Opencv 直方图比较
#include <iostream>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;
Mat img1, img2, img3, img_result, img_gray1, img_gray2, img_gray3, img_hsv1,img_hsv2,img_hsv3;
MatND img_hist1,img_hist2,img_hist3;
char win1[] = "window1";
char win2[] = "window2";
char win3[] = "window3";
char win4[] = "window4";
char win5[] = "window5";
int threshold_value = 0;
int max_value = 255;
RNG rng(12345);
int Demo_Histogram_Compare();
string convertToString(double d);
int index = 0;
//Remap
int Demo_Histogram_Compare()
{
img1 = imread("D://images//lion-1.jpg");
img2 = imread("D://images//lion-4.jpg");
img3 = imread("D://images//lion-5.jpg");
if (img1.empty())
{
cout << "could not load image..." << endl;
return 0;
}
//imshow(win1, img1);
cvtColor(img1,img_hsv1,CV_BGR2HSV);
cvtColor(img2, img_hsv2, CV_BGR2HSV);
cvtColor(img3, img_hsv3, CV_BGR2HSV);
int h_bins = 10;
int s_bins = 12;
int histSize[] = {h_bins,s_bins};
float h_ranges[] = {0,180};
float s_ranges[] = {0,256};
const float *ranges[] = {h_ranges,s_ranges};
int channels[] = {0,1};
calcHist(&img_hsv1, 1, channels, Mat(), img_hist1, 2, histSize, ranges, true, false);
normalize(img_hist1, img_hist1, 0, 1, NORM_MINMAX, -1, Mat());
calcHist(&img_hsv2, 1, channels, Mat(), img_hist2, 2, histSize, ranges, true, false);
normalize(img_hist2, img_hist2, 0, 1, NORM_MINMAX, -1, Mat());
calcHist(&img_hsv3, 1, channels, Mat(), img_hist3, 2, histSize, ranges, true, false);
normalize(img_hist3, img_hist3, 0, 1, NORM_MINMAX, -1, Mat());
double img_1_c_1 = compareHist(img_hist1, img_hist1, CV_COMP_INTERSECT);
double img_1_c_2 = compareHist(img_hist1, img_hist2, CV_COMP_INTERSECT);
double img_1_c_3 = compareHist(img_hist1, img_hist3, CV_COMP_INTERSECT);
double img_2_c_3 = compareHist(img_hist2, img_hist3, CV_COMP_INTERSECT);
img2.copyTo(img_result);
putText(img1, convertToString(img_1_c_1), Point(50, 50), CV_FONT_HERSHEY_COMPLEX, 1, Scalar(0, 0, 255), 2, LINE_AA);
putText(img2, convertToString(img_1_c_2), Point(50, 50), CV_FONT_HERSHEY_COMPLEX, 1, Scalar(0, 0, 255), 2, LINE_AA);
putText(img3, convertToString(img_1_c_3), Point(50, 50), CV_FONT_HERSHEY_COMPLEX, 1, Scalar(0, 0, 255), 2, LINE_AA);
putText(img_result, convertToString(img_2_c_3), Point(50, 50), CV_FONT_HERSHEY_COMPLEX, 1, Scalar(0, 0, 255), 2, LINE_AA);
imshow(win1,img1);
imshow(win2,img2);
imshow(win3,img3);
imshow(win4, img_result);
return 0;
}
string convertToString(double d)
{
ostringstream os;
if (os<<d)
{
return os.str();
}
return "Invalid conversion...";
}
int main()
{
Demo_Histogram_Compare();
waitKey(0);
return 0;
}
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