Specifications

For more information on color gamuts and color spaces, see the online Adobe Acrobat Guide.
Device-dependent color
Device-dependent colors relate to the settings of the device on which the image was created or
output. Device-dependent colors require all devices in the workflow to be “calibrated” to obtain
consistent color reproduction. In other words, the input devices (e.g. scanners or digital cameras),
monitors and output devices (e.g. digital color printers) have to be tuned to each other to make
the colors match.
Differences may even occur between devices of the same type or model, because they may have
different settings. Monitors may have different brightness or contrast, for example. For more
information on device-dependent color, see the online Adobe Acrobat Guide.
Device-independent color
To eliminate or at least minimize, color differences between devices, you can use a color
management system. Color management systems use a standard, device-independent color model,
such as CIELab. Images are associated with a profile, which contain information about the input
and/or output devices. Thus, if images are to be output on a specific device, it will be associated,
or “tagged”, with a profile for that device. Of course, the same goes for text or line-art. For more
information on device-independent color, see the online Adobe Acrobat Guide.
11.4 Rendering Intents
A color management system allows you to remap colors so that they best match the intended use.
‘Remapping’ means that colors from one output device’s color space are mapped to the color
space of another device. This remapping is done according to a specific remapping method, also
known as rendering intent. There are four remapping methods or rendering intents:
• Perceptual remapping
• Saturation remapping
• Relative colorimetric remapping
• Absolute colorimetric remapping
Perceptual remapping
The human eye is sensitive to the relationships between colors. Perceptual mapping alters all the
colors in the original color space to bring them into the gamut of the destination color space, but
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