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Matlab source code for Image compression algorithm
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Rishav
on 16 Mar 2014
Locked: Steven Lord
on 30 Jul 2024 at 14:53
I need a source code for image compression algorithm that will read the image and then compress it and save it in another folder. There is no need to display the image while executing. It would be more helpful if the source code works on multiple files through a loop. p.s i am working in matlab 2010a
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Accepted Answer
Image Analyst
on 16 Mar 2014
originalImage = imread(inputfilename);
[inputFolder, baseFileName, ext] = fileparts(inputfilename);
% Write as compressed JPG or PNG or whatever.
outputFileName = fullfile(outputFolder, [baseFileName, '.jpg']);
imwrite(originalImage, outputFileName);
13 Comments
doaa
on 6 Nov 2022
if you be exist to the code ,can you sent to me because i need it and doesn't reach for any code
Walter Roberson
on 6 Nov 2022
doaa, we have been discussing multiple programs, and we do not know which one you want.
More Answers (2)
Sufyan Parkar
on 26 Sep 2019
Edited: DGM
on 8 Apr 2024
Well Steven Lord,
I have tried to write a code myself.
Please try to assist me here.
clc;
clear all;
close all;
a = imread("location");
ag = rgb2gray(a);
imshow(a)
z = zeros(size(ag));
[x y] = size(ag);
for i = 1:x
z(i,1) = ag(i,1);
for j = 2:y
z(i,j) = ag(i,j-1) - ag(i,j);
end
end
disp(z)
figure()
imshow(z)
1 Comment
Walter Roberson
on 26 Sep 2019
That code does no image compression. It tries to find the difference between adjacent pixels, perhaps in preparation for delta encoding. However, you will find that ag is likely uint8 and when you subtract a larger uint8 from a smaller you get 0 rather than negative. If you were to take care to double(ag) then you could get negative. However you are storing the results in double() and imshow of double with negative values might not give you the results you expect. Does it make sense to display the difference between adjacent pixels as if it were itself an image?
By the way: read about diff()
khadija elazrag
on 27 Oct 2019
Hi i need source code for DNA comprission by using huffman algorithm
6 Comments
mousa
on 30 Jul 2024 at 14:24
hi i need code to do this,Give an example of image compression using MATLAB code.
Image Analyst
on 30 Jul 2024 at 14:44
@mousa just save your image variable as a JPG or PNG image file
imwrite(rgbImage, 'compressed image.jpg'); % Lossy compression
imwrite(rgbImage, 'compressed image.png'); % Lossless compression
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