opencv读取RGB分量并且显示

#include "opencv/cv.h"  
#include "opencv/highgui.h"  
  
int main(int argc,char** argv)  
{  
    IplImage* src = cvLoadImage("C:\\testphoto\\tree.jpg");//ÔØÈëͼÏñ  
      
    //Allocate individual image planes  
    IplImage* channel_r = cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,1);  
    IplImage*  channel_g = cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,1);  
    IplImage*  channel_b = cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,1);  
    IplImage* img_r = cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,3);  
    IplImage* img_g = cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,3);  
    IplImage* img_b = cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,3);  
      
    cvSplit(src, channel_b, channel_g, channel_r,NULL);  
    cvMerge(channel_b,0,0,0,img_b);  
    cvMerge(0,channel_g,0,0,img_g);  
    cvMerge(0,0,channel_r,0,img_r);  
     
    cvNamedWindow("src",0);  
    cvNamedWindow("Image_B",0);  
    cvNamedWindow("Image_G",0);  
    cvNamedWindow("Image_R",0);  
      
    cvShowImage( "src", src);  
    cvShowImage( "Image_B",  img_b);  
    cvShowImage( "Image_G",  img_g);  
    cvShowImage( "Image_R",  img_r);