Re: [Gimp-user] Equations/Details of the Color Transformations

[Øyvind Kolås <pippin gimp org>]

For most of these filters you find the code and innerloop; which ends
up containing the most important bits of the formula in the sources
for the GEGL operations, like  gegl/operations/common/exposure.c and
also in the folder gegl/operations/common-gpl3+ . However beware that
the innerloop does not tell the whole story; as operations also
constrain the type of pixel encodings they accept. For instance
gegl:exposure ensures that the component values are linear, the math
would be wrong if applied to 8bit sRGB data or floating point sRGB
data.

/pippin

On Thu, Apr 16, 2020 at 9:34 PM Simone80 <forums gimpusers com> wrote:
> Hi All,
>
> I am interested in the color transformations of the tools like
> brightness-contrast, hue-chroma, hue-saturation, saturation, exposure, color
> balance, color temperature, ...
>
> Do you know where I can find the details of these tools, in particular the
> mathematical equations behind them?
>
> Thank you in advance for your help.
>
> Simone
>
> --
> Simone80 (via www.gimpusers.com/forums)
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