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 */
main(void)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 */
display_caption(const char * caption)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 */
display_dst(int delay)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
