Detect all the rectangles in image
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simon xu
le 18 Fév 2019
Commenté : islam elsayed
le 11 Juin 2020
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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Image Analyst
le 18 Fév 2019
It's trivial. Just use regionprops(). See my Image Segmentation Tutorial
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Image Analyst
le 20 Fév 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?
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KSSV
le 18 Fév 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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