Reading Multiple Images from Folder

Question

Chandra Shekhar 2013-1-25

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59847-reading-multiple-images-from-folder

编辑： Stephen23 2021-4-18

I have a folder named 'ImageSet1',it consist of 20 images named as a 1.jpg,2.jpg...20.jpg.

Here i want to read images from 1 to 10 and then from 11 to 20 separately. it means, when i read image 1,immediately i have to read 11th image and when i read image 2,immediately i have to read 12th image in a loop and so on.. Here is the my code

sdirectory = 'ImageSet1';

jpegfiles = dir([sdirectory '/*.jpg']);

for k = 1:length(jpegfiles)/2

filename = [sdirectory '/' jpegfiles(k).name];

I = imread(filename);

figure;imshow(I)

filename1=[sdirectory '/' jpegfiles(10+k).name];

I1=imread(filename1);

figure;imshow(I1)

end

This code is not reading in order,like 1 and 11th image,2 and 12th image...

Does any one know please correct this code or any other method..?

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Stephen23 2015-5-27

编辑：Stephen23 2015-5-27

在 MATLAB Online 中打开

A simple solution is to use my FEX submission natsortfiles

http://de.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

It sorts according to any numeric values in the strings, and also sorts the file extensions separately:

B = {'test2.m'; 'test10-old.m'; 'test.m'; 'test10.m'; 'test1.m'};
sort(B) % wrong numeric order!
 ans = {
    'test.m'
    'test1.m'
    'test10-old.m'
    'test10.m'
    'test2.m'}
natsortfiles(B) % correct numeric order and shortest first:
 ans = {
    'test.m'
    'test1.m'
    'test2.m'
    'test10.m'
    'test10-old.m'}

Stephen23 2015-5-27

编辑：Stephen23 2021-4-18

在 MATLAB Online 中打开

A simple solution is to use my FEX submission natsortfiles

http://de.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

>> S = dir('*.txt');
>> S.name
ans =
    '1.txt'
ans =
    '10.txt'
ans =
    '2.txt'
>> S = natsortfiles(S); % alphanumeric sort by filename
>> S.name
ans =
    '1.txt'
ans =
    '2.txt'
ans =
    '10.txt'

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Answer 1

Evgeny Pr 2013-1-25

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59847-reading-multiple-images-from-folder#answer_72371

编辑：Evgeny Pr 2013-1-25

在 MATLAB Online 中打开

Use natural sorting for image filenames.

http://www.mathworks.com/matlabcentral/fileexchange/10959-sortnat-natural-order-sort

Listing = dir(fullfile(directoryPath, '*.jpg'));
names = {Listing.name}';
names = sort_nat(names);
fullNames = cellfun(@(x) fullfile(directoryPath, x), names, 'UniformOutput', 0);