ios--OpenCV--cvCompareHist使用直方图模型(CvHistogram)比对两张图片

此方法使用直方图模型比对两张图片，如果两张图片一模一样的话，结果为0.00；比对的结果越小，图片相似性越高;

适用于比较两张尺寸大小一致的图片，对于大小不一致的图片，只能比较其相似性；

-(double)CompareHist:(IplImage*)image1 withParam2:(IplImage*)image2
{
    int hist_size = 256;
    float range[] = {0,255};
    
    IplImage *gray_plane = cvCreateImage(cvGetSize(image1), 8, 1);
    cvCvtColor(image1, gray_plane, CV_BGR2GRAY);
    CvHistogram *gray_hist = cvCreateHist(1, &hist_size, CV_HIST_ARRAY);
    cvCalcHist(&gray_plane, gray_hist);
    
    IplImage *gray_plane2 = cvCreateImage(cvGetSize(image2), 8, 1);
    cvCvtColor(image2, gray_plane2, CV_BGR2GRAY);
    CvHistogram *gray_hist2 = cvCreateHist(1, &hist_size, CV_HIST_ARRAY);
    cvCalcHist(&gray_plane2, gray_hist2);
    
    return cvCompareHist(gray_hist, gray_hist2, CV_COMP_BHATTACHARYYA);
}

ios--OpenCV--cvCompareHist使用直方图模型(CvHistogram)比对两张图片,布布扣,bubuko.com

ios--OpenCV--cvCompareHist使用直方图模型(CvHistogram)比对两张图片

原文：http://blog.csdn.net/wanggsx918/article/details/23340685