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USING PHOTOSHOP LIGHTROOM 4
Workspace and setup
Last updated 11/26/2012
Display a copyright watermark in web photo galleries” on page 183
Color management
More Help topics
Specify options in the Print Job panel” on page 174
About color management in Lightroom
Lightroom simplifies color management in your photographic workflow. You don’t need to choose color settings or
color profiles until you are ready to output your photos. To take advantage of Lightroom color management, you need
to calibrate your computer monitor so that you are viewing accurate color. See
Calibrate and profile your monitor
on page 25.
Color spaces, color profiles, and tonal response curves
It’s not necessary for you to understand how Lightroom manages color internally, but the following information may
be useful in your workflow.
A color space describes a range or gamut of colors. Various devices in your photographic workflow have different color
gamuts in which they can record, store, edit, and output photos. A color profile defines a color space so that Lightroom
knows how to manage and convert colors in your photo.
The Library module stores all previews in the AdobeRGB color space. These previews are also used when printing in
draft mode. Unless you choose differently in the Soft Proofing panel, the Develop module displays photos in the
ProPhotoRGB color space.
A color profile is also defined by a gamma value, or more accurately, its tonal response curve. The tonal response curve
defines how tonal values in the raw image are mapped. To provide useful information in the histogram and RGB value
display, Lightroom assumes a gamma value of approximately 2.2. More accurately, it uses a tonal response curve
similar to the tonal response curve of the sRGB color space.
While Lightroom uses a tonal response curve to provide information for the histogram and RGB values, it manipulates
the raw data before it is tone mapped. Working in this linear gamma avoids many of the artifacts that can result in
working with a tone-mapped image.
Output color profiles
When you print a photo in Lightroom, you can choose to convert the colors to more closely match the color space of
the printer, paper, and ink you are using. For information on working with printer color profiles, see
Set print color
management” on page 175.
Lightroom automatically exports images in the Slideshow and Web modules using the sRGB profile so that the color
looks good on the majority of computer monitors.
Calibrate and profile your monitor
You can calibrate your monitor and create a profile that specifies its color characteristics using monitor profiling
software and hardware.
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