Find coordinate position (x1, y1, x2, y2) of multiple rectangle from an binary image

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TAUSEEF KHAN 2018-11-19

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回答： Akira Agata 2018-11-19

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.

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Answer 1

Akira Agata 2018-11-19

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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');