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Re: filmscanners: Profiling negative films

In a message dated 4/25/2001 10:27:32 AM EST, michael@shaffer.net writes:

> > As long as the sensor is linear, there's nothing that can even
>  > theoretically be more accurate than a 3x3 matrix transform.  This
>  > is what VueScan uses.
>  > ...
>   Just to clarify ... does a simple "3x3 matrix" profile allow for the
>  capture of each R,G & B channel having a different "linearity"?

I don't know what "different linearity" means.  The 3x3 matrix
transform assumes that each CCD channel's value is linearly
related to the number of photons that hits it.

Ed Hamrick


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