Extract and Edge and Calculate its lenght

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mustafa alnasser 2014-1-11

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https://ww2.mathworks.cn/matlabcentral/answers/112103-extract-and-edge-and-calculate-its-lenght

评论： KALYAN ACHARJYA 2019-4-24

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Dear all ;

i have an image i found the edge and i need to calcuate it lentgh , what is the best way for that

my code as follow but i feel it is not correct.

clc; clear; a = imread('st-2.jpg'); b=rgb2gray(a); BW1=im2bw(b);

        figure (1), imshow(BW1)
        BW2=edge(BW1,'canny');
        BW21 = bwmorph(BW2,'remove');
        figure  (2), imshow(BW21)
           [L,NUM] = bwlabel(BW21,8);
       [m,c] = find(L == 1);
         S = regionprops(L,'Area');
         r=struct2array(S);
         [l,w]=size(b);