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Bounding Boxes at any points

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arun Dhillon
arun Dhillon on 29 Jan 2019
Commented: Brian Hart on 30 Jan 2019
Can anyone suggest me that how do i create a bounding box on any desired coordinate in an image,, for instance, if i want to create a bounding box of size 2*2mm at the pixel coordinate 13,15 or 25,25. Is there any way to create the bounding boxes as such.
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Accepted Answer

Brian Hart
Brian Hart on 29 Jan 2019
Hi arun,
Here's some code to do what you asked, but with everything in units of the graph/plot (not mixing mm / pixel coordinates):
figure;
x=3;
y=5;
plot(x,y,'*')
boxHalfWidth = 1; %
boxXStart = x-boxHalfWidth;
boxYStart = y-boxHalfWidth;
boxWidth = 2 * boxHalfWidth;
boxHeight = 2 * boxHalfWidth;
rectangle('Position',[boxXStart boxYStart boxWidth boxHeight])
axis([0 10 0 10])
axis square
You can change the boxHalfWidth variable for different box sizes.
  2 Comments
Brian Hart
Brian Hart on 30 Jan 2019
That should be possible. If the x,y points are in an array, you could use a for-loop to draw rectangles for each point pair.

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