Reducing the size of images by a loop

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Joydeb Saha
Joydeb Saha 2021-9-8
评论： Image Analyst 2021-9-8
Here I reduced the size of an image. But I want to reduce the size of all the images of my folder. Images are : abc_20190304_0001 to abc_20190304_0095. How can I make the loop?
I=imread('abc_20190304_0001.png');
imshow abc_20190304_0001.png
L = imresize(I,.25,'bilinear');
figure, imshow(L);

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KSSV
KSSV 2021-9-8
imgNames = dir('*.png') ; % give your exntenion of images in the folder
N = length(imgNames) ; % toal number of images
% loop for each image
for i = 1:N
thisImg = imgNames(i).name ;
I=imread(thisImg);
figure(1)
imshow(I) ;
L = imresize(I,.25,'bilinear');
figure(2)
imshow(L);
end
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Joydeb Saha
Joydeb Saha 2021-9-8
Can you just make me understand the last two lines...
consider my path name is : E:\MW\Channel
and I want to save it in the same folder as : abc_20190304_0001, abc_20190304_0002 ....abc_20190304_0095 etc
Image Analyst
Image Analyst 2021-9-8
You can use sprintf()
baseFileName = sprintf('%4.4d.png', i); % 0001.png for example.
fullOutputFileName = fullfile(outputFolder, baseFileName);
imwrite(L, fullOutputFileName);

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更多回答（1 个）

Joydeb Saha
Joydeb Saha 2021-9-8
well the problem is solved

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