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

Hello, I need to find the height and width of the following white object in this image.

Answer 1

[Alfonso]

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.

[sana3 sal]

Thank you for your kind effort :) but i have found what i need here: https://www.mathworks.com/matlabcentral/answers/351818-how-do-i-use-image-processing-to-determine-the-length-of-an-object-in-an-image Thank you again and again ♥

[Alfonso]

Okay, glad you were finally able to solve it.

[Walter Roberson]

eissam salem asks Alfonso:

can i get ur solution please?