Re: Media Testing for maclife.de
Re: Media Testing for maclife.de
- Subject: Re: Media Testing for maclife.de
- From: Iliah Borg <email@hidden>
- Date: Fri, 5 Sep 2008 09:12:53 -0400
Dear Edmund,
profiles can be employed in a meaningful way in the
image rendering pipeline
Yes, they can be applied in a meaningful way; but the problem is -
currently one can argue he can do better without those profiles.
the Raw
converter is a place where existing profile technology can be applied
several times,
My biggest problem with applying profiles (even if in one step and in
one place) is that they add noise to the image. (On a side note,
interestingly enough Argyll was the lowest noisy solution - comparing
Adobe CMM, ColorSync, lcms and Argyll). If a converter wants to
provide good shadows, both in terms of noise and saturation - current
ICC specs are not really an option. We can extract data from a
profile, manipulate it in a certain way, and that allows a custom
profile to be applied. However, it is suboptimal compared to spectral
data we use for our own colour transforms in RPP.
On still another note, things could be much easier if camera makers
and / or sensor makers were providing spectral characteristics of CFAs
and IR filters they use in front of the sensor. That would for sure
allow much better results then profiles obtained from shooting colour
targets and edited to suite the taste of the folks in raw converter
development teams; or to provide results similar to the looks of
renditions through the converters designed by the cameramaker.
For a raw converter developer (small volume, enthusiast, OpenSource,
freeware type) it is hard to justify the price of the equipment
(including each camera he is going to support) and the labour of a
setup that would allow to determine the spectral responses with a good
degree of accuracy. As a result, the development of converters does
not have enough competition. One can develop a beautiful demosaicing
and wonderful UI but fails to provide acceptable colour - such a
converter is mostly dead at birth.
An initiative to specifically address camera profiling (that way or
another) in EXIF, DCF, and ICC standards is long overdue.
--
Best regards,
Iliah Borg
email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden