131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
#include "opencv2/highgui/highgui.hpp"
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#include "opencv2/imgproc/imgproc_c.h"
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#include <stdio.h>
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IplImage* src = 0;
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IplImage* dst = 0;
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IplConvKernel* element = 0;
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int element_shape = CV_SHAPE_RECT;
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//the address of variable which receives trackbar position update
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int max_iters = 10;
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int open_close_pos = 0;
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int erode_dilate_pos = 0;
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// callback function for open/close trackbar
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static void OpenClose(int pos)
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{
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int n = open_close_pos - max_iters;
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int an = n > 0 ? n : -n;
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(void)pos;
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element = cvCreateStructuringElementEx( an*2+1, an*2+1, an, an, element_shape, 0 );
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if( n < 0 )
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{
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cvErode(src,dst,element,1);
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cvDilate(dst,dst,element,1);
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}
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else
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{
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cvDilate(src,dst,element,1);
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cvErode(dst,dst,element,1);
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}
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cvReleaseStructuringElement(&element);
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cvShowImage("Open/Close",dst);
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}
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// callback function for erode/dilate trackbar
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static void ErodeDilate(int pos)
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{
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int n = erode_dilate_pos - max_iters;
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int an = n > 0 ? n : -n;
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(void)pos;
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element = cvCreateStructuringElementEx( an*2+1, an*2+1, an, an, element_shape, 0 );
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if( n < 0 )
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{
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cvErode(src,dst,element,1);
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}
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else
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{
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cvDilate(src,dst,element,1);
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}
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cvReleaseStructuringElement(&element);
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cvShowImage("Erode/Dilate",dst);
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}
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static void help(void)
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{
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printf( "This program demonstrated the use of the morphology operator, especially open, close, erode, dilate operations\n"
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"Morphology operators are built on max (close) and min (open) operators as measured by pixels covered by small structuring elements.\n"
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"These operators are very efficient.\n"
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"This program also allows you to play with elliptical, rectangluar and cross structure elements\n"
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"Usage: \n"
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"./morphologyc [image_name -- Default baboon.jpg]\n"
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"\nHot keys: \n"
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"\tESC - quit the program\n"
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"\tr - use rectangle structuring element\n"
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"\te - use elliptic structuring element\n"
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"\tc - use cross-shaped structuring element\n"
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"\tSPACE - loop through all the options\n" );
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}
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int main( int argc, char** argv )
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{
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char* filename = 0;
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help();
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filename = argc == 2 ? argv[1] : (char*)"baboon.jpg";
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if( (src = cvLoadImage(filename,1)) == 0 )
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{
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printf("Cannot load file image %s\n", filename);
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help();
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return -1;
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}
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dst = cvCloneImage(src);
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//create windows for output images
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cvNamedWindow("Open/Close",1);
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cvNamedWindow("Erode/Dilate",1);
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open_close_pos = erode_dilate_pos = max_iters;
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cvCreateTrackbar("iterations", "Open/Close",&open_close_pos,max_iters*2+1,OpenClose);
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cvCreateTrackbar("iterations", "Erode/Dilate",&erode_dilate_pos,max_iters*2+1,ErodeDilate);
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for(;;)
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{
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int c;
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OpenClose(open_close_pos);
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ErodeDilate(erode_dilate_pos);
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c = cvWaitKey(0);
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if( (char)c == 27 )
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break;
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if( (char)c == 'e' )
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element_shape = CV_SHAPE_ELLIPSE;
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else if( (char)c == 'r' )
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element_shape = CV_SHAPE_RECT;
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else if( (char)c == 'c' )
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element_shape = CV_SHAPE_CROSS;
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else if( (char)c == ' ' )
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element_shape = (element_shape + 1) % 3;
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}
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//release images
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cvReleaseImage(&src);
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cvReleaseImage(&dst);
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//destroy windows
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cvDestroyWindow("Open/Close");
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cvDestroyWindow("Erode/Dilate");
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return 0;
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}
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