Graphics Programs Reference
In-Depth Information
cameras do not have a gamut limitation but the targets do. That brings
us to the GretagMacbeth ColorChecker DC seen in Fig. 5-7.
Realizing that a target should be designed from the ground up for
building camera profiles, GretagMacbeth produced this target with many
more color patches including several patches made from a glossy mate-
rial. The idea was that this would expand the resulting gamut of a camera
profile since the gloss patches were far more saturated. The problem now
became shooting the target in such a way that no flare or reflections
ended up in any of those gloss patches. Having even a tiny amount of
reflections in even a single patch would ruin the resulting profile. In an
effort to solve this issue of glare, in early 2004, GretagMacbeth intro-
duced the ColorChecker SG (for semi-gloss), as seen in Fig. 5-8. The target
has improved color patches made of a semi-gloss material that is a very
good compromise between the original ColorChecker 24 and ColorChecker
DC . At this time, only a few products support this new target, but other
companies should begin to support it as it becomes common in the field.
Based on testing since its introduction, I can say that the ColorChecker
SG seems to be the best attempt at producing a digital camera target thus
far. Some users attempt to use the IT8/7.2 for building camera profiles
but this is usually not a good idea since the gamut and the dyes of this
Fig. 5-7 The GretagMacbeth target known as the ColorChecker DC .
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