[argyllcms] Re: Determining proper error value for -r

Ben Goren wrote:

However, it also  occurred to me: Argyll already  has the facility
to deal with  multiple readings of paper  white. Is this something
specific to paper white, or is it generic? That is, would there be
anything  to be  gained by  creating a  ti1 file  the normal  way,
reading  it multiple  times, merging  all those  multiple readings
into  a single  appropriately-munged  ti3 file,  and creating  the
profile from that?


The interpolation algorithm inherently copes with test values that
are close to, or on top of each other. They aren't averaged in the
sense that the weighting those points get isn't reduced because
they are closer together, they each count as a weight of 1.0,
but if they are on top of each other any differences will
be averaged amongst themselves.

Repeating values is a crude way of applying a higher weighting
to that point. If every point was duplicated, then effectively they
would be averaged (although your smoothing factor will have
been diluted by a factor of 2, but your noise level will have
been reduced.)

Graeme Gill.

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