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decodeJpeg

version 1.0.0.0 (1.08 KB) by Evgeny
decodes encoded JPEG array into a Matlab array (image)

5 Downloads

Updated 29 Oct 2015

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I was looking for this functionality for some time, but all file exchange submissions seem to be some custom decoders
Then on stackoverflow I found a snippet which uses java for decoding: http://stackoverflow.com/questions/18659586/from-raw-bits-to-jpeg-without-writing-into-a-file
This snippet worked for me and I am submitting it as a function here.

USAGE:
% get a stream of bytes representing an endcoded JPEG image
fid = fopen('football.jpg', 'rb');
data = fread(fid, Inf, '*uint8');
fclose(fid);

% decode jpeg
img = decodeJpeg(data);

% check results against directly reading the image using IMREAD
img2 = imread('football.jpg');
assert(isequal(img, img2))

Cite As

Evgeny (2020). decodeJpeg (https://www.mathworks.com/matlabcentral/fileexchange/53716-decodejpeg), MATLAB Central File Exchange. Retrieved .

Comments and Ratings (3)

Luis

It works also for PNG files! 2019a

JAI PRAKASH

Hi
Its a great approach.

If you know actual algorithm(what java object are doing) which converts raw bits to image.
Can you please share.

Because, may be the performance can be further improved by utilising GPU power.

Thanks

B S

Just I need, and worked pretty well!

MATLAB Release Compatibility
Created with R2015a
Compatible with any release
Platform Compatibility
Windows macOS Linux
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