void CFpOpencvTestDlg::OnBnClickedBtnStep2()
{
    CString InputImagePath = "D:\\Images\\1.jpg";    
    CString OutputImagePath("D:\\Images\\8.jpg");

    IplImage * image= cvLoadImage(InputImagePath);
    IplImage* eqlimage=cvCreateImage(cvGetSize(image),image->depth,3);
    //分别均衡化每个信道
    IplImage* redImage  =cvCreateImage(cvGetSize(image),image->depth,1);
    IplImage* greenImage=cvCreateImage(cvGetSize(image),image->depth,1);
    IplImage* blueImage =cvCreateImage(cvGetSize(image),image->depth,1);
    cvSplit(image,blueImage,greenImage,redImage,NULL);

    cvEqualizeHist(redImage,redImage);
    cvEqualizeHist(greenImage,greenImage); 
    cvEqualizeHist(blueImage,blueImage); 
    //均衡化后的图像
    cvMerge(blueImage,greenImage,redImage,NULL,eqlimage);

    //保存图片  
    cvSaveImage(OutputImagePath, eqlimage);  
}