1 /** 2 * @function EqualizeHist_Demo.cpp 3 * @brief Demo code for equalizeHist function 4 * @author OpenCV team 5 */ 6 7 #include "opencv2/imgcodecs.hpp" 8 #include "opencv2/highgui/highgui.hpp" 9 #include "opencv2/imgproc/imgproc.hpp" 10 #include <iostream> 11 #include <stdio.h> 12 13 using namespace cv; 14 using namespace std; 15 16 /** 17 * @function main 18 */ 19 int main( int, char** argv ) 20 { 21 Mat src, dst; 22 23 const char* source_window = "Source image"; 24 const char* equalized_window = "Equalized Image"; 25 26 /// Load image 27 src = imread( argv[1], 1 ); 28 29 if( src.empty() ) 30 { cout<<"Usage: ./Histogram_Demo <path_to_image>"<<endl; 31 return -1; 32 } 33 34 /// Convert to grayscale 35 cvtColor( src, src, COLOR_BGR2GRAY ); 36 37 /// Apply Histogram Equalization 38 equalizeHist( src, dst ); 39 40 /// Display results 41 namedWindow( source_window, WINDOW_AUTOSIZE ); 42 namedWindow( equalized_window, WINDOW_AUTOSIZE ); 43 44 imshow( source_window, src ); 45 imshow( equalized_window, dst ); 46 47 /// Wait until user exits the program 48 waitKey(0); 49 50 return 0; 51 52 } 53
