reading multiple images from a folder in Matlab
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I want to read many images from a folder in the Matlab directory using imread() and then make different operations in every image individually , i wrote this code but it disagrees about (+k+):
num_file=1;
file = dir('image.orig');
num_file = numel(file);
NF=num_file;
Y=1;Z=1;
images = cell(1,NF,T);
T=cell(Y,Z,3);
for k = 1:NF
images{1,k}(Y,Z,3) = imread('C:Work\image.orig\'+k-1+'.JPEG');
end
also, i want to save the matrix of each image in a cell array and i don't if what i wrote is right or not and i cannot have a permission to read from the folder, i checked the folder and found that it is read only, what do you think?
Thank you in advance
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Walter Roberson
2011년 11월 7일
file = dir('image.orig');
NF = length(file);
images = cell(NF,1);
for k = 1 : NF
images{k} = imread(fullfile('image.orig', file(k).name));
end
댓글 수: 8
Walter Roberson
2011년 11월 10일
I would put a breakpoint in and check each step -- for example, does file come out empty?
Check to be sure that you have not accidentally created your own dir.m or imread files:
which -all dir
which -all imread
추가 답변 (4개)
Image Analyst
2011년 11월 8일
It's always worth throwing in a plug for the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F
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yasmine
2011년 12월 8일
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Walter Roberson
2011년 12월 9일
I think this should definitely have gone in its own thread ;-)
You are trying to apply imhist() to a (subsection of) a truecolor image (which is thus a 3D matrix). imhist() is only for grayscale images. You should convert your whole image to grayscale before you break it up in to blocks; or you should convert each block to grayscale and imhist that as you go; or you should imhist() each of the three color planes separately.
Shaveta Arora
2016년 4월 9일
If I have .tiff images and .tif images that I want to read, how they can be read ? I know how to read one type of images but how to read two types of images.
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Walter Roberson
2021년 6월 18일
@Emily LeungIn the code I posted here, the filenames would come up empty if you do not have any .tif or .tiff files in the current directory.
In some cases, depending upon operating system configuration, files ending with extension .TIF or .TIFF might not be treated as if they ended in .tif or .tiff -- sometimes files are case sensitive.
The code I posted is not designed to look for files in a different directory; the changes to look in a different directory are not difficult though.
Emily Leung
2021년 6월 18일
@Walter Roberson i solved the issue, thank you very much this approach saved me many an if loop!
Kumar Vaibhav
2016년 8월 1일
편집: Walter Roberson
2016년 8월 1일
I=imread(sprintf('C:/Users/kumar.vaibhav/Documents/MATLAB/Visually Similar Images/%d.jpeg',i));
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