8bada4c751
Changed the sample source file minarea.cpp to use the overloaded version of the function. Updated some comments in the min_enclosing_triangle.cpp source file.
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
#include "opencv2/highgui/highgui.hpp"
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#include "opencv2/imgproc/imgproc.hpp"
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#include <iostream>
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using namespace cv;
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using namespace std;
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static void help()
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{
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cout << "This program demonstrates finding the minimum enclosing box, triangle or circle of a set\n"
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<< "of points using functions: minAreaRect() minEnclosingTriangle() minEnclosingCircle().\n"
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<< "Random points are generated and then enclosed.\n\n"
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<< "Press ESC, 'q' or 'Q' to exit and any other key to regenerate the set of points.\n\n"
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<< "Call:\n"
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<< "./minarea\n"
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<< "Using OpenCV v" << CV_VERSION << "\n" << endl;
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}
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int main( int /*argc*/, char** /*argv*/ )
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{
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help();
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Mat img(500, 500, CV_8UC3);
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RNG& rng = theRNG();
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for(;;)
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{
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int i, count = rng.uniform(1, 101);
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vector<Point> points;
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// Generate a random set of points
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for( i = 0; i < count; i++ )
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{
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Point pt;
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pt.x = rng.uniform(img.cols/4, img.cols*3/4);
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pt.y = rng.uniform(img.rows/4, img.rows*3/4);
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points.push_back(pt);
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}
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// Find the minimum area enclosing bounding box
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RotatedRect box = minAreaRect(Mat(points));
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// Find the minimum area enclosing triangle
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vector<Point2f> triangle;
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minEnclosingTriangle(points, triangle);
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// Find the minimum area enclosing circle
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Point2f center, vtx[4];
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float radius = 0;
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minEnclosingCircle(Mat(points), center, radius);
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box.points(vtx);
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img = Scalar::all(0);
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// Draw the points
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for( i = 0; i < count; i++ )
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circle( img, points[i], 3, Scalar(0, 0, 255), FILLED, LINE_AA );
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// Draw the bounding box
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for( i = 0; i < 4; i++ )
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line(img, vtx[i], vtx[(i+1)%4], Scalar(0, 255, 0), 1, LINE_AA);
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// Draw the triangle
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for( i = 0; i < 3; i++ )
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line(img, triangle[i], triangle[(i+1)%3], Scalar(255, 255, 0), 1, LINE_AA);
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// Draw the circle
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circle(img, center, cvRound(radius), Scalar(0, 255, 255), 1, LINE_AA);
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imshow( "Rectangle, triangle & circle", img );
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char key = (char)waitKey();
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if( key == 27 || key == 'q' || key == 'Q' ) // 'ESC'
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break;
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}
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return 0;
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}
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