118 lines
3.0 KiB
C
Executable File
118 lines
3.0 KiB
C
Executable File
#ifdef _CH_
|
|
#pragma package <opencv>
|
|
#endif
|
|
|
|
#ifndef _EiC
|
|
#include "cv.h"
|
|
#include "highgui.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#endif
|
|
|
|
#define ARRAY 1
|
|
|
|
void help()
|
|
{
|
|
printf("\nThis program demonstrates finding the minimum enclosing box or circle of a set\n"
|
|
"of points using functions: minAreaRect() minEnclosingCircle().\n"
|
|
"Random points are generated and then enclosed.\n"
|
|
"Call:\n"
|
|
"./minarea\n");
|
|
}
|
|
|
|
int main( int argc, char** argv )
|
|
{
|
|
IplImage* img = cvCreateImage( cvSize( 500, 500 ), 8, 3 );
|
|
#if !ARRAY
|
|
CvMemStorage* storage = cvCreateMemStorage(0);
|
|
#endif
|
|
help();
|
|
cvNamedWindow( "rect & circle", 1 );
|
|
|
|
for(;;)
|
|
{
|
|
char key;
|
|
int i, count = rand()%100 + 1;
|
|
CvPoint pt0, pt;
|
|
CvBox2D box;
|
|
CvPoint2D32f box_vtx[4];
|
|
CvPoint2D32f center;
|
|
CvPoint icenter;
|
|
float radius;
|
|
#if !ARRAY
|
|
CvSeq* ptseq = cvCreateSeq( CV_SEQ_KIND_GENERIC|CV_32SC2, sizeof(CvContour),
|
|
sizeof(CvPoint), storage );
|
|
for( i = 0; i < count; i++ )
|
|
{
|
|
pt0.x = rand() % (img->width/2) + img->width/4;
|
|
pt0.y = rand() % (img->height/2) + img->height/4;
|
|
cvSeqPush( ptseq, &pt0 );
|
|
}
|
|
#ifndef _EiC /* unfortunately, here EiC crashes */
|
|
box = cvMinAreaRect2( ptseq, 0 );
|
|
#endif
|
|
cvMinEnclosingCircle( ptseq, ¢er, &radius );
|
|
#else
|
|
CvPoint* points = (CvPoint*)malloc( count * sizeof(points[0]));
|
|
CvMat pointMat = cvMat( 1, count, CV_32SC2, points );
|
|
|
|
for( i = 0; i < count; i++ )
|
|
{
|
|
pt0.x = rand() % (img->width/2) + img->width/4;
|
|
pt0.y = rand() % (img->height/2) + img->height/4;
|
|
points[i] = pt0;
|
|
}
|
|
#ifndef _EiC
|
|
box = cvMinAreaRect2( &pointMat, 0 );
|
|
#endif
|
|
cvMinEnclosingCircle( &pointMat, ¢er, &radius );
|
|
#endif
|
|
cvBoxPoints( box, box_vtx );
|
|
cvZero( img );
|
|
for( i = 0; i < count; i++ )
|
|
{
|
|
#if !ARRAY
|
|
pt0 = *CV_GET_SEQ_ELEM( CvPoint, ptseq, i );
|
|
#else
|
|
pt0 = points[i];
|
|
#endif
|
|
cvCircle( img, pt0, 2, CV_RGB( 255, 0, 0 ), CV_FILLED, CV_AA, 0 );
|
|
}
|
|
|
|
#ifndef _EiC
|
|
pt0.x = cvRound(box_vtx[3].x);
|
|
pt0.y = cvRound(box_vtx[3].y);
|
|
for( i = 0; i < 4; i++ )
|
|
{
|
|
pt.x = cvRound(box_vtx[i].x);
|
|
pt.y = cvRound(box_vtx[i].y);
|
|
cvLine(img, pt0, pt, CV_RGB(0, 255, 0), 1, CV_AA, 0);
|
|
pt0 = pt;
|
|
}
|
|
#endif
|
|
icenter.x = cvRound(center.x);
|
|
icenter.y = cvRound(center.y);
|
|
cvCircle( img, icenter, cvRound(radius), CV_RGB(255, 255, 0), 1, CV_AA, 0 );
|
|
|
|
cvShowImage( "rect & circle", img );
|
|
|
|
key = (char) cvWaitKey(0);
|
|
if( key == 27 || key == 'q' || key == 'Q' ) // 'ESC'
|
|
break;
|
|
|
|
#if !ARRAY
|
|
cvClearMemStorage( storage );
|
|
#else
|
|
free( points );
|
|
#endif
|
|
}
|
|
|
|
cvDestroyWindow( "rect & circle" );
|
|
return 0;
|
|
}
|
|
|
|
#ifdef _EiC
|
|
main(1,"convexhull.c");
|
|
#endif
|
|
|