png metadata

Toby Kelsey toby_kelsey at
Thu Jan 26 13:14:57 UTC 2006

Duncan Lithgow wrote:
> Does anyone know what can write metadata in a png file?
> I'm looking for a good way of embedding information about some
> historical images _into_ the image itself - so they never get seperated
> from each other.
> Suggestions anyone?
> Duncan

I don't think there is a standard convention for adding comments in png, although mentions the 'iTXt', 'tEXt' and 'zTXt' chunks.

The 'convert' program can add comments for 'supported formats', whether this includes PNG I don't know.

A google search found these relevant pages:

There is one program 'pngmeta', which can handle metadata and might do what you want:

Let us know how you get on.


More information about the ubuntu-users mailing list