Xerox CX User Manual - page 120
Parameter
Option
Description
CMYK rendering
intent
Rendering intent enables you to compress out-of-gamut
colors into the color capability of the press you are using.
The desired rendering intent should be selected to
preserve the important aspects of the elements and
applied to RGB and CMYK elements.
All printers, monitors and scanners have a gamut or range
of colors that they can output (or view in the case of a
scanner). If a color needs to be output and is outside the
gamut of the output device, it must be mapped or
approximated to some other color, which exists within the
gamut. Rendering Intent enables you to compress out-of-
gamut colors into the color capability of the press you are
using. You can set any rendering intent value for RGB
elements by selecting the required from the Rendering
intent options list. The default value for RGB is Perceptual
(photographic). The default value for CMYK is Relative
Colorimetric.
There are several methods that can be used when
translating colors from one color space to another. These
methods are called Rendering Intents because they are
optimized for various uses. When working with ICC
profiles, it is important that you select the Rendering Intent
that best preserves the important aspects of the image.
Each rendering method specifies a CRD for color
conversions. You can modify the rendering method to
control the appearance of images, such as prints from
Microsoft Office software or RGB photographs from
Photoshop software.
The following options are available:
●
Auto: Automatically applies different rendering intents
to each object type (images, text, and graphics). Use
this option when your file includes different objects on
the same page—for example, a presentation that
includes jpg pictures, text, and Microsoft Excel graphs.
If RGB images and CMYK graphic elements are
included on the same page, the RGB images will use
perceptual rendering intent, while the CMYK graphic
elements will use relative rendering intent.
Note: Preserve pure CMY colors is not affected by
this rendering intent option.
●
Relative colorimetric: Some closely related colors in
the input color space can be mapped to the closest
possible color in the output color space. This reduces
the number of colors in the image.
●
Absolute colorimetric: Select this method for
representing “signature colors“. Colors that are highly
identified with a commercial product. Colors that fall
inside the output color space are matched very
accurately.
●
Saturation: Select this method for artwork and graphs
in presentations. In many cases, this option can be
112
Chapter 10—Job parameters