#include "highgui.h"
#include "cv.h"
#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")
int main( )
{
IplImage *src = cvLoadImage( "0.jpg", 1);
IplImage *dst;
IplImage *dst1;
IplImage *dst2;
IplImage *dst3;
dst1 = cvCreateImage(cvSize(src->width, src->height), IPL_DEPTH_8U, 1);
dst2 = cvCreateImage(cvSize(src->width, src->height), IPL_DEPTH_8U, 1);
dst3 = cvCreateImage(cvSize(src->width, src->height), IPL_DEPTH_8U, 1);
dst = cvCreateImage(cvSize(src->width, src->height), IPL_DEPTH_8U, 3);
cvSplit(src, dst1, dst2, dst3, 0);//分离RGB通道，分别得到BGR的单通道图像
cvMerge(dst1, dst2, dst3, 0, dst);//逆运算，将三通道图像融合得到彩色图像
cvNamedWindow("dst1",1);
cvShowImage("dst1",dst1);
cvNamedWindow("dst2",1);
cvShowImage("dst2",dst2);
cvNamedWindow("dst3",1);
cvShowImage("dst3",dst3);
cvNamedWindow("dst",1);
cvShowImage("dst",dst);
cvMoveWindow("dst1",100,100);
cvMoveWindow("dst2",200,200);
cvMoveWindow("dst3",300,300);
cvWaitKey(0);
//cvReleaseImage(&src);
cvReleaseImage(&dst1);
cvReleaseImage(&dst2);
cvReleaseImage(&dst3);
cvReleaseImage(&dst);
return 0;
}图像的通道分割和融合
原文：http://blog.csdn.net/lihuajie1003/article/details/41977289
