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

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
    plot(x,x.^3)

    saveas(fig(1),'fig.jpg')

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';

imwrite(i,'figC.jpg')

QUESTIONS:

1. Is what I'm trying possible?
2. If so, how?

Many thanks.

[Stephen23]

imwrite(...,'Comment','blah')

or

http://www.mathworks.com/matlabcentral/fileexchange/42000-run-exiftool

[Pawel Jastrzebski]

Thanks.

Answer 1

[C.J. Harris]

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')

[Pawel Jastrzebski]

Thanks, it worked. I've run a few trials:

fileName = 'fig.jpeg';
i = imread(fileName);

imwrite(i,'figC.jpeg',...
    'Comment','JPEG: Made with script version 1')

imwrite(i,'figC.png',...
    'Comment'    ,'PNG: Made with script version 1',...
    'Author'     , 'PJ',...
    'Description','simple plot',...
    'Copyright'  ,'Open')

imwrite(i,'figC.tiff',...
    '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