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Photo Retouching "Improving" photos, post-production, correction, etc.

Which color profile to use?

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  #1  
Old 10-04-2010, 08:19 AM
qpixo qpixo is offline
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Which color profile to use?

I did a retouch example (test) and it was saved at TIF file, Profoto RGB profile, 16bits.

However when I selected Assign Profile in PS to my calibrated spyder pro 3 or sRGB, the color look awnful.

Usually I was always using sRGB (for two copies one for Web and other for print). However this time when I switched to My Spyder Pro 3 calibarated profile in PS, I noticed the color suddenty changed (skin tone turned really pale) in my Print preview screen. Now with that Profoto RGB profile is there a method in PS if I want to print this file??

I would like to have two copies one publish on Web and other for print.
As far as I know, sRGB loose a lot of color

Last edited by qpixo; 10-04-2010 at 09:04 AM.
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Old 10-04-2010, 09:23 AM
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mistermonday mistermonday is offline
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Re: Which color profile to use?

Qpixo, if you are trying to convert from one color profile to another you should NOT be using the Assign coomand. For conversion, you should use Edit>Convert to Profile.
The Assign command is used to inform PS what color profile an image is currnetly in, so that PS can display it properly. The command is used primarily when you ask PS to open an image that has not been tagged with a color profile so photoshop will automatically assume the image's profile is the same as PS current color workspace.
If you have an image edited an image in Prophoto and you now use the assign command to tell PS that the image is in Adobe RGB or sRGB or almost any other color space, PS will display the image in that space and it will look pretty ugly.
Regards, Murray
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Old 10-04-2010, 09:57 AM
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Re: Which color profile to use?

Assign profile doesn’t alter the RGB values, it only updates their definition (their scale). The number are in ProPhoto RGB as they should be. Updating the definition using Assign makes those number look awful because they are incorrectly being displayed because you lied to Photoshop. Assign profile is useful for untagged data, images without a profile. Photoshop has to guess what the scale is (it guesses based on the RGB working space you set in color Prefs). You have to Assign a profile so the numbers ARE properly defined and look correct. That’s the only time you’d use Assign profile.

IF you have Adobe RGB and want sRGB numbers, you use Convert to Profile and save out a new iteration. That changes the numbers and that’s why they now look correct.
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Old 10-04-2010, 11:02 AM
qpixo qpixo is offline
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Re: Which color profile to use?

Understood different now. I can see color look correct when I selected convert to Profile then choose sRGB profile for Web.

But my concern is Print purpose. Should I choose CMYK in advanced option if offer CMYK (Working CMYK - US Web Coated SWOP v2)??

I'm using ProPhoto RGB as default not Abode RGB.


Here's current setting that I have:
http://i232.photobucket.com/albums/e...rt_profile.jpg


Thanks a lot,

Quote:
Originally Posted by andrewrodney View Post
Assign profile doesn’t alter the RGB values, it only updates their definition (their scale). The number are in ProPhoto RGB as they should be. Updating the definition using Assign makes those number look awful because they are incorrectly being displayed because you lied to Photoshop. Assign profile is useful for untagged data, images without a profile. Photoshop has to guess what the scale is (it guesses based on the RGB working space you set in color Prefs). You have to Assign a profile so the numbers ARE properly defined and look correct. That’s the only time you’d use Assign profile.

IF you have Adobe RGB and want sRGB numbers, you use Convert to Profile and save out a new iteration. That changes the numbers and that’s why they now look correct.

Last edited by qpixo; 10-04-2010 at 11:31 AM.
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Old 10-04-2010, 11:32 AM
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Re: Which color profile to use?

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Originally Posted by qpixo View Post
But my concern is Print purpose. Should I choose CMYK in advanced option if offer CMYK (Working CMYK - US Web Coated SWOP v2)??
ONLY if the output device confirms to SWOP v2. What’s the output device?
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Old 10-04-2010, 12:07 PM
qpixo qpixo is offline
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Re: Which color profile to use?

I have a Epson stylus r1900 as printer and Spyder Pro 3 to calibrate.

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Originally Posted by andrewrodney View Post
ONLY if the output device confirms to SWOP v2. What’s the output device?
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Old 10-04-2010, 12:19 PM
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andrewrodney andrewrodney is offline
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Re: Which color profile to use?

Quote:
Originally Posted by qpixo View Post
I have a Epson stylus r1900 as printer and Spyder Pro 3 to calibrate.
You would use the paper profile the driver installs based on the paper you are printing to.
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Old 10-04-2010, 12:32 PM
qpixo qpixo is offline
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Re: Which color profile to use?

U mean the paper size choice of my Epson? in Print option of PS?
Color Handling: Printer Manages Colors

I don't need to convert profile to CMKY?

Quote:
Originally Posted by andrewrodney View Post
You would use the paper profile the driver installs based on the paper you are printing to.
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Old 10-04-2010, 12:35 PM
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andrewrodney andrewrodney is offline
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Re: Which color profile to use?

Quote:
Originally Posted by qpixo View Post
U mean the paper size choice of my Epson? in Print option of PS?
Color Handling: Printer Manages Colors

I don't need to convert profile to CMKY?
No, the Epson is an RGB output device. You send it RGB.
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  #10  
Old 10-04-2010, 12:53 PM
qpixo qpixo is offline
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Re: Which color profile to use?

Therefore for print, I would keep it ProPhoto RGB or convert it to sRGB?

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Originally Posted by andrewrodney View Post
No, the Epson is an RGB output device. You send it RGB.
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