PS 6 here... Two questions about curves:

How do I create Map settings (*.AMP) files by exactly specifying all
256 points using numbers instead of drawing with the pen tool?

What are Transfer functions (*.ATF files)?

Don.

phoney.email@yahoo.com (Don) wrote in message news:<40b4db35.2932503@news.individual.net>..
.
> PS 6 here... Two questions about curves:
>
> How do I create Map settings (*.AMP) files by exactly specifying all
> 256 points using numbers instead of drawing with the pen tool?
>
> What are Transfer functions (*.ATF files)?
>
> Don.

Don,

transfer functions are functions for CMYK toner, which
are inserted between the normal toner calculation output x
and the machine input y.

Standard is y=x, the default straight line in the diagram.
x and y represent each channel of C,M,Y,K or all together.

E.g. darkening the midtones is done by a banana upwards shape.

A very helpful tool for adjusting uncalibrated laser printers,
Unfortunately it works only on Photoshop level. Much better it
would work for all Windows applications.

Transfer functions can be defined in PPD files for PostScript
printers, but as far as I know it works only with PageMaker.
Photoshop and InDesign donīt show these new PPD features.

Best regards  --Gernot Hoffmann

On 27 May 2004 01:06:31 -0700, hoffmann@fho-emden.de (Gernot Hoffmann)
wrote:

>phoney.email@yahoo.com (Don) wrote in message news:<40b4db35.2932503@news.i
ndividual.net>... 
>
>Don,
>
>transfer functions are functions for CMYK toner, which
>are inserted between the normal toner calculation output x
>and the machine input y.
>
>Standard is y=x, the default straight line in the diagram.
>x and y represent each channel of C,M,Y,K or all together.
>
>E.g. darkening the midtones is done by a banana upwards shape.
>
>A very helpful tool for adjusting uncalibrated laser printers,
>Unfortunately it works only on Photoshop level. Much better it
>would work for all Windows applications.
>
>Transfer functions can be defined in PPD files for PostScript
>printers, but as far as I know it works only with PageMaker.
>Photoshop and InDesign donīt show these new PPD features.
>
>Best regards  --Gernot Hoffmann

Excellent explanation. Thanks very much, Gernot!

Don.