Detect all the rectangles in image
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Hey all,
in the following image, all the rectangles are a little bit deformed due to power leakage effect. I want to detect all the rectangles and obtain the positions of the rectangles.
Is there a way to detect all rectangles?
Thank you
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Accepted Answer
Image Analyst
on 18 Feb 2019
It's trivial. Just use regionprops(). See my Image Segmentation Tutorial
9 Comments
Image Analyst
on 20 Feb 2019
How about you just compute the centroid, even with the tails, then take a vertical and horizontal line through the centroid and use find() to find the top and bottom lines and left and right columns of the rectangle?
More Answers (1)
KSSV
on 18 Feb 2019
I = imread('myImage.jpeg') ;
[y,x] = find(I>50) ;
imshow(I)
hold on
idx = kmeans([x y],4) ;
for i = 1:4
plot(x(idx==i),y(idx==i),'.')
% GEt L and B of rectangles
x0 = min(x(idx==i)) ; x1 = max(x(idx==i)) ;
y0 = min(y(idx==i)) ; y1 = max(y(idx==i)) ;
%
L = x1-x0 ;
B = y1-y0 ;
coor = [x0 y0 ; x0 y1 ; x1 y1 ; x1 y0] ;
patch(coor(:,1),coor(:,2),rand(1,3))
end
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