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

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.

Answer 1

[Akira Agata]

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