vector convert to mat rule
 
  
 
  
 
 
 
 
 
 asked Jun 18 '13 
 
 wuling gravatar image  
 
 
 
 updated Sep 3 '17 
 
 sturkmen gravatar image  
 
 
 
 
 
Hi all,
I have a question about vector convert to mat
 
for example: the code below from generalContours_demo2.cp
 
  for( size_t i = 0; i < contours.size(); i++ )
     { minRect[i] = minAreaRect( Mat(contours[i]) );
       if( contours[i].size() > 5 )
         { minEllipse[i] = fitEllipse( Mat(contours[i]) ); }
     }
 
it can be like
 
  for( size_t i = 0; i < contours.size(); i++ )
     { minRect[i] = minAreaRect( contours[i] );
       if( contours[i].size() > 5 )
         { minEllipse[i] = fitEllipse( contours[i] ); }
     }
 
is any rule to follow ?
 
thanks.
 
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Comments
findContours expects an 8bit binary img as 1st argument, so your first 2 lines won't work.
the last one won't work, too because of vector of vector.
please pick a better example!
berak gravatar imageberak (Jun 18 '13)edit
hi berak,yes, the last contourArea(contourB) can't work,it should be contour(contourB[index]).
I think i should try the other function.:)
wuling gravatar imagewuling (Jun 18 '13)edit
i edited the question because i also want to get an answer.
sturkmen gravatar imagesturkmen (Sep 3 '17)edit
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