How to add 'Description' to '.jpeg'?

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Once I've generated a plot and saved it as .jpeg, I'd like to add a description to it i.e.:
  • 'This plot was created with script version 01'
The code for saving the plot is simple:
x = 0:0.1:4
fig(1) = figure
And then I tried to access the image info to modify it but to no avail:
fileName = 'fig.jpg';
i = imread(fileName)
info = imfinfo(fileName)
info.Comment = 'Made with script version 1';
  1. Is what I'm trying possible?
  2. If so, how?
Many thanks.

Accepted Answer

C.J. Harris
C.J. Harris on 20 Mar 2018
If you're only interested in the 'Comment' field, then you can set it directly:
imwrite(i,'figC.jpg', 'Comment', 'Made with script version 1')
  1 Comment
Pawel Jastrzebski
Pawel Jastrzebski on 21 Mar 2018
Thanks, it worked. I've run a few trials:
fileName = 'fig.jpeg';
i = imread(fileName);
'Comment','JPEG: Made with script version 1')
'Comment' ,'PNG: Made with script version 1',...
'Author' , 'PJ',...
'Description','simple plot',...
'Copyright' ,'Open')
'Description','TIFF: script version 1')
However what I have established is that:
  • A viewer such as IrfanView is needed to see the comment as it doesn't appear on the property section when I right-click on the file
  • When I use other file formats, I still cannot see it under the properties of a file
  • Using Irfanview I cannot see the comments for '.png' and '.tiff
  • The comments will show up in GIMP for all three extensions
  • And lastly, .png offers even more flexibility in adding information to the file which is exactly what I might need for the tractability, I just need to figure an easy way of checking up the details on Windows

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