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

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Shri.s
Shri.s 2023-5-10
编辑： Walter Roberson 2023-5-10
please find the length of this rod from start point to end point please give me solution i am new user in matlab software.
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Walter Roberson
Walter Roberson 2023-5-10
编辑：Walter Roberson 2023-5-10
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 )

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Walter Roberson
Walter Roberson 2023-5-10
Ran in:
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

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