How to find four coordinates of inner rectangle?
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Ashwathy Dev
on 3 Feb 2015
Commented: Image Analyst
on 4 Feb 2015
How to find the four inner coordinates of the white rectangle in matlab?
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Accepted Answer
Michael Haderlein
on 3 Feb 2015
Edited: Michael Haderlein
on 3 Feb 2015
vsum=sum(image,1);
hsum=sum(image,2);
top=find(vsum,1,'first');
bottom=find(vsum,1,'last');
left=find(hsum,1,'first');
right=find(hsum,1,'last');
6 Comments
Image Analyst
on 4 Feb 2015
Michael's reply moved from Ashwathyu's "Answer" to here:
So is the question still open? What exactly do you need anymore? If my answer doesn't work/fit/suffice, please tell us what exactly is the problem. If my answer is fine, please mark it as accepted. This way, nobody will waste time reading through questions which have already been answered.
Thanks!
Image Analyst
on 4 Feb 2015
Michael, your top/bottom is correct - nothing to switch/reverse. For images, like arrays, the top line is 1 and increases from there, so your formula for top will give the correct line (row) number.
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