[Lcms-user] qtscannerprofiler problems

[<nav...@gm...>]

hi all,

downloaded lprf109w32 plus the patched qtscannerprofiler1.exe and tried
profiling my nikon ls-2000 
filmscanner and a fuji digitalcamera. i have a basic understanding of a
profiling workflow and followed the 
tutorial, but my problem is that only a very good (ie. no color cast, good
dynamic range) input image of 
the target leads to an acceptable icc profile in the end, which is sort of
pointless. 
in more verbose terms: if i load an image of my wolf faust reflective target
into qtmeasurementtool, pick 
rgb values, fire up qtscannerprofiler, load the apropriate reference file,
generate the icc profile (various 
parameter settings tried) and proof the image again in qtmeasurementtool i
get quirks ranging from jumps 
in gradients to black spots to completely black images, depending on the
quality of the input file (also big 
differences in dE).
i understand that a better input image should lead to better interpolation
between color patches, but 
shouldn't the test target patches be proof displayed correctly even on
suboptimal input images? after all, 
it's the patches that define the rgb->l*a*b conversion.

any help/general enlightenment would be appreciated.
thanks,
chris

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