In message , R.Wieser
writes:
[]
And by the way: GDI+ (which contains the support for EXIF properties) does
not know how to write an EXIF property into a PNG image.

"EXIF Pilot" can; it _could_ be proprietary or a special, but it presents
it under an EXIF tab, _implying_ it's part of some standard.

:-) When you use third-party programs all bets are off. Nothing stops a

Of course. Though see below.

program from putting or extracting an EXIF (or any other meta-data
containing) blob into/from one of the earlier mentioned PNG "chunks". Same
goes for other image formats ofcourse

As for "some standard" ? Yeah, I guess so. As long as that means "the
way that I (the program) did it" :-p

Regards,
Rudy Wieser


So far, I've found (for JPEG files):

Windows Explorer (I'm on Windows 7) (not a "third-party" software, I'd
venture) can add text (header in Explorer is "Comment:") that IrfanView
can see, though not edit (displays it inside IV under EXIF with the
header "XPComment"). That's the only heading there (in IV - EXIF). [Try
it to see what I mean.]

EXIF Pilot can add text that Windows Explorer displays (still under
"Comment:" in Explorer; replaces that _in Explorer_ put there earlier
using Explorer). If that file is immediately examined in IrfanView, it
shows (but still can't edit) under EXIF, _both_ lots of text: that put
there earlier using Windows Explorer still shows by "XPComment", whereas
that added by EXIF Pilot shows by "UserComment".

If I now _edit_ the text in Explorer, and then yet again examine the
file in IrfanView, the changed text appears, under "XPComment", with
"UserComment" having disappeared - not just the text, but the heading as
well.

Comment text entered (just under Comment) using IrfanView is displayed
by Brother's Keeper (optionally, as several image softwares/sources just
put their own name there, and BK users mostly don't want to see those).
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

If a cluttered desk is characteristic of a cluttered mind, what does an empty
desk mean ?