Re: EXIF support in PNG
John Bowler <[email protected]>
| Newsgroups | gmane.comp.graphics.png.general |
|---|---|
| Message-ID | <CAP7U398f++kjVYW4ChhxO66FwK5HGd4LkYKCXZTGx3oDsz3emg@mail.gmail.com> |
Attached and below is an update proposal removing the 20170102 unsafe-to-copy designation. ================================================================ PNG CHUNK PROPOSAL: eXIf SPECIFICATION ============= The four-byte chunk type field contains the decimal values 101 88 73 102 The eXIF chunk contains EXIF metadata with a length given by the chunk length. Such data shall be compatible with specifications issued by CIPA, "Exchangeable image file format for digital still cameras" [CIPA DC-008-2016] or its successors. At most one eXIF chunk shall occur in a PNG stream. The chunk has no chunk-specific positioning requirements; it may appear before or after the IDAT chunks. ================================================================ -- John Bowler <[email protected]> +1 (541) 450-9885 PO BOX 3151 KERBY OR 97531-3151 USA ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ png-mng-misc mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/png-mng-misc
20170103 eXIf.txt
(text/plain, 545 B)
PNG CHUNK PROPOSAL: eXIf SPECIFICATION ============= The four-byte chunk type field contains the decimal values 101 88 73 102 The eXIF chunk contains EXIF metadata with a length given by the chunk length. Such data shall be compatible with specifications issued by CIPA, "Exchangeable image file format for digital still cameras" [CIPA DC-008-2016] or its successors. At most one eXIF chunk shall occur in a PNG stream. The chunk has no chunk-specific positioning requirements; it may appear before or after the IDAT chunks.