1 /** 2 * file Smoothing.cpp 3 * brief Sample code for simple filters 4 * author OpenCV team 5 */ 6 #include <iostream> 7 #include <vector> 8 9 #include "opencv2/imgproc/imgproc.hpp" 10 #include "opencv2/imgcodecs.hpp" 11 #include "opencv2/highgui/highgui.hpp" 12 #include "opencv2/features2d/features2d.hpp" 13 14 using namespace std; 15 using namespace cv; 16 17 /// Global Variables 18 int DELAY_CAPTION = 1500; 19 int DELAY_BLUR = 100; 20 int MAX_KERNEL_LENGTH = 31; 21 22 Mat src; Mat dst; 23 char window_name[] = "Smoothing Demo"; 24 25 /// Function headers 26 int display_caption( const char* caption ); 27 int display_dst( int delay ); 28 29 30 /** 31 * function main 32 */ 33 int main( void ) 34 { 35 namedWindow( window_name, WINDOW_AUTOSIZE ); 36 37 /// Load the source image 38 src = imread( "../data/lena.jpg", 1 ); 39 40 if( display_caption( "Original Image" ) != 0 ) { return 0; } 41 42 dst = src.clone(); 43 if( display_dst( DELAY_CAPTION ) != 0 ) { return 0; } 44 45 46 /// Applying Homogeneous blur 47 if( display_caption( "Homogeneous Blur" ) != 0 ) { return 0; } 48 49 for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 ) 50 { blur( src, dst, Size( i, i ), Point(-1,-1) ); 51 if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } } 52 53 54 /// Applying Gaussian blur 55 if( display_caption( "Gaussian Blur" ) != 0 ) { return 0; } 56 57 for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 ) 58 { GaussianBlur( src, dst, Size( i, i ), 0, 0 ); 59 if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } } 60 61 62 /// Applying Median blur 63 if( display_caption( "Median Blur" ) != 0 ) { return 0; } 64 65 for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 ) 66 { medianBlur ( src, dst, i ); 67 if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } } 68 69 70 /// Applying Bilateral Filter 71 if( display_caption( "Bilateral Blur" ) != 0 ) { return 0; } 72 73 for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 ) 74 { bilateralFilter ( src, dst, i, i*2, i/2 ); 75 if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } } 76 77 /// Wait until user press a key 78 display_caption( "End: Press a key!" ); 79 80 waitKey(0); 81 82 return 0; 83 } 84 85 /** 86 * @function display_caption 87 */ 88 int display_caption( const char* caption ) 89 { 90 dst = Mat::zeros( src.size(), src.type() ); 91 putText( dst, caption, 92 Point( src.cols/4, src.rows/2), 93 FONT_HERSHEY_COMPLEX, 1, Scalar(255, 255, 255) ); 94 95 imshow( window_name, dst ); 96 int c = waitKey( DELAY_CAPTION ); 97 if( c >= 0 ) { return -1; } 98 return 0; 99 } 100 101 /** 102 * @function display_dst 103 */ 104 int display_dst( int delay ) 105 { 106 imshow( window_name, dst ); 107 int c = waitKey ( delay ); 108 if( c >= 0 ) { return -1; } 109 return 0; 110 } 111
