Drawing 4-sided polygons around objects

Hello

I wrote a code to approximate each brick in this image into rectangles. However, some bricks in other images can't be approximated into rectangles due to the irregular shape

So, I need to draw a 4-sided polygon around each brick. Can any one help me?

Here is the rectangle's code:

clc; clear; close; 
I = imread ('1.png');
figure, imshow(I);
IBW = imbinarize(rgb2gray(I));
[L, num ] = bwlabel(IBW);
bboxes = regionprops(L, 'BoundingBox');
figure, imshow(IBW);
hold on 
for k=1 : length(bboxes)
    curbb = bboxes(k). BoundingBox;
    rectangle ('Position',[curbb(1),curbb(2),curbb(3),curbb(4)], 'EdgeColor','g', 'LineWidth', 1)
end 
hold off 

Answer 1

[Matt J]

This will help to find the corners of the boxes.

https://www.mathworks.com/matlabcentral/fileexchange/74181-find-vertices-in-image-of-convex-polygon

Use the line() command instead of rectangle() to draw general quadrilaterals.

[Mohammad Abu-Haifa]

There is an error appers (Unrecognized function or variable 'pgonCorners').

[Mohammad Abu-Haifa]

can you please write the final code based on the information presented in my code in the question?