟环境系统的颜色校正问题。该颜色校正模型,采用数码相机作为颜色反馈的测量仪器,获得一个基准投影面的亮度和色度转换函数;为其他投影面分别寻找一个亮度修正函数和色度修正函数,使得各投影面与基准投影面的亮度和色度转换函数之间的L2距离最小,进而根据各修正函数来补偿各投影机的输入响应差别以达到它们之间的颜色一致。给出了逼近校正方法的算法及其程序实现,通过一个三通道的试验系统,证明了此方法对解决多投影面沉浸式虚拟环境系统颜色校正问题的有效性。

This paper proposes a kind of function approximation optimization model to solve the color calibration problem of multi-projection immersive virtual environment systems. This color calibration model adopts a digital camera as the color feedback instrument to obtain the luminance transfer function and the chrominance transfer function of a base projection, and then finds a luminance amendment function and a chrominanee amendment function for all of the other projection, which makes the L2 distances about luminance transfer function and chrominance transfer function between the based projection and the calibrated projection be minimal. It compensates the difference of projectors input response according to these amendment functions to deal with the color continuity of the display. It gives out the approximation correction algorithms and its program implementation. Using a three-channel experimental systems, it shows the method is effective for the color calibration problem of multi-projection immersive virtual environment systems.