Re: Embedded images in EXIF
John Bowler <[email protected]>
| Newsgroups | gmane.comp.graphics.png.general |
|---|---|
| Message-ID | <CAP7U398Z-j3sAsnTB_ML7RmUxZZ3hojLegGau0X9ZDE8-9edLg@mail.gmail.com> |
On Tue, Jan 3, 2017 at 5:51 AM, Glenn Randers-Pehrson <[email protected]> wrote: > > Yes, the NIKON EXIF/PNG that I posted does contain a thumbnail within the > preview. > It stops there, though, it isn't "turtles all the way down". It only > contains minimal information > (date, width, height): > The RX-100 was producing something that does not match the JPEG specification, but may match the EXIF one (I don't know), it was: SOI (JPEG start of image) APP1 (Exif APP1 at the head; identifies the image as an EXIF) <small thumbnail somewhere in here> .... (other app markers and JPEG data) EOI (JPEG end of image; a JPEG reader will stop here) <bytes of data my program skipped> SOI (second image; this is the 'preview') APP1 (Exif APP1 for preview) (no thumbnail this time!) .... EOI I've got some Nikon Coolpix images (my mother's camera this time, not my wife's), along with some Olympus ones (from a TG-1; my camera.) I'll take a look at those. John Bowler ------------------------------------------------------------------------------ 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