1 #include "opencv2/highgui/highgui.hpp"
2 #include "opencv2/imgproc/imgproc_c.h"
9 IplConvKernel* element = 0;
10 int element_shape = CV_SHAPE_RECT;
12 //the address of variable which receives trackbar position update
14 int open_close_pos = 0;
15 int erode_dilate_pos = 0;
17 // callback function for open/close trackbar
18 void OpenClose(int pos)
20 int n = open_close_pos - max_iters;
21 int an = n > 0 ? n : -n;
22 element = cvCreateStructuringElementEx( an*2+1, an*2+1, an, an, element_shape, 0 );
25 cvErode(src,dst,element,1);
26 cvDilate(dst,dst,element,1);
30 cvDilate(src,dst,element,1);
31 cvErode(dst,dst,element,1);
33 cvReleaseStructuringElement(&element);
34 cvShowImage("Open/Close",dst);
37 // callback function for erode/dilate trackbar
38 void ErodeDilate(int pos)
40 int n = erode_dilate_pos - max_iters;
41 int an = n > 0 ? n : -n;
42 element = cvCreateStructuringElementEx( an*2+1, an*2+1, an, an, element_shape, 0 );
45 cvErode(src,dst,element,1);
49 cvDilate(src,dst,element,1);
51 cvReleaseStructuringElement(&element);
52 cvShowImage("Erode/Dilate",dst);
57 printf( "This program demonstrated the use of the morphology operator, especially open, close, erode, dilate operations\n"
58 "Morphology operators are built on max (close) and min (open) operators as measured by pixels covered by small structuring elements.\n"
59 "These operators are very efficient.\n"
60 "This program also allows you to play with elliptical, rectangluar and cross structure elements\n"
62 "./morphologyc [image_name -- Default baboon.jpg]\n"
64 "\tESC - quit the program\n"
65 "\tr - use rectangle structuring element\n"
66 "\te - use elliptic structuring element\n"
67 "\tc - use cross-shaped structuring element\n"
68 "\tSPACE - loop through all the options\n" );
71 int main( int argc, char** argv )
73 char* filename = argc == 2 ? argv[1] : (char*)"baboon.jpg";
74 if( (src = cvLoadImage(filename,1)) == 0 )
79 dst = cvCloneImage(src);
81 //create windows for output images
82 cvNamedWindow("Open/Close",1);
83 cvNamedWindow("Erode/Dilate",1);
85 open_close_pos = erode_dilate_pos = max_iters;
86 cvCreateTrackbar("iterations", "Open/Close",&open_close_pos,max_iters*2+1,OpenClose);
87 cvCreateTrackbar("iterations", "Erode/Dilate",&erode_dilate_pos,max_iters*2+1,ErodeDilate);
93 OpenClose(open_close_pos);
94 ErodeDilate(erode_dilate_pos);
100 element_shape = CV_SHAPE_ELLIPSE;
101 else if( (char)c == 'r' )
102 element_shape = CV_SHAPE_RECT;
103 else if( (char)c == 'c' )
104 element_shape = CV_SHAPE_CROSS;
105 else if( (char)c == ' ' )
106 element_shape = (element_shape + 1) % 3;
110 cvReleaseImage(&src);
111 cvReleaseImage(&dst);
114 cvDestroyWindow("Open/Close");
115 cvDestroyWindow("Erode/Dilate");