Re: Color Corrector

Brad,

The Colour Management and Colour Correction in CinePaint
years project of Stefan Klein is available as PDF for download:

http://www.behrmann.name/index.php?option=com_weblinks&task=view&catid=67&id=137
http://www.behrmann.name/index.php?option=com_weblinks&task=view&catid=67&id=138

He is the original implementor of the colour management and colour wheels 
in CinePaint. The documents contain some background and images.

regards
Kai-Uwe Behrmann
--
development for color management 
www.behrmann.name + www.oyranos.org + www.cinepaint.org


Am 14.12.06, 06:10 -0500 schrieb Bradley A. Hare:

> 
> 
> Kai-Uwe Behrmann wrote:
> > 
> > The Option button shows an list of colour spaces to select from. I have 
> > here HLS and Lab beside Bernstein and Gaussian transfer functions. A new 
> > new colour space would fit there in nicely.
> 
> Currently, the LAB option only refers to the lightness adjustment
> (interpolation for lightness is done in the lab space if checked).
> User interaction and interpolation for everything else goes through
> the HSL model.
> 
> The code is a little strange here, things are done in RGB, LAB,
> YUV and HSL in one short stretch of code. I'm still trying to
> work out an optimization.
> 
> It might be nice (later) to have additional options for user
> interaction in perceptually uniform spaces (full LAB support)
> 
> > other issues I remember:
> > o the options dialog dont close by closing the correction dialog
> I will look at this
> 
> > o missing 16-bit(/32-bit?) support
> 
> My original hack was for 16 bit support.  My current code is aiming at
> U8,U16 and 32 bit float.  I can do this quickly through some simple
> changes to the existing code, but I am not convinced that what
> is there is correct and optimal.
> 
> > o the effect profile output is slightly broken. Setting as effect profile 
> >   is not the same as applying the correction inside the tool.
> 
> 
> Again I'll have to look at these.
> 
> Regards,
> 
> Brad Hare
> 

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