#include <iostream>
static void help()
{
cout << "This program demonstrates finding the minimum enclosing box, triangle or circle of a set\n"
<< "of points using functions: minAreaRect() minEnclosingTriangle() minEnclosingCircle().\n"
<< "Random points are generated and then enclosed.\n\n"
<< "Press ESC, 'q' or 'Q' to exit and any other key to regenerate the set of points.\n\n";
}
int main( int , char** )
{
help();
for(;;)
{
int i, count = rng.
uniform(1, 101);
vector<Point> points;
for( i = 0; i < count; i++ )
{
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);
}
float radius = 0;
img = Scalar::all(0);
for( i = 0; i < count; i++ )
for( i = 0; i < 4; i++ )
for( i = 0; i < 3; i++ )
imshow(
"Rectangle, triangle & circle", img );
if( key == 27 || key == 'q' || key == 'Q' )
break;
}
return 0;
}
n-dimensional dense array class
Definition: mat.hpp:811
_Tp y
y coordinate of the point
Definition: types.hpp:197
_Tp x
x coordinate of the point
Definition: types.hpp:196
Random Number Generator.
Definition: core.hpp:2826
int uniform(int a, int b)
returns uniformly distributed integer random number from [a,b) range
The class represents rotated (i.e. not up-right) rectangles on a plane.
Definition: types.hpp:526
void points(Point2f pts[]) const
RNG & theRNG()
Returns the default random number generator.
Scalar_< double > Scalar
Definition: types.hpp:691
#define CV_8UC3
Definition: interface.h:90
int cvRound(double value)
Rounds floating-point number to the nearest integer.
Definition: fast_math.hpp:200
@ triangle
Definition: gr_skig.hpp:63
@ circle
Definition: gr_skig.hpp:62
void imshow(const String &winname, InputArray mat)
Displays an image in the specified window.
int waitKey(int delay=0)
Waits for a pressed key.
void line(InputOutputArray img, Point pt1, Point pt2, const Scalar &color, int thickness=1, int lineType=LINE_8, int shift=0)
Draws a line segment connecting two points.
@ LINE_AA
antialiased line
Definition: imgproc.hpp:861
@ FILLED
Definition: imgproc.hpp:858
double minEnclosingTriangle(InputArray points, OutputArray triangle)
Finds a triangle of minimum area enclosing a 2D point set and returns its area.
RotatedRect minAreaRect(InputArray points)
Finds a rotated rectangle of the minimum area enclosing the input 2D point set.
void minEnclosingCircle(InputArray points, Point2f ¢er, float &radius)
Finds a circle of the minimum area enclosing a 2D point set.
"black box" representation of the file storage associated with a file on disk.
Definition: core.hpp:106