Monitor profiling poll #1

[UncleDoug]

Hey all.

I'm trying to gain some insight into how you all are setting up your monitor when you profile your monitor.

All I have is 2 simple questions which will require 2 posts/polls.
So please, if you could answer both that would be great!:D

[CyberPet]

2.0

[GTogs]

Standard PC setting, I believe 2.0

[Jesper]

Standard PC setting, I believe 2.0
No, the standard setting for PC is 2.2.

[CyberDyneSystems]

Can somone tell me where I would find the gamma setting?

My geforce utility calims 1.0... but I suspect that is not the same as what you are describing.

[Jesper]

Can somone tell me where I would find the gamma setting?

My geforce utility calims 1.0... but I suspect that is not the same as what you are describing.
The 1.0 of your video card is "on top of" the normal gamma setting. The gamma setting isn't usually something you can set on your monitor or video card. One of the steps in the calibration and profiling software of for example the Spyder asks you which gamma setting you want to use. It then creates a profile for your monitor with brightness curves for the chosen gamma setting.

See this for an elaborate explanation of monitor gamma:
Monitor calibration and gamma (http://www.normankoren.com/makingfineprints1A.html)

[CyberDyneSystems]

I found it in the Optical.. I actually use a "custom" curve.. t is a bit more than the 2.2 .. closer to 2.5 but not the same....

I did indeed start with 2.2 though.. then tweeked the curve. I belive this was neccesary to compensate for lighting environemnt of my workspace..

the colors looked very accurate compoared to the prints.. but the display was lacking in saturation and contrast that was visible in the prints.

[UncleDoug]

See this for an elaborate explanation of monitor gamma:
Monitor calibration and gamma (http://www.normankoren.com/makingfineprints1A.html)

Great info on Gamma!!!!
Just about anything you could wish to know.

However, some of the other logic on the site does not sit well.
The info gleaned from this poll will help to illustrate my point.
I'll be posting soon.

[Debian Dog]

2.0

Since Mac is 1.8 and PC 2.2 are you just splitting the difference?

[UncleDoug]

Using Apple's ColorSync Calculator, similar to a product by Bibble Labs, I happened upon a trail of interesting info.

I knew that various working spaces were based on different ref white points but did not know how or if this had any effect what so ever on my color workflow.

As a mater of fact, here are the settings each working space was created around.
Gamma first, white point standard second.
Adobe RGB 2.2, D65
sRGB 2.2, D65
BestRGB 2.2, D50
EktaSpace 2.2, D50
ProPhoto 1.8, D50

Gamma is, in essence, how middle grey is displayed.
Now using the ColorSync Calculator to compare the numbers of a middle grey in RGB vs. LAB using Absolute colorimetric;

sRGB and AdobeRGB; a middle grey displays with LAB coordinates of (L)53.3913 (A)-1.4219 (B)-11.5625
BestRGB and Ektaspace display LAB coordinates of (L) 53.7896 (A)0 (B)0
ProPhoto display LAB coordinates of (L) 60.5325 (A)0 (B)0

sRGB and AdobeRGB's ref white, D65, is significantly blue - in appearance and thus by the numbers, see above.
BestRGB and EktaSpace are just a hair lighter than a true LAB 50,0,0 but still neutral, i.e. no color "contamination", because of the ref white point of D50 - the ICC standard ref white point.
ProPhoto is even lighter in it's middle grey.

Big freaking deal!
Right?

Wrong!

The ICC standard ref white is D50 or 5000°k.
All the calculations going on in the background of color management are based on D50.
So, by using a profile that is not based on D50 could skew numbers and thus your color a bit.
Also, as you can see, by using a working space based on D65 you are changing the middle grey of your image info and thus gamma. Granted the other two cases had shifts as well, but only along the grey axis, not on A or B.

I'll link this diatribe to some of the info in the link jesper had mentioned here later......
Got to work!

[Debian Dog]

For Discussion. My Mac w/ an old 22" LCD cinema display

Changed my desktop to grey and went through the advanced calibration setup (which was a 5 step, color matching, process)

Here are the results:



(seems like I should have note scaled the screenshot. Hard to read :( )

[PacAce]

For Discussion. My Mac w/ an old 22" LCD cinema display

Changed my desktop to grey and went through the advanced calibration setup (which was a 5 step, color matching, process)

Here are the results:



(seems like I should have note scaled the screenshot. Hard to read :( )
Just noticed that your native gamma is 1.8 (or is that 1.95? Hard to read. :confused: ). Anyway, the recommended native gamma if you are using Photoshop is 2.2 rather than the default of 1.8 on the Mac.

[Debian Dog]

I did not pick that number it was the one selected... <shrug> Do I just force the 2.2? I looked at it and it did not look "bad" that way.

[Debian Dog]

I re-ran it. It went A LOT FASTER this time being the settings were about dead on. I forced the 2.2 but it says it has it as a "target"?

[UncleDoug]

I re-ran it. It went A LOT FASTER this time being the settings were about dead on. I forced the 2.2 but it says it has it as a "target"?

Any way you could e-mail the profile you created?

Love to take a gander at it!:D

[Debian Dog]

Sure I will PM it to ya if it is not too big.