直方图比较

#include<iostream>
#include<opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main(int argc, char**argv)
{
    Mat  base,test1,test2;
    base=imread("C:/Users/hs769/Desktop/1.jpg");
    test1 = imread("C:/Users/hs769/Desktop/2.jpg");
    imshow("demo", base);

    //cvtColor(base, test1, COLOR_RGB2GRAY);
    cvtColor(test1, test1, COLOR_RGB2HSV);
    cvtColor(base, test2, COLOR_RGB2HSV);

    int h_bin = 50;
    int s_bin = 60;
    int histSize[] = { h_bin,s_bin };
    float h_range[] = { 0,180 };
    float s_range[] = { 0,256 };

    const float *range[] = { h_range,s_range };

    int channels[] = { 0,1 };
    MatND hist_test1;
    MatND hist_test2;


    calcHist(&test1, 1, channels, Mat(), hist_test1, 2, histSize, range, true, false);
    normalize(hist_test1, hist_test1, 0, 1, NORM_MINMAX, -1, Mat());

    calcHist(&test2, 1, channels, Mat(), hist_test2, 2, histSize, range, true, false);
    normalize(hist_test2, hist_test2, 0, 1, NORM_MINMAX, -1, Mat());

    double test1test2 = compareHist(hist_test1, hist_test2, HISTCMP_CORREL);
    cout << "method1 value" << test1test2 << endl;

    waitKey(0);
    return 0;
}