Graphics Programs Reference
In-Depth Information
tional tonal data available to the user compared to the same image
processed in the camera to a “fixed” color space like sRGB or Adobe RGB
(1998).
If you are so inclined to set your one-shot DSLR camera to produce
a fixed color space, you really don't need to be reading this chapter. The
“color management” is being handled for you as the camera renders its
color data. At least that's the idea of the camera manufacturers. You have
to live with the color and color accuracy this conversion provides or edit
the image.
Another issue is that all the digital cameras of this type do not actu-
ally embed ICC profiles into their rendered and encoded files. When
opening them in Photoshop, you'll likely get a missing profile dialog. The
next step would be to assign the profile that matches the setting made at
capture [sRGB or Adobe RGB (1998)]. Some cameras use a method to
describe the color space of the captured data using
EXIF
(Exchangeable
Image File Format), which is a form of metadata (data about data) that
is placed into the image itself by the camera. Figure 5-3 shows the Pho-
toshop
File Info
dialog, which allows users to see and place EXIF data into
documents. Some camera manufacturers place information about what
color space the user set on the camera so they do not have to actually
embed an ICC profile into each image captured. On paper, it's a great
Definition
EXIF:
Exchangeable
Image File Format. A
standard for storing
interchange information in
image files such as JPEG.
EXIF provides a wealth of
information embedded in
the image and specifics,
such data as color space,
resolution, ISO, shutter
speed, date and time, and
so on.
Fig. 5-3
Using
Photoshop's
File Info
dialog, EXIF data can be
seen here from an image
file shot on a Canon 300D.
