Find coordinate position (x1, y1, x2, y2) of multiple rectangle from an binary image
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I have a binary image with multiple rectangle in non-overlapping state. I need to find the coordinates (x1, y1, x2, y2) of each rectangle in matlab. Please suggest me. I have posted my image here.![binary_image.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/195637/binary_image.png)
![binary_image.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/195637/binary_image.png)
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Answers (1)
Akira Agata
on 19 Nov 2018
If your rectangle are always horizontal and/or vertical in your images, regionprops function will work, like:
% Read the image
I = imread('sample.png');
% Binarize, invert and suppress areas connected to image border
BW = imbinarize(rgb2gray(I));
BW = imclearborder(~BW);
% Calculate bounding box for each rectangle
s = regionprops(BW,'BoundingBox');
Then, you can calculate coodinate points (x1,y1) ~ (x4,y4) from the result.
>> struct2table(s)
ans =
4×1 table
BoundingBox
________________________________
16.5 241.5 121 9
31.5 196.5 106 9
31.5 226.5 61 9
106.5 226.5 46 9
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