Glen Berry wrote:

> There is also a function in both Photoshop and Gimp called "Auto
> Levels"

For what I read here,
http://www.geocities.com/SiliconValley/Haven/5179/
it's equivalent to PSP and Picture Publisher H/M/S modification, including
the color balancing alteration. So we're basically talking about the same
thing.
The really nice thing about H/M/S balancing, for a non specialist of photo
touch-up, is that it is very simple to use (unlike color balancing or even
color saturation) and, usually, a subtle extension of the shadow range is
quite enough to enhance nicely a picture. So if something of that sort could
be implemented in pov, it would be nice to have it done along the same
lines, or, if this can be done with a generic model, to ensure that this
model can be used in a macro that does it with the H/M/S logic. Obviously,
such a generic model could be extremely powerful and improve many pov
renders in a dramatic way.

In fact, I wonder why most pov pictures use such a narrow range. I have
always noticed that pics from other renderers tend to be crispier : is it
possible that these renderers include some self-correcting algorithm that
would stretch the range whenever it's needed ? Note that this is a general
statement : HE Day pics, for instance, always seem quite contrasted already.

Anyway, whatever solution Chris Huff (and al) find for this, many thanks in
advance !

G.

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