1 #include "opencv2/imgproc/imgproc.hpp"
2 #include "opencv2/highgui/highgui.hpp"
11 printf("\nShow off image morphology: erosion, dialation, open and close\n"
12 "Call:\n morphology2 [image]\n"
13 "This program also shows use of rect, elipse and cross kernels\n\n");
14 printf( "Hot keys: \n"
15 "\tESC - quit the program\n"
16 "\tr - use rectangle structuring element\n"
17 "\te - use elliptic structuring element\n"
18 "\tc - use cross-shaped structuring element\n"
19 "\tSPACE - loop through all the options\n" );
24 int element_shape = MORPH_RECT;
26 //the address of variable which receives trackbar position update
28 int open_close_pos = 0;
29 int erode_dilate_pos = 0;
31 // callback function for open/close trackbar
32 static void OpenClose(int, void*)
34 int n = open_close_pos - max_iters;
35 int an = n > 0 ? n : -n;
36 Mat element = getStructuringElement(element_shape, Size(an*2+1, an*2+1), Point(an, an) );
38 morphologyEx(src, dst, MORPH_OPEN, element);
40 morphologyEx(src, dst, MORPH_CLOSE, element);
41 imshow("Open/Close",dst);
44 // callback function for erode/dilate trackbar
45 static void ErodeDilate(int, void*)
47 int n = erode_dilate_pos - max_iters;
48 int an = n > 0 ? n : -n;
49 Mat element = getStructuringElement(element_shape, Size(an*2+1, an*2+1), Point(an, an) );
51 erode(src, dst, element);
53 dilate(src, dst, element);
54 imshow("Erode/Dilate",dst);
58 int main( int argc, char** argv )
60 char* filename = argc == 2 ? argv[1] : (char*)"baboon.jpg";
61 if( (src = imread(filename,1)).data == 0 )
66 //create windows for output images
67 namedWindow("Open/Close",1);
68 namedWindow("Erode/Dilate",1);
70 open_close_pos = erode_dilate_pos = max_iters;
71 createTrackbar("iterations", "Open/Close",&open_close_pos,max_iters*2+1,OpenClose);
72 createTrackbar("iterations", "Erode/Dilate",&erode_dilate_pos,max_iters*2+1,ErodeDilate);
78 OpenClose(open_close_pos, 0);
79 ErodeDilate(erode_dilate_pos, 0);
85 element_shape = MORPH_ELLIPSE;
86 else if( (char)c == 'r' )
87 element_shape = MORPH_RECT;
88 else if( (char)c == 'c' )
89 element_shape = MORPH_CROSS;
90 else if( (char)c == ' ' )
91 element_shape = (element_shape + 1) % 3;