How do I remove grid lines from a JPEG image using Image Processing Toolbox 6.2 (R2008b)?

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MathWorks Support Team 2013-4-6

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https://ww2.mathworks.cn/matlabcentral/answers/99428-how-do-i-remove-grid-lines-from-a-jpeg-image-using-image-processing-toolbox-6-2-r2008b

I have a grayscale JPEG image that is largely dark and contains thin gray grid lines. I would like to replace the pixels forming the grid with pixels that fit in with the rest of the image.

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Answer 1

MathWorks Support Team 2013-4-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/99428-how-do-i-remove-grid-lines-from-a-jpeg-image-using-image-processing-toolbox-6-2-r2008b#answer_108775

The following example code demonstrates one way to remove thin grid lines from an image using erosion and dilation and compares the original image with the processed image.

close all; clear all; clc;
% Create image with light gray grid lines
I = imread('snowflakes.png');
I(:,[100,200,300]) = uint8(200);
I([50,100],:) = uint8(200);
subplot(2,1,1);
imshow(I);
title('Original image');
% Morphologically open image
se = strel('square',2);
I2 = imopen(I,se);
subplot(2,1,2);
imshow(I2);
title('Morphologically opened image');