Re: [Openexr-devel] EXIF meta data attributes in headers

[Florian Kainz]

If this is the case, then we should just identify which pieces of information
that are contained in EXIF or XMP are needed but not present in OpenEXR, and
define standard attributes for them.  One advantage of this approach would
be that it would avoid duplicate data in EXIF/XMP and other OpenEXR attributes.

Thomas Lock wrote:
> Having personally coded for both, i would have to say please do not follow
> the EXIF or XMP standard approach. I have so many complaints on coding this
> stuff it's not even funny anymore. To make my point, i had to use approx. 5
> programs minimum (used more but only verified others) to full verify that
> data was written properly and readable in other applications. To my shock as
> i sort of expected more, Photoshop was not very accurate on several key EXIF
> metadata entries, XMP was written accurately.
>
> My only suggestions would be to identify only the key entries that would be
> needed and dump the rest, cause once you open that can of worms you also
> have to consider IPTC and GPS metadata. Then once identified try to avoid
> using rationals and please no pre and post calculations to properly adjust
> values (ex. Aperture value).
>
> Tom.
>
>
> ----- Original Message ----- 
> From: "Florian Kainz" <address@hidden>
> To: "Michael Wolf" <address@hidden>
> Cc: <address@hidden>
> Sent: Thursday, December 14, 2006 2:05 PM
> Subject: Re: [Openexr-devel] EXIF meta data attributes in headers
>
>
> > I must admit that I know next to nothing about EXIF and XMP,
> > but don't both have a standardized text representation?
> > If this is the case, then all it would take to store them
> > in an OpenEXR file would be a string attribute called,
> > for example, "EXIFdata" or "XMPdata".
> >
> >
> > Michael Wolf wrote:
> > > Hello,
> > >
> > > Sorry for being a bit late on the thread...
> > >
> > > On Wed, 13 Dec 2006 07:02:26 +0100, Florian Kainz <address@hidden> wrote:
> > >
> > > > what ѕort kind of information do you need to store?
> > > > As far as I can tell, there's quite a bit of overlap
> > > > between OpenEXR's "optional standard" attributes
> > > > and EXIF data.
> > > >
> > > > Piotr Stanczyk wrote:
> > > > > Hi all,
> > > > >
> > > > > Just wandering what, if any, thoughts people have on having a standard
> EXIF typed attribute.
> > > > > I'm sure there are various implementations out there, but is it worth
> having a common one?
> > > Has anybody looked at XMP? http://www.adobe.com/products/xmp/
> > > It may not be as common as EXIF, but it does have Adobe and the W3C
> behind it.
> > > Cheers,
> > > Mike
> >
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