Sorry for the missing part of the message.

So to "remove" the red eyes, you have to take account only of the pupil
which is black most of the times and not the iris which has its own colour
and is not affected by the phenomenon.
So you can desaturate the pupil without taking care of the iris colour: you
don't mask the iris.

The only trick is with close-ups where there are reflections of the
surroundings. You want to keep them.

J-L

2018-06-03 12:06 GMT+02:00 Jean-Luc Coulon (f5ibh) <
[email protected]>:

>
>
> 2018-06-02 23:28 GMT+02:00 Jean-Luc CECCOLI <[email protected]>:
>
>> [ ...]
>
>
>
>> For eyes with dark iris, I currently reduce the red in a drawn mask from
>> the channel mixer and substract.
>>
>> For eyes with clear iris, this give awful results and I found the
>> monochrom module could give not so bad results.
>>
> It is not a problem with the iris but with the pupil.
> The iris is the coloured part of the eye and it is (pretty) not affected
> by the red eyes problem.
> The red eye is a reflection of the light passing through the pupil and
> reaching the retina. The retina has many capillary vessels and what is red
> is the blood in these capilaries under a strong direct light.
>
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