Effects blocked??

MF
Posted By
Michael_Fer
Jul 28, 2006
Views
337
Replies
7
Status
Closed
IN Photoshop CS, I am working on a project and sometimes effects are blocked out and I am not able to use them? Why is that?

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DR
Donald_Reese
Jul 28, 2006
By effects , do you mean filters? some work only in 8 bit.
CN
Cybernetic Nomad
Jul 28, 2006
And some won’t work in CMYK mode
MF
Michael_Fer
Jul 28, 2006
Yeah, filters. I put it at 16 bit. Isn’t that higher quality? what is CMYK?
DR
Donald_Reese
Jul 29, 2006
4-color, for offset press. it stands for cyan,magenta,yellow and black. 16 bit offers more room to play with your data,but i honestly am not sure if the benefits are the same as starting with a 16 bit file, verses converting up from 8bit. maybe cybernetic will lend some input on that.
MD
Michael_D_Sullivan
Jul 29, 2006
An 8-bit RGB image is compatible with all filters. A 16-bit RGB image is compatible with only some filters. A CMYK image is compatible with even fewer filters.
JJ
John Joslin
Jul 29, 2006
Investigations have shown that, in most cases, putting an 8 bit image into 16 bit mode for processing has few, if any, perceptible advantages.

And you have the limitations mentioned above.
CN
Cybernetic Nomad
Jul 29, 2006
Investigations have shown that, in most cases, putting an 8 bit image into 16 bit mode for processing has few, if any, perceptible advantages.

Agreed. The only advantage I have found was when I knew I had to make a really drastic correction to a file I did not scan.

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