Re: untagged RGB data
Re: untagged RGB data
- Subject: Re: untagged RGB data
- From: Andrew Rodney <email@hidden>
- Date: Fri, 19 Dec 2003 12:38:59 -0700
on 12/19/03 12:20 PM, Chris Murphy wrote:
>
I think it's asking for trouble, to have a bunch of non-color managed
>
apps capable of having inconsistent display of untagged images by
>
design. If you don't like sRGB, don't keep untagged images around. Tag
>
them with something appropriate. Untagged RGB workflows with user
>
selectable assumptions are bad news, it's not at all like untagged
>
CMYK.
The problem is there are a number of products that produced untagged files
closer to Adobe RGB (DSLR's). So there are products producing untagged RGB
that's not anything like sRGB. It would be nice to be able to pick Adobe RGB
in such cases. But I agree that untagged files are the problem here.
>
Before I can agree to having a user selectable assumed profile for
>
untagged images, I'd need to hear about specific examples why this is
>
really necessary.
The slew of DSLR cameras that allow the user to shoot into TIFF or JPEG and
pick "Adobe RGB" (quotes on purposes <g>) verses the two or three different
flavors of "sRGB" you can choice from (which alone should tell you how
confused the camera manufacturers are about color).
Which brings me to another point (why we might need more than sRGB). On the
Canon's (and I think others), you have THREE different sRGB options. How
dumb is that? I'm under the impression that sRGB is sRGB (you can certainly
see the guts of what sRGB is when viewing the custom space in Photoshop
where you can view the white point, gamma and chromaticity values). So how
can the camera manufacturers allow users to pick not one but THREE different
sRGB settings? Anyway, it's possible that some modification of the values
above could produce better color appearance since we all know the cameras
are not producing sRGB (let alone 3 variants). Some users might want to have
a way to assume a modified space FROM sRGB. Certainly not for the typical
users but nice to have. So I think a "back door" (maybe an advanced
preference that opens this back door), allows something other than sRGB to
be assumed for the untagged files.
Bottom line is I think options are in order. However, I have no problem
assuming all untagged files are sRGB until I run into a situation where they
clearly are not previewing correctly in which case, I need to get to that
back door and make a new (better?) assumption.
Andrew Rodney
http://www.imagingrevue.com/
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