> is there a PNG chunk type defined for Exif data? > If not, is there any reason for not having it? That's an old problem of self-documentation for PNG images. The PNG specification allows labeled text (ASCII or UTF-8) elements to be embedded in text chunks and predefines a few standard keywords (element labels): Title, Author, Description, Copyright, Creation Time, Software, Disclaimer, Warning, Source, Comment but not in Exif format . An attempt in 2000 to develop open source tools to convert EXIF images (including EXIF metadata) to PNG seems to have been abandoned. See http://pmt.sourceforge.net/exif/drafts/d020.html. --- Zoran http://www.rentalio.com/ http://www.punmiris.com/Received on Wednesday, 20 June 2007 15:33:16 GMT
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