一种基于标准白板的颜色校正方法

本研究提出了一种基于标准白板的颜色校正方法。首先制作一块标准白板。在标准色温下拍摄附带标准白板的景物,得到标准图像,通过程序统计出图像中白板区域的RGB三色的各自均值,作为颜色校正的基准值。同样,得到在非标准色温下白板区域的RGB三色的各自均值。两组值相比较,得到非标准图像RGB三色各自的校正系数,然后按此系数对整个图像的每个象素进行校正。试验结果表明,校正图像与标准图像不仅在视觉上可达到一致,并且在数值上也能达到基本一致,该方法通过计算机编程来实现简单实用,快速准确。

A color correction method based on standard white board

A color correction method is proposed in this study.First,a standard white board as a part of the background when digital images are acquired should be made.By computer processing the image which is acquired at standard color temperature,the RGB(Red,Green,Blue) elements of the board respective average value are obtained.The three values are the standard values.In the same way,three nonstandard values at nonstandard color temperature are determined.The two group values are compared to get correctional proportions of the image's RGB values.The proportions are used to correct each pixel of the whole image.The results show that the correction image is almost the same as the standard image.The method is simple,quick and accurate,which is carried out by computer programs.