Re: Kelvin Relevance in Fine Art?
Re: Kelvin Relevance in Fine Art?
- Subject: Re: Kelvin Relevance in Fine Art?
- From: "tlianza" <email@hidden>
- Date: Wed, 2 Feb 2005 23:14:42 -0500
Hi to all,
I thought I would chime in on this discussion. It's important for everyone
to understand that the selection of D50 was not aimed at making images look
good, it was aimed at being able to EASE THE EVALUATION OF DIFFERENCES
between images. That was one of the compromises in it's choice. For
critical difference measurements, many researches argued for a HIGHER COLOR
TEMPERATURE. As I remember, there were many recommendations to use D75 for
critical press-proof comparisons. The problem was at these higher CT's the
images didn't look good and the fact that there was detectable difference
between the print and proof didn't mean that much if neither image looked
acceptable. There was also a need for evaluation at relatively high
illuminances (500 to 2000 lux) to maintain median state of adaptation. When
this standard was first proposed as an Ansi Photographic Standard, I was in
college and I wrote the organization a letter expressing my opinion, that
D50 was representative of NOTHING and a really poor choice. First, it was
physically unrealizable, so it would have a huge impact on the
interpretation of measured objects with respect to reproduced scenes.
Second, it was too high in CT to represent any real life presentation
mechanism. Nearly all home lighting of the time (late 60s early '70s) was
well below that (including fluorescents) . The reason that tungsten is
popular is because it is cheap and the images look good (with the exception
of images from the Epson 2200) . From the standpoint of illuminating fine
art masters, tungsten is probably far more representative of the lighting
that the artist used when painting (torch or candle). It's not a bad
choice.
Take care
TL
Tom Lianza
Director of Display and Capture Technologies
GretagMacbeth LLC
3 Industrial Drive
Unit 7&8
Windham, NH 03087
603.681.0315 x232 Tel
603.681.0316 Fax
_______________________________________________
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