Subject: Re: + Camera Raw Feature Requests +
Let me slip in one more comment about negative inversion. The best tool I have encountered for this purpose is the Photoshop plug-in NegPos, written by David Dunthorn. You can find the plug-in, and a description of the underlying math, at
Basically, the need for the plug-in comes from the fact that for negative inversion you need to perform an operation of the form "out = 1/in", whereas the Photoshop 'invert' command does "out = 1 - in". (in & out are normalized to 0..1). Quite a difference indeed, also in the results.
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