Color Calibration and Your Monitor

[sPECtre]

I'll try to gather some info about prophoto RGB. Do not use it in 8 bit mode! It is mostly useful for Photographers shooting in RAW format. Adobe Camera Raw's native format is PPRGB too.

Why use ProPhoto (Uwe Steinmuller) : http://www.outbackphoto.com/color_ma..._06/essay.html

Understanding ProPhoto (Michael Reichmann) :
http://www.luminous-landscape.com/tu...hoto-rgb.shtml

Beyond Adobe RGB (Matt Hagadorn) :
http://www.naturephotographers.net/a.../mh1203-1.html

A PDF about PPRGB by Kodak:
http://www.kodak.com/global/plugins/...bPhotoshop.pdf

I think that most major Color Management gurus do use ProPhoto: Ian Lyons, Bruce Fraser, Andrew Rodney, and Martin Evening. That said, the changes made in Pro Photo can be quite drastic, use with caution! The fact that experts use it means two things: they recognize its superiority in certain cases, but they also know how to manipulate files in that color space...

[gare]

Funny you should mention Bruce Frasier; he developed Bruce RGB for use in PS a few years back.

I recommend that whether an image is natively captured in 8 or 32-bit, if adjustment is necessary, convert it to 48-bit--the Levels command produces much more smooth results; when you're happy, you then dither down to 8 for print or Web display. I've found less data color space clipping when you work in 32-bit.

My Best,

Gare

[sPECtre]

I take that you mean 48bits? usually referred as 16 bit/channel, vs 24 bit aka 8bit/channel.
Some prefer to lay gradients in that bit depth, indeed there is some dithering when going 16>8bit, it is sometimes welcomed.

[gare]

Yes, I meant 48-bits; sorry. The dithering back to a "normal" color space I've seen is minor. I've never tried the gradient trick--I will, though.

My Best,

Gare

[sPECtre]

No prob , I just wanted to point out the correct terminology for newcomers or beginners.