This is intended to extend the
range of tones and colors to more closely match the range of
tones in the real world, which means less interpolation.
This has resulted in more accurate color profiles. Another
feature of the SG target is the series of black, gray, and
white patches around the perimeter. There are used to check
the evenness of light and useful for determining exposure.
With one light, it is more difficult to evenly illuminate the target. Differences in color temperature with two lights can also cause problems with the capture. With that in mind, it is easier to evenly illuminate the target with two lights if you know your lights are carefully matched for color temperature. When using either one or two lights, it is important that the lights are placed far enough to the side of the target to eliminate any glare which is more problematic with the SG target.
With the target evenly illuminated, the next step is to set up the camera so that it is relatively square to the target, since later we can fine-tune the cropping. Other considerations include, but are not limited to properly adjusting the exposure and setting the white balance. You know your camera, your lighting, and your expectations. Follow a consistent approach when setting up the capture.
The quality of the digital
capture, and the resulting profile is directly related to
the following three items
As a quick review, lets
outline what the software for creating digital camera
profiles is actually doing. The software is used to compare
the capture to the data file of the target. The capture is
the way the camera sees color. The data file describes the
target content. The profiling software compares the capture
to the data file, defines where the differences are, and
creates a profile, optimizing color and tone, much like a
set of eyeglasses do for us.
Digital Attributes is a group of consultants providing national and international coverage for color management consulting, assessment, installation and seminars.