Need to add new metadata to image file

[Jim Cant]

I need to find a way to programatically add new metadata to image files (jpg, tiff, dicom);  this data would be the results of image analysis done interactively.  These would be fields/tags that did not not exist in the original image file.

Also, how is the metadata of an image file represented within ImageJ once a file is loaded.  All I've been able to discover is the FileInfo object which seems very generic; it's not clear, for example, where a user-defined tag from a tiff file would show up.  Actually, I would have expected a class for each image file type (each likely an extension of a common base class.)

I would expect the solution to my problem would be to create new additions to the internal representation of my image then write all this out to a file.

Any pointers, suggestions, hints, or actual solutions would be greatly appreciated; I thank you in advance.

Thanks,
Jim Cant

[Frederic V. Hessman]

Each image has a Properties object, so you can simply manipulate  
information in strings via

        void myPluginMethod (ImagePlus imp)
                {
                Properties props = imp.getProperties;
                props.setProperty ("PI", "3.1415926");
                String oldInfo = props.getProperty ("myOldInfo");
                }

This info can thus be used immediately during the interactive session.

The only problem is to pack this info back into the output image  
files - I'm working on doing this for FITS images (which has a rich  
header info syntax) but I don't have any experience with tiff et al.  
(some, I believe, support general purpose header info).

Rick

On 22 Feb 2007, at 2:15 am, Jim Cant wrote:

> I need to find a way to programatically add new metadata to image  
> files (jpg,
> tiff, dicom);  this data would be the results of image analysis done
> interactively.  These would be fields/tags that did not not exist  
> in the
> original image file.
>
> Also, how is the metadata of an image file represented within  
> ImageJ once a
> file is loaded.  All I've been able to discover is the FileInfo  
> object which
> seems very generic; it's not clear, for example, where a user-
> defined tag
> from a tiff file would show up.  Actually, I would have expected a  
> class for
> each image file type (each likely an extension of a common base  
> class.)
>
> I would expect the solution to my problem would be to create new  
> additions
> to the internal representation of my image then write all this out  
> to a
> file.
>
> Any pointers, suggestions, hints, or actual solutions would be greatly
> appreciated; I thank you in advance.
>
> Thanks,
> Jim Cant
> --
> View this message in context: http://www.nabble.com/Need-to-add-new- 
> metadata-to-image-file-tf3270337.html#a9092548
> Sent from the ImageJ mailing list archive at Nabble.com.

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Dr. Frederic V. Hessman     [hidden email]
Institut für Astrophysik          Tel.  [phone]
Friedrich-Hund-Platz 1         Fax [phone]
37077 Goettingen                 Room F04-133
http://www.Astro.physik.Uni-Goettingen.de/~hessman
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