Luminous Landscape Forum

Raw & Post Processing, Printing => Digital Image Processing => Topic started by: kaelaria on October 07, 2007, 02:34:50 pm

Title: Profile Proof/conversion
Post by: kaelaria on October 07, 2007, 02:34:50 pm
What am I missing here?

Bring up an image in PS that's in prophoto or aRGB.

Select sRGB as your proof and select Proof Colors.  On mine, I now see a slight shift, primarily a desaturation.

Now turn off proofing.

Convert the image to sRGB.

On mine, I barely notice a thing, certainly NOTHING like the proof effect.

Why are they not both rendering the same effect?
Title: Profile Proof/conversion
Post by: nik on October 07, 2007, 03:20:11 pm
This usually happens when you have 'preserve RGB numbers' selected.

When you initially set up your Custom Proofing Conditions what options do you have set?

I noticed that for my system (mac CS3) that the following conditions are true;

Device to Simulate: sRGB IEC61966-2.1
Preserve RGB numbers = Off
Rendering Intent: Relative Colormetric
Black Point Compensation: Activated

For the 'Convert to Profile' settings

Source Profile: Prophoto RGB
Destination Space Profile: sRGB IEC61966-2.1
Conversion Engine: Adobe(ACE)
Intent: Relative Colormetric
Black Point Compensation: Activated

Lastly, my monitor is calibrated (i1), Working colorspace is Prophoto RGB

-Nik





Quote
What am I missing here?

Bring up an image in PS that's in prophoto or aRGB.

Select sRGB as your proof and select Proof Colors.  On mine, I now see a slight shift, primarily a desaturation.

Now turn off proofing.

Convert the image to sRGB.

On mine, I barely notice a thing, certainly NOTHING like the proof effect.

Why are they not both rendering the same effect?
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Title: Profile Proof/conversion
Post by: kaelaria on October 07, 2007, 04:24:22 pm
Ah ha!  I know I had that unchecked as usual in CS2, I never checked it in CS3, but that was it!

Thanks