I am the beginer for doing simple image subtration to obtain defect image.

CHEE HOON SEOW - 2022-02-19T10:53:00+00:00

Question: I am the beginer for doing simple image subtration to obtain defect image.

Hi, I am the beginer for doing simple image subtration to obtain defect image. Is it possible to make it only show the defect image if nothing difference wont show? clc   clear   close all   warning off;   x=imread('origin.jpg');   y=imread('capture.jpg');   [g, c, d]=size(x);   y=imresize(y,[g,c]);   subplot(1,3,1);   imshow(x);   title('origin image');   subplot(1,3,2);   imshow(y);   title('capture image');   subplot(1,3,3);   imshow(x-y);   title('defect occur if difference colour shown');    

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Expert Answer

John Williams answered . 2025-11-20

clc
clear
close all
warning off;
x=imread('origin.jpg');
y=imread('capture.jpg');
[g, c, d]=size(x);
y=imresize(y,[g,c]);
subplot(1,3,1);
imshow(x);
title('origin image');
subplot(1,3,2);
imshow(y);
title('capture image');
bw = find((x-y) > 1);
if numel(bw) > 1
    subplot(1,3,3);
    imshow(x-y);
    title('defect occur if difference colour shown');
end

 

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