is it possible to display the size of an image in MB or KB on matlab?????? if yes how??

plezzz hel asap!!

[Stephen23]

https://www.mathworks.com/matlabcentral/fileexchange/33174-number-to-scientific-prefix

N = imfinfo('cameraman.tif').FileSize;
[num2sip(N),'B'] % SI prefix

ans = '65.24 kB'

[num2bip(N),'B'] % binary prefix

ans = '63.711 KiB'

Answer 1

[Raghava S N]

Hi Pradeep,

Yes, it is possible to display the size of an image in MB or KB in MATLAB. You can achieve this by calculating its size based on the number of bytes it occupies in memory.

The image size can be calculated using the “imfinfo” function. The “FileSize” output argument of the “imfinfo” function returns the size of the file in bytes. More information about extracting metrics about a graphics file using the “imfinfo” function can be found in this link - https://www.mathworks.com/help/matlab/ref/imfinfo.html#:~:text=character%20vector-,FileSize,-Size%20of%20the.

Here is some sample code to find the size of a graphics file in MATLAB –

imageFilePath = 'path_to_your_image.jpg'; % Replace with your image file path
% Get the size of the image in bytes
info = imfinfo(imageFilePath);
imageSizeInBytes = info.FileSize;
% Convert bytes to KB and MB
imageSizeInKB = imageSizeInBytes / 1024;
imageSizeInMB = imageSizeInKB / 1024;

Hope this helps!

[Stephen23]

"Firstly, use the “imread” function to load your image into MATLAB."

Why is that required?

Although your code imports the image data into IMAGEDATA, it does not use it for anything.

[Raghava S N]

You are quite right. imread is not necessary here. That's an oversight from my end. Will edit it out soon.

[DGM]

OP never clarified what they were actually asking for (other than it should be asap). Decoding the image may be relevant.

% a filename
fname = 'llama.jpg';

% size of file on disk (in kB)
Nfile = imfinfo(fname).FileSize/1E3

Nfile = 135.4700

% size of image in memory (in MB)
inpict = imread(fname);
Nmem = whos('inpict').bytes/1E6

Nmem = 3.4532

Alternatively, attached is a little convenience tool I use

% MIMT memsize() just dumps to console if no output is specified
memsize(inpict,'kB')

3453.192 kB

memsize(inpict,'MB')

3.453 MB

memsize(inpict,'MiB')

3.293 MiB

% but it can produce numeric output as well
Nmem = memsize(inpict,'MB')

Nmem = 3.4532

We can only hope we're not too late to save Pradeep.

[Pradeep Gowda]

Well Well, I finally got my answer after 9 years.

Thanks a lot folks.

This was for my college project😅. I figured it out after posting the question here.