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https://github.com/opencv/opencv.git
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108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
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#include <opencv2/imgproc/imgproc.hpp>
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#include <opencv2/highgui/highgui.hpp>
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#include <opencv2/gpu/gpu.hpp>
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#include <stdlib.h>
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#include <stdio.h>
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using namespace cv;
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using namespace cv::gpu;
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void help()
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{
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printf("\nShow off image morphology: erosion, dialation, open and close\n"
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"Call:\n morphology2 [image]\n"
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"This program also shows use of rect, elipse and cross kernels\n\n");
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printf( "Hot 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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GpuMat src, dst;
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int element_shape = MORPH_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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void OpenClose(int, void*)
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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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Mat element = getStructuringElement(element_shape, Size(an*2+1, an*2+1), Point(an, an) );
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if( n < 0 )
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cv::gpu::morphologyEx(src, dst, CV_MOP_OPEN, element);
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else
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cv::gpu::morphologyEx(src, dst, CV_MOP_CLOSE, element);
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imshow("Open/Close",dst);
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}
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// callback function for erode/dilate trackbar
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void ErodeDilate(int, void*)
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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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Mat element = getStructuringElement(element_shape, Size(an*2+1, an*2+1), Point(an, an) );
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if( n < 0 )
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cv::gpu::erode(src, dst, element);
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else
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cv::gpu::dilate(src, dst, element);
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imshow("Erode/Dilate",dst);
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}
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int main( int argc, char** argv )
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{
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char* filename = argc == 2 ? argv[1] : (char*)"baboon.jpg";
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if( (src = imread(filename,1)).data == 0 )
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return help(), -1;
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help();
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if (src.channels() == 3)
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{
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// gpu support only 4th channel images
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GpuMat src4ch;
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cv::gpu::cvtColor(src, src4ch, CV_BGR2BGRA);
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src = src4ch;
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}
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//create windows for output images
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namedWindow("Open/Close",1);
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namedWindow("Erode/Dilate",1);
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open_close_pos = erode_dilate_pos = max_iters;
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createTrackbar("iterations", "Open/Close",&open_close_pos,max_iters*2+1,OpenClose);
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createTrackbar("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, 0);
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ErodeDilate(erode_dilate_pos, 0);
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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 = MORPH_ELLIPSE;
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else if( (char)c == 'r' )
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element_shape = MORPH_RECT;
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else if( (char)c == 'c' )
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element_shape = MORPH_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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return 0;
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}
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