57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
#include "opencv2/imgproc.hpp"
|
|
#include "opencv2/highgui.hpp"
|
|
#include <iostream>
|
|
|
|
using namespace cv;
|
|
using namespace std;
|
|
|
|
static void help(char** argv)
|
|
{
|
|
cout << "\nThis sample program demonstrates the use of the convexHull() function\n"
|
|
<< "Call:\n"
|
|
<< argv[0] << endl;
|
|
}
|
|
|
|
int main( int argc, char** argv )
|
|
{
|
|
CommandLineParser parser(argc, argv, "{help h||}");
|
|
if (parser.has("help"))
|
|
{
|
|
help(argv);
|
|
return 0;
|
|
}
|
|
Mat img(500, 500, CV_8UC3);
|
|
RNG& rng = theRNG();
|
|
|
|
for(;;)
|
|
{
|
|
int i, count = (unsigned)rng%100 + 1;
|
|
|
|
vector<Point> points;
|
|
|
|
for( i = 0; i < count; i++ )
|
|
{
|
|
Point pt;
|
|
pt.x = rng.uniform(img.cols/4, img.cols*3/4);
|
|
pt.y = rng.uniform(img.rows/4, img.rows*3/4);
|
|
|
|
points.push_back(pt);
|
|
}
|
|
|
|
vector<Point> hull;
|
|
convexHull(points, hull, true);
|
|
|
|
img = Scalar::all(0);
|
|
for( i = 0; i < count; i++ )
|
|
circle(img, points[i], 3, Scalar(0, 0, 255), FILLED, LINE_AA);
|
|
|
|
polylines(img, hull, true, Scalar(0, 255, 0), 1, LINE_AA);
|
|
imshow("hull", img);
|
|
|
|
char key = (char)waitKey();
|
|
if( key == 27 || key == 'q' || key == 'Q' ) // 'ESC'
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|