Re: [CinePaint] Really basic script for batch converting. 8bit .png to 32bit Float .hdr

On Sun, 22 Nov 2009, diffid wrote:
>
> Also it looks like Cinepaint fills in the gaps in the tonal range
> spreading 8bit levels into a 32bit format, I may be wrong, if I am is
> there anyway Cinepaint can do that, a sort of interpolation. I don't
> know the correct terminology for that, otherwise I could google it.

Any such 'interpolation' would surely be a bug unless the user said to 
apply a filter.  However, converting integer-based formats into 
float-based formats results in some apparent 'interpolation' (change 
in value) since float is a lossy format.

> Noticed on photography forums that some are adding a very small amount
> of noise to shift some of the pixels about into the gaps to help where
> interpolation can't be done.

This is useful if the original image has more useful bits than the 
target format.  If applied after the fact, it only causes harm.  As 
the song goes "The first cut is the deepest".

Bob
--
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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