app source code

1 module app;
2 import std.stdio;
3 import std.format;
4 import std.random;
5 
6 import opencvd;
7 
8 // https://docs.opencv.org/4.1.0/df/d5e/samples_2cpp_2tutorial_code_2ImgProc_2Morphology_1_8cpp-example.html
9 // tested and working!
10 
11 Mat src, erosion_dst, dilation_dst;
12 int erosion_elem = 0;
13 int erosion_size = 0;
14 int dilation_elem = 0;
15 int dilation_size = 0;
16 int max_elem = 2;
17 int max_kernel_size = 21;
18 
19 int main()
20 {
21   erosion_dst = newMat();
22   dilation_dst = newMat();
23     
24   src = imread( "LinuxLogo.jpg", IMREAD_COLOR );
25   if( src.isEmpty() )
26   {
27     "Could not open or find the image!".writeln;
28     return -1;
29   }
30   namedWindow( "Erosion Demo", WINDOW_AUTOSIZE );
31   namedWindow( "Dilation Demo", WINDOW_AUTOSIZE );
32   moveWindow( "Dilation Demo", src.cols, 0 );
33   createTrackbar( "Element:\n 0: Rect \n 1: Cross \n 2: Ellipse", "Erosion Demo",
34           &erosion_elem, max_elem,
35           cast(TrackbarCallback)(&Erosion));
36   createTrackbar( "Kernel size:\n 2n +1", "Erosion Demo",
37           &erosion_size, max_kernel_size,
38           cast(TrackbarCallback)(&Erosion));
39   createTrackbar( "Element:\n 0: Rect \n 1: Cross \n 2: Ellipse", "Dilation Demo",
40           &dilation_elem, max_elem,
41           cast(TrackbarCallback)(&Dilation));
42   createTrackbar( "Kernel size:\n 2n +1", "Dilation Demo",
43           &dilation_size, max_kernel_size,
44           cast(TrackbarCallback)(&Dilation));
45   Erosion( 0, null );
46   Dilation( 0, null );
47   waitKey(0);
48   return 0;
49 }
50 void Erosion( int, void* )
51 {
52   int erosion_type = 0;
53   if( erosion_elem == 0 ){ erosion_type = MORPH_RECT; }
54   else if( erosion_elem == 1 ){ erosion_type = MORPH_CROSS; }
55   else if( erosion_elem == 2) { erosion_type = MORPH_ELLIPSE; }
56   Mat element = getStructuringElement( erosion_type,
57                        Size( 2*erosion_size + 1, 2*erosion_size+1 ),
58                        Point( erosion_size, erosion_size ) );
59   erode( src, erosion_dst, element );
60   imshow( "Erosion Demo", erosion_dst );
61 }
62 void Dilation( int, void* )
63 {
64   int dilation_type = 0;
65   if( dilation_elem == 0 ){ dilation_type = MORPH_RECT; }
66   else if( dilation_elem == 1 ){ dilation_type = MORPH_CROSS; }
67   else if( dilation_elem == 2) { dilation_type = MORPH_ELLIPSE; }
68   Mat element = getStructuringElement( dilation_type,
69                        Size( 2*dilation_size + 1, 2*dilation_size+1 ),
70                        Point( dilation_size, dilation_size ) );
71   dilate( src, dilation_dst, element );
72   imshow( "Dilation Demo", dilation_dst );
73 }