mirror of
https://github.com/opencv/opencv.git
synced 2024-11-25 19:50:38 +08:00
86 lines
2.4 KiB
Matlab
86 lines
2.4 KiB
Matlab
#! /usr/bin/env octave
|
|
|
|
cv;
|
|
highgui;
|
|
|
|
function ret = randint(a, b)
|
|
ret = int32(rand() * (b - a) + a);
|
|
endfunction
|
|
|
|
function minarea_array(img, count)
|
|
global cv;
|
|
global highgui;
|
|
pointMat = cvCreateMat( count, 1, cv.CV_32SC2 );
|
|
for i=0:count-1,
|
|
pointMat(i) = cvPoint( randint(img.width/4, img.width*3/4), randint(img.height/4, img.height*3/4) );
|
|
endfor
|
|
|
|
box = cvMinAreaRect2( pointMat );
|
|
box_vtx = cvBoxPoints( box );
|
|
[success, center, radius] = cvMinEnclosingCircle( pointMat );
|
|
cv.cvZero( img );
|
|
for i=0:count-1,
|
|
cvCircle( img, cvGet1D(pointMat,i), 2, CV_RGB( 255, 0, 0 ), \
|
|
cv.CV_FILLED, cv.CV_AA, 0 );
|
|
endfor
|
|
|
|
box_vtx = {cvPointFrom32f(box_vtx{1}), \
|
|
cvPointFrom32f(box_vtx{2}), \
|
|
cvPointFrom32f(box_vtx{3}), \
|
|
cvPointFrom32f(box_vtx{4})};
|
|
cvCircle( img, cvPointFrom32f(center), cvRound(radius), CV_RGB(255, 255, 0), 1, cv.CV_AA, 0 );
|
|
cvPolyLine( img, {box_vtx}, 1, CV_RGB(0,255,255), 1, cv.CV_AA ) ;
|
|
endfunction
|
|
|
|
|
|
function minarea_seq(img, count, storage)
|
|
global cv;
|
|
global highgui;
|
|
ptseq = cvCreateSeq( bitor(cv.CV_SEQ_KIND_GENERIC, cv.CV_32SC2), cv.sizeof_CvContour, cv.sizeof_CvPoint, storage );
|
|
ptseq = cv.CvSeq_CvPoint.cast( ptseq );
|
|
for i=0:count-1,
|
|
pt0 = cvPoint( randint(img.width/4, img.width*3/4), randint(img.height/4, img.height*3/4) );
|
|
cvSeqPush( ptseq, pt0 );
|
|
endfor
|
|
box = cvMinAreaRect2( ptseq );
|
|
box_vtx = cvBoxPoints( box );
|
|
[success, center, radius] = cvMinEnclosingCircle( ptseq );
|
|
cv.cvZero( img );
|
|
for pt = CvSeq_map(ptseq),
|
|
pt = pt{1};
|
|
cvCircle( img, pt, 2, CV_RGB( 255, 0, 0 ), cv.CV_FILLED, cv.CV_AA, 0 );
|
|
endfor
|
|
|
|
box_vtx = {cvPointFrom32f(box_vtx{1}), \
|
|
cvPointFrom32f(box_vtx{2}), \
|
|
cvPointFrom32f(box_vtx{3}), \
|
|
cvPointFrom32f(box_vtx{4})};
|
|
cvCircle( img, cvPointFrom32f(center), cvRound(radius), CV_RGB(255, 255, 0), 1, cv.CV_AA, 0 );
|
|
cvPolyLine( img, {box_vtx}, 1, CV_RGB(0,255,255), 1, cv.CV_AA );
|
|
cvClearMemStorage( storage );
|
|
endfunction
|
|
|
|
img = cvCreateImage( cvSize( 500, 500 ), 8, 3 );
|
|
storage = cvCreateMemStorage(0);
|
|
|
|
cvNamedWindow( "rect & circle", 1 );
|
|
|
|
use_seq=false;
|
|
|
|
while (true),
|
|
count = randint(1,100);
|
|
if (use_seq)
|
|
minarea_seq(img, count, storage);
|
|
else
|
|
minarea_array(img, count);
|
|
endif
|
|
|
|
cvShowImage("rect & circle", img);
|
|
key = cvWaitKey();
|
|
if( key == '\x1b' );
|
|
break;
|
|
endif
|
|
|
|
use_seq = !use_seq;
|
|
endwhile
|