diff --git a/samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp b/samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp new file mode 100644 index 000000000..3bc60fefb --- /dev/null +++ b/samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp @@ -0,0 +1,89 @@ +/** + * @file compareHist_Demo.cpp + * @brief Sample code to use the function compareHist + * @author OpenCV team + */ + +#include "opencv2/highgui/highgui.hpp" +#include "opencv2/imgproc/imgproc.hpp" +#include +#include + +using namespace std; +using namespace cv; + +/** + * @function main + */ +int main( int argc, char** argv ) +{ + Mat src_base, hsv_base; + Mat src_test1, hsv_test1; + Mat src_test2, hsv_test2; + Mat hsv_half_down; + + /// Load three images with different environment settings + if( argc < 4 ) + { printf("** Error. Usage: ./compareHist_Demo \n"); + return -1; + } + + src_base = imread( argv[1], 1 ); + src_test1 = imread( argv[2], 1 ); + src_test2 = imread( argv[3], 1 ); + + /// Convert to HSV + cvtColor( src_base, hsv_base, CV_BGR2HSV ); + cvtColor( src_test1, hsv_test1, CV_BGR2HSV ); + cvtColor( src_test2, hsv_test2, CV_BGR2HSV ); + + hsv_half_down = hsv_base( Range( hsv_base.rows/2, hsv_base.rows - 1 ), Range( 0, hsv_base.cols - 1 ) ); + + /// Using 30 bins for hue and 32 for saturation + int h_bins = 50; int s_bins = 60; + int histSize[] = { h_bins, s_bins }; + + // hue varies from 0 to 256, saturation from 0 to 180 + float h_ranges[] = { 0, 256 }; + float s_ranges[] = { 0, 180 }; + + const float* ranges[] = { h_ranges, s_ranges }; + + // Use the o-th and 1-st channels + int channels[] = { 0, 1 }; + + + /// Histograms + MatND hist_base; + MatND hist_half_down; + MatND hist_test1; + MatND hist_test2; + + /// Calculate the histograms for the HSV images + calcHist( &hsv_base, 1, channels, Mat(), hist_base, 2, histSize, ranges, true, false ); + normalize( hist_base, hist_base, 0, 1, NORM_MINMAX, -1, Mat() ); + + calcHist( &hsv_half_down, 1, channels, Mat(), hist_half_down, 2, histSize, ranges, true, false ); + normalize( hist_half_down, hist_half_down, 0, 1, NORM_MINMAX, -1, Mat() ); + + calcHist( &hsv_test1, 1, channels, Mat(), hist_test1, 2, histSize, ranges, true, false ); + normalize( hist_test1, hist_test1, 0, 1, NORM_MINMAX, -1, Mat() ); + + calcHist( &hsv_test2, 1, channels, Mat(), hist_test2, 2, histSize, ranges, true, false ); + normalize( hist_test2, hist_test2, 0, 1, NORM_MINMAX, -1, Mat() ); + + /// Apply the histogram comparison methods + for( int i = 0; i < 4; i++ ) + { int compare_method = i; + double base_base = compareHist( hist_base, hist_base, compare_method ); + double base_half = compareHist( hist_base, hist_half_down, compare_method ); + double base_test1 = compareHist( hist_base, hist_test1, compare_method ); + double base_test2 = compareHist( hist_base, hist_test2, compare_method ); + + printf( " Method [%d] Perfect, Base-Half, Base-Test(1), Base-Test(2) : %f, %f, %f, %f \n", i, base_base, base_half , base_test1, base_test2 ); + } + + printf( "Done \n" ); + + return 0; +} diff --git a/samples/cpp/tutorial_code/images/hand_sample1.jpg b/samples/cpp/tutorial_code/images/hand_sample1.jpg new file mode 100644 index 000000000..830fbe74c Binary files /dev/null and b/samples/cpp/tutorial_code/images/hand_sample1.jpg differ diff --git a/samples/cpp/tutorial_code/images/hand_sample2.jpg b/samples/cpp/tutorial_code/images/hand_sample2.jpg new file mode 100644 index 000000000..ea0f5222e Binary files /dev/null and b/samples/cpp/tutorial_code/images/hand_sample2.jpg differ diff --git a/samples/cpp/tutorial_code/images/hand_sample3.jpg b/samples/cpp/tutorial_code/images/hand_sample3.jpg new file mode 100644 index 000000000..c6f6365dc Binary files /dev/null and b/samples/cpp/tutorial_code/images/hand_sample3.jpg differ