1 #define CV_NO_BACKWARD_COMPATIBILITY
11 IplConvKernel* element = 0;
12 int element_shape = CV_SHAPE_RECT;
14 //the address of variable which receives trackbar position update
16 int open_close_pos = 0;
17 int erode_dilate_pos = 0;
19 // callback function for open/close trackbar
20 void OpenClose(int pos)
22 int n = open_close_pos - max_iters;
23 int an = n > 0 ? n : -n;
24 element = cvCreateStructuringElementEx( an*2+1, an*2+1, an, an, element_shape, 0 );
27 cvErode(src,dst,element,1);
28 cvDilate(dst,dst,element,1);
32 cvDilate(src,dst,element,1);
33 cvErode(dst,dst,element,1);
35 cvReleaseStructuringElement(&element);
36 cvShowImage("Open/Close",dst);
39 // callback function for erode/dilate trackbar
40 void ErodeDilate(int pos)
42 int n = erode_dilate_pos - max_iters;
43 int an = n > 0 ? n : -n;
44 element = cvCreateStructuringElementEx( an*2+1, an*2+1, an, an, element_shape, 0 );
47 cvErode(src,dst,element,1);
51 cvDilate(src,dst,element,1);
53 cvReleaseStructuringElement(&element);
54 cvShowImage("Erode/Dilate",dst);
58 int main( int argc, char** argv )
60 char* filename = argc == 2 ? argv[1] : (char*)"baboon.jpg";
61 if( (src = cvLoadImage(filename,1)) == 0 )
64 printf( "Hot keys: \n"
65 "\tESC - quit the program\n"
66 "\tr - use rectangle structuring element\n"
67 "\te - use elliptic structuring element\n"
68 "\tc - use cross-shaped structuring element\n"
69 "\tSPACE - loop through all the options\n" );
71 dst = cvCloneImage(src);
73 //create windows for output images
74 cvNamedWindow("Open/Close",1);
75 cvNamedWindow("Erode/Dilate",1);
77 open_close_pos = erode_dilate_pos = max_iters;
78 cvCreateTrackbar("iterations", "Open/Close",&open_close_pos,max_iters*2+1,OpenClose);
79 cvCreateTrackbar("iterations", "Erode/Dilate",&erode_dilate_pos,max_iters*2+1,ErodeDilate);
85 OpenClose(open_close_pos);
86 ErodeDilate(erode_dilate_pos);
92 element_shape = CV_SHAPE_ELLIPSE;
93 else if( (char)c == 'r' )
94 element_shape = CV_SHAPE_RECT;
95 else if( (char)c == 'c' )
96 element_shape = CV_SHAPE_CROSS;
97 else if( (char)c == ' ' )
98 element_shape = (element_shape + 1) % 3;
102 cvReleaseImage(&src);
103 cvReleaseImage(&dst);
106 cvDestroyWindow("Open/Close");
107 cvDestroyWindow("Erode/Dilate");