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Adobe ACROBAT DC - 2015 Manual

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Color management
Last updated 4/7/2015
About missing and mismatched color profiles
Unless specified otherwise, the document uses the working space profile associated with its color mode for creating and
editing colors. However, some existing documents may not use the working space profile that you have specified, and
some existing documents may not be color-managed. It is common to encounter the following exceptions to your
color-managed workflow:
• You might open a document or import color data (for example, by copying and pasting or dragging and dropping)
from a document that is not tagged with a profile. This is often the case when you open a document created in an
application that either does not support color management or has color management turned off.
• You might open a document or import color data from a document that is tagged with a profile different from the
current working space. This may be the case when you open a document that was created using different color
management settings, or scanned and tagged with a scanner profile.
In either case, the application uses a color management policy to decide how to handle the color data in the document.
Color conversion options
Color conversion options let you control how the application handles the colors in a document as it moves from one
color space to another. Changing these options is recommended only if you are knowledgeable about color
management and very confident about the changes you make. To display conversion options, select the Color
Management category of the Preferences dialog box.
Engine Specifies the Color Management Module (CMM) used to map the gamut of one color space to the gamut of
another. For most users, the default Adobe (ACE) engine fulfills all conversion needs.
To view a description of an engine or intent option, select the option. The description appears at the bottom of the dialog
box.
Use Black Point Compensation Ensures that the shadow detail in the image is preserved by simulating the full dynamic
range of the output device. Select this option if you plan to use black point compensation when printing (which is
recommended in most situations).
About rendering intents
A rendering intent determines how a color management system handles color conversion from one color space to
another. Different rendering intents use different rules to determine how the source colors are adjusted; for example,
colors that fall inside the destination gamut may remain unchanged, or they may be adjusted to preserve the original
range of visual relationships when translated to a smaller destination gamut. The result of choosing a rendering intent
depends on the graphical content of documents and on the profiles used to specify color spaces. Some profiles produce
identical results for different rendering intents.
In general, it is best to use the default rendering intent for the selected color setting, which has been tested by Adobe
Systems to meet industry standards. For example, if you choose a color setting for North America or Europe, the default
rendering intent is Relative Colorimetric.. If you choose a color setting for Japan, the default rendering intent is Perceptual.
You can select a rendering intent when you set color conversion options for the color management system, soft-proof
colors, and print artwork:
Perceptual Aims to preserve the visual relationship between colors so it’s perceived as natural to the human eye, even
though the color values themselves may change. This intent is suitable for photographic images with lots of out-of-
gamut colors. This is the standard rendering intent for the Japanese printing industry.
… 536


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