[Shotwell] Red-Eyes

[Charles]

thank you for your explanations,

yes, it makes sense, I can see that there are nuances in the grey of the 
corrected eye, which was very bright when red, but the result looks like 
dead eye, specially with large pupils, i join a photo of my dog, with a 
red eye and a corrected eye, and the original with 2 red eyes.

Possibility of making the eye darker would arrange this feeling of dead eye

Le 17/06/2010 21:15, Lucas Beeler a écrit :
> Hi Charles,
>
> First, thank you very much for your interest in Shotwell! I appreciate
> your comments and suggestions about the functionality of the red-eye
> tool. To address your points:
>
>    
>> the best solution would be possibilty of choice of the new nuance (from
>> white to black) of the pupil
>>      
> We could consider this for an upcoming release of Shotwell. Indeed,
> I've ticketed it here: http://trac.yorba.org/ticket/2148 .
>
>    
>> the red pupil is replaced by light-grey pupil, which looks like dead eye ...
>> in fact pupils are black, isn't it?
>>      
> Yes, pupils are black, but the viewer rarely perceives them as black.
> This is because the surface of the human eye is moist and highly
> reflective. As a result, pupils are shiny and reflect light very well.
> So most of the time, they appear to be a gunmetal or lead gray color.
> What's more, because they are so shiny, pupils have a reflectance
> distribution across their surface. So some areas of the pupil will be
> silvery-white because of the light they reflect while others will
> appear jet-black.
>
> When we designed the red-eye feature in Shotwell, it was very
> important to us to try to maintain this natural distribution of
> reflected light. So we don't just fill the pixels with black or gray
> like some other programs. Instead, we attempt to extract luminance
> information from the green and blue channels and transfer it evenly
> into the red channel, thus preserving the natural highlights of the
> pupil. This is why your pupil appears light gray. It's not an artifact
> of Shotwell. It's the way the pupil was naturally lit. Does that make
> sense?
>
> Take care,
> Lucas
>
> --------------------------------
> Lucas Beeler
> Software Designer
> Yorba Foundation
>