OpenCV 图像平滑处理

 1 #include "opencv2/imgproc/imgproc.hpp"
 2 #include "opencv2/highgui/highgui.hpp"
 3 
 4 using namespace std;
 5 using namespace cv;
 6 
 7 /// 全局变量
 8 int DELAY_CAPTION = 1500;
 9 int DELAY_BLUR = 100;
10 int MAX_KERNEL_LENGTH = 31;
11 
12 Mat src; Mat dst;
13 char window_name[] = "Filter Demo 1";
14 
15 /// 函数申明
16 int display_caption( char* caption );
17 int display_dst( int delay );
18 
19 /**
20  *  main 函数
21  */
22  int main( int argc, char** argv )
23  {
24    namedWindow( window_name, CV_WINDOW_AUTOSIZE );
25 
26    /// 载入原图像
27    src = imread( "../images/lena.jpg", 1 );
28 
29    if( display_caption( "Original Image" ) != 0 ) { return 0; }
30 
31    dst = src.clone();
32    if( display_dst( DELAY_CAPTION ) != 0 ) { return 0; }
33 
34    /// 使用 均值平滑
35    if( display_caption( "Homogeneous Blur" ) != 0 ) { return 0; }
36 
37    for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
38        { blur( src, dst, Size( i, i ), Point(-1,-1) );
39          if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }
40 
41     /// 使用高斯平滑
42     if( display_caption( "Gaussian Blur" ) != 0 ) { return 0; }
43 
44     for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
45         { GaussianBlur( src, dst, Size( i, i ), 0, 0 );
46           if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }
47 
48      /// 使用中值平滑
49      if( display_caption( "Median Blur" ) != 0 ) { return 0; }
50 
51      for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
52          { medianBlur ( src, dst, i );
53            if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }
54 
55      /// 使用双边平滑
56      if( display_caption( "Bilateral Blur" ) != 0 ) { return 0; }
57 
58      for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
59          { bilateralFilter ( src, dst, i, i*2, i/2 );
60            if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }
61 
62      /// 等待用户输入
63      display_caption( "End: Press a key!" );
64 
65      waitKey(0);
66      return 0;
67  }
68 
69  int display_caption( char* caption )
70  {
71    dst = Mat::zeros( src.size(), src.type() );
72    putText( dst, caption,
73             Point( src.cols/4, src.rows/2),
74             CV_FONT_HERSHEY_COMPLEX, 1, Scalar(255, 255, 255) );
75 
76    imshow( window_name, dst );
77    int c = waitKey( DELAY_CAPTION );
78    if( c >= 0 ) { return -1; }
79    return 0;
80   }
81 
82   int display_dst( int delay )
83   {
84     imshow( window_name, dst );
85     int c = waitKey ( delay );
86     if( c >= 0 ) { return -1; }
87     return 0;
88   }