How can i find the total length of this rod please anyone help me ?

please find the length of this rod from start point to end point please give me solution i am new user in matlab software.

[Shri.s]

I want this length in mm

[Walter Roberson]

Please examine this photograph of an Imperial I-class Star Destroyer and tell us, using information only from the image, how long the Star Destroyer is? How large was it in the first Star Wars film?

(credit: starwars.com )

[Walter Roberson]

Answer 1

[Walter Roberson]

filename = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/1379339/image.png';
grey = rgb2gray(imread(filename));
BW = grey >= 250;
imshow(BW)

props = regionprops(BW, 'MajorAxisLength');

object_size = props.MajorAxisLength   %in pixels

object_size = 640.1314