reading multiple images in a folder (imread)

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Ok so I want to read 10 different images into matrices in Matlab. the images are saved as image001, image002 etc. up to image010. I tried this loop thinking it would work:
for n=1:10
image_{n}= imread(sprintf('image00%s.png',num2str(n)));
end
but it came up with the error:
??? Error using ==> strfind
Input strings must have one row.
Error in ==> imread at 340
if (strfind(filename, '://'))
it also would read the last image as image0010, which is not right. I then thought I could just do this:
for r= 1:10
sprintf('scan_%s', num2str(r)) = imread('*.png','png');
end
Because i thought that by putting "*.png" it would read all the images in the folder. But I go this error:
?? Error using ==> imread at 408
Can't open file "*.png" for reading;
you may not have read permission.
can someone see where I went wrong in my coding or suggest a better way to do it?
Thanks
  1 个评论
Udaynarayansingh Kushwaha
% I have the code that read only 4 images and show using subplot function. But can someone suggest me that how I show more then 4 images in matlab without subplot function.
clc;
clear all;
for i=1:4
FileName=uigetfile({'.'});
im=imread(FileName);
subplot(2,2,i);
imshow(im);
end

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采纳的回答

Walter Roberson
Walter Roberson 2011-5-13
for n=1:10
images{n} = imread(sprintf('image%03d.png',n));
end
See also this FAQ and this one
  5 个评论
atyaf hekmat
atyaf hekmat 2021-11-26
Mr. @Mohammed Hammouda Can you help me make a code to read images from a folder with subfolders in which there are multiple images. I want to get its features by eucledean distance...with all of my thanks
Nathnael Esayas Bulti
@atyaf hekmat did you manage to figure out how to read images from a folder with subfolders by any chance?

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更多回答(1 个)

Walter Roberson
Walter Roberson 2016-12-18
Your line
filename = strcat('E:\EXTRACT\Motorcycle\Pos*.jpg',srcFiles(i).name);
Should not have the 'Pos*.jpg' part of the string.
I recommend that you learn to use fullfile()
  1 个评论
misbah khan
misbah khan 2021-1-6
hi i want to ask i am using the below code for reading multiple image but i want another folder to read the images in the same code how i modify this.i just want to read other folder not applying the same function for the second folder?
srcFile=dir('/MATLAB Drive/Published/*.bmp');
for i=1:length(srcFile)
filename=strcat('/MATLAB Drive/Published/', srcFile(i).name);
I=imread(filename);
im=rgb2gray(I);
path=strcat('/MATLAB Drive/Published/',srcFile(i).name);
imwrite(I,path);
end

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