使用VC实现基于直方图的相对辐射校正

Relative Radiometric Correction with VC Program based on Histogram Matching Method

在对两幅图像提取变化信息时,经常需要首先将它们的亮度色调等调整为一致(即进行相对辐射校正),直方图匹配法就是这样一种常用的调整方法。该文章对直方图匹配的原理和用VC编程对其实现的方法进行了介绍并对程序的实现结果进行了实验分析。通过分析结果可以看出,直方图匹配后的变化检测结果较匹配以前有了质的提升,说明使用该方法进行相对辐射校正效果还是比较好的。同时也说明了变化检测之前进行相对辐射校正的必要性。

In the detections of two images change information, we often need to adjust the brightness and the colors at first to make sure the two pictures are almost the same in the radiation (which was called relative radiometric correction), and histogram matching method is one of such commonly used adjustment methods. The article elaborates the principle of histogram matching, its implementation using VC program and also expound some experimental analysis of the results. By analyzing the results we can see that the detection of changes after using histogram matching had qualitative improvement results than the ones not using that method. So it is effect to use this method to do the relative radiometric correction. At the same time, the experiments illustrate the importance of doing relative radiometric correction before change detection.