RE: scanner quality when profiling?

[Mark Swinkels <MarkSw@Attachmate.com>]

One issue I haven't seen brought up in relation to scanner quality is the
light source used. Since all mixed color printing processes are metemaric to
some extent it would seem that the light source and the exact CCD filter
responses could have a considerable effect on the accuracy of profiles. For
example if the light source contained a large UV component then the
fluorescent whiteners in many bright white papers would be activated to a
greater extent than they would be under incandescent lights.

Even profiling packages that generate scanner profiles from known targets
would be affected since the exact dyes and spectral characteristics of the
target would be different from the prints being profiled so that a print and
a target that looked identical under D50 viewing conditions might appear
quite different to the scanner.

Do scanner manufacturers specify what viewing conditions the scanner
emulates?

-- Mark
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