OpenCV学习之直方图均衡化

//直方图均衡化
#include "cv.h"
#include "highgui.h"
int main(int argc, char** argv)
{
int i;
IplImage* src = cvLoadImage("Lena.tiff", 1);
IplImage* imgChannel[4] = { 0, 0, 0, 0 };
IplImage* dst = cvCreateImage(cvGetSize(src), IPL_DEPTH_8U, 3);

if (src)
{
for (i = 0; i < src->nChannels; i++)
{
imgChannel[i] = cvCreateImage(cvGetSize(src), IPL_DEPTH_8U, 1);  //要求单通道图像才能直方图均衡化
}
//通道分离
cvSplit(src, imgChannel[0], imgChannel[1], imgChannel[2], imgChannel[3]);//BGRA
for (i = 0; i < dst->nChannels; i++)
{
//直方图均衡化，原始图像和目标图像必须是单通道
cvEqualizeHist(imgChannel[i], imgChannel[i]);
}

//通道组合
cvMerge(imgChannel[0], imgChannel[1], imgChannel[2], imgChannel[3], dst);
cvNamedWindow("src", 1);
cvShowImage("src", src);
cvNamedWindow("Equalize", 1);
cvShowImage("Equalize", dst);

cvWaitKey(0);
//释放资源
for (i = 0; i < src->nChannels; i++)
{
if (imgChannel[i])
{
cvReleaseImage(&imgChannel[i]);
//imgChannel[i] = 0;
}
}
cvReleaseImage(&dst);
}

return 0;
}