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I new to matlab and image analysis. I want to measure average width (also min and max width) and and area of this probe. can anyone help me how to do this? thanks.

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Answers (1)

yanqi liu
yanqi liu on 15 Oct 2021
sir,please check the follow code to get some information
clc; clear all; close all;
img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/767536/Diameter21.jpg');
im = rgb2gray(img);
bw = imbinarize(im,'adaptive','ForegroundPolarity','dark','Sensitivity',0.6);
bw = imclose(bw, strel('line', 19, 90));
bw = bwareaopen(bw, 2000);
[L,num]=bwlabel(bw);
stats = regionprops(L);
ar = cat(1, stats.Area);
[~,ind] = sort(ar);
bw = L==ind(1)|L==ind(2);
im1 = im; im2 = im; im3 = im;
im1(bw) = 255; im2(bw) = 0; im3(bw) = 0;
imt = cat(3,im1,im2,im3);
figure; imshow(bw);
figure; imshow(imt);
% width
wid = [];
for i = 1 : size(bw,1)
ri = bw(i,:);
indi = find(ri);
wid(i) = indi(end)-indi(1);
end
% max、min、average
max_width = max(wid)
max_width = 329
min_width = min(wid)
min_width = 295
average_width = mean(wid)
average_width = 305.8774
  1 Comment
Dinesh Dhameliya
Dinesh Dhameliya on 22 Oct 2021
thanks for your valable time and answer. but this code is working on only on upper Image but for other Images not working. I uploded image here. And above mentioned book is available in English?
thanks again.

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