Re: [MacPorts] #24594: OpenCV 2.0 - HoughLinesP memory allocation

22 Apr 2010

      #24594: OpenCV 2.0 - HoughLinesP memory allocation
------------------------------------+---------------------------------------
 Reporter:  nicola.conci@…          |       Owner:  stante@…        
     Type:  defect                  |      Status:  new             
 Priority:  Normal                  |   Milestone:                  
Component:  ports                   |     Version:  1.8.2           
 Keywords:                          |        Port:  OpenCV          
------------------------------------+---------------------------------------
Changes (by jmr@…):

  * owner:  macports-tickets@… => stante@…
  * port:  => OpenCV

Old description:
...
hi,
I tried running the HoughLinesP function on a video, to check consistency
of lines over successive frames. I guess there is something wrong with
the allocation/deallocation though, since running it several times you
notice the memory increases until the computer slows down.
if I comment the HoughLinesP function, everything runs smoothly.
That's a sample of the code (myFrame and edges are 320x240):
int     blockSize=8;
for (int c=1;c<300;c++) {
cap >> myFrame;
cvtColor(myFrame, edges, CV_RGB2GRAY, 0);
Canny(edges, edges, 80, 120, 3, false);
for (int k=0;k<(edges.rows-blockSize);k+=blockSize-1) {
                        for (int l=0;l<(edges.cols-
blockSize);l+=blockSize-1) {
                                vector<Vec4i> lines;
                                Mat
blockEdge(edges,Rect(l,k,blockSize,blockSize));
                                Mat
blockOrig(myFrame,Rect(l,k,blockSize,blockSize));
                                //APPLY HOUGH
                                HoughLinesP(blockEdge, lines, 1,
CV_PI/90, 5, 4, 10 );
blockEdge.release();
                                blockOrig.release();

...
}
                }
waitKey(10);
                printf("Frame n: %d", c);
}

...
Thanks,
Nicola
New description:

 hi,
 I tried running the HoughLinesP function on a video, to check consistency
 of lines over successive frames. I guess there is something wrong with the
 allocation/deallocation though, since running it several times you notice
 the memory increases until the computer slows down.

 if I comment the HoughLinesP function, everything runs smoothly.

 That's a sample of the code (myFrame and edges are 320x240):
 {{{
 int     blockSize=8;

 for (int c=1;c<300;c++) {

                 cap >> myFrame;

                 cvtColor(myFrame, edges, CV_RGB2GRAY, 0);

                 Canny(edges, edges, 80, 120, 3, false);

                 for (int k=0;k<(edges.rows-blockSize);k+=blockSize-1) {
                         for (int l=0;l<(edges.cols-
 blockSize);l+=blockSize-1) {
                                 vector<Vec4i> lines;
                                 Mat
 blockEdge(edges,Rect(l,k,blockSize,blockSize));
                                 Mat
 blockOrig(myFrame,Rect(l,k,blockSize,blockSize));
                                 //APPLY HOUGH
                                 HoughLinesP(blockEdge, lines, 1, CV_PI/90,
 5, 4, 10 );

                                 blockEdge.release();
                                 blockOrig.release();

                         }
                 }

                 waitKey(10);
                 printf("Frame n: %d", c);

         }
 }}}

 Thanks,
 Nicola

--

Comment:

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-- 
Ticket URL: <http://trac.macports.org/ticket/24594#comment:1>
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