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How to evaluate the height and width of an object in BW image

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sana3 sal
sana3 sal on 2 May 2018
Commented: Walter Roberson on 13 Jun 2020
Hello, I need to find the height and width of the following white object in this image.

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Answers (1)

Alfonso
Alfonso on 2 May 2018
Edited: Alfonso on 2 May 2018
Try this
% Get boundary
bw = bwboundaries(binary_img);
bw = bw{1};
bw_x = bw(:, 2); %columns
bw_y = bw(:, 1); %rows
% height and width
leftCol = min(bw_x);
rightCol = max(bw_x);
top = max(bw_y);
bottom = min(bw_y);
width = rightCol - leftCol + 1;
height = top - bottom + 1;
% Crop the img
img_cropped = imcrop(binary_img, [leftCol, bottom, width, height]);
imshow(img_cropped)
Just change binary_img by the name of the one you posted.

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