OpenCV 实现自己的线性滤波器

 1 #include "opencv2/imgproc/imgproc.hpp"
 2 #include "opencv2/highgui/highgui.hpp"
 3 #include <stdlib.h>
 4 #include <stdio.h>
 5 
 6 using namespace cv;
 7 
 8 /** @函数main */
 9 int main ( int argc, char** argv )
10 {
11   /// 声明变量
12   Mat src, dst;
13 
14   Mat kernel;
15   Point anchor;
16   double delta;
17   int ddepth;
18   int kernel_size;
19   char* window_name = "filter2D Demo";
20 
21   int c;
22 
23   /// 载入图像
24   src = imread( argv[1] );
25 
26   if( !src.data )
27   { return -1; }
28 
29   /// 创建窗口
30   namedWindow( window_name, CV_WINDOW_AUTOSIZE );
31 
32   /// 初始化滤波器参数
33   anchor = Point( -1, -1 );
34   delta = 0;
35   ddepth = -1;
36 
37   /// 循环 - 每隔0.5秒，用一个不同的核来对图像进行滤波
38   int ind = 0;
39   while( true )
40     {
41       c = waitKey(500);
42       /// 按‘ESC‘可退出程序
43       if( (char)c == 27 )
44         { break; }
45 
46       /// 更新归一化块滤波器的核大小
47       kernel_size = 3 + 2*( ind%5 );
48       kernel = Mat::ones( kernel_size, kernel_size, CV_32F )/ (float)(kernel_size*kernel_size);
49 
50       /// 使用滤波器
51       filter2D(src, dst, ddepth , kernel, anchor, delta, BORDER_DEFAULT );
52       imshow( window_name, dst );
53       ind++;
54     }
55 
56   return 0;
57 }