Simulating Dark Adaptation 2003-12-09 - By Hoehne, Brad
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I thought of this idea, but the dynamic range I'm after is much too great
for this. There would only be a few greyscale levels to work with. Thanks
anyway.
Brad H.
> -- ---- --
> From: samworf@(protected)
> Reply To: maya@(protected)
> Sent: Tuesday, December 9, 2003 4:09 AM
> To: maya@(protected)
> Subject: Re: Simulating Dark Adaptation
>
> At Mon, 8 Dec 2003 16:23:05 -0500 , you wrote
> > Does anyone know of a way to simulate the dark adaptation of the
> >human eye? I have a scene in which the glow of a very bright light is
> >masked out by an object and then the brightness level of the entire scene
> >goes up due to the dark adaptation of the character's eyes revaling
> objects
> >formerly too faint to see. I am now doing this by keying a slow increase
> of
> >all the lights in the scene, but this is unsatisfactory for some
> purposes.
> >Is there any way to change the "sensitvity" of a camera in much the same
> way
> >that one would open up the f/stop on a camera to gather more light?
> Perhaps
> >one could use some mel script to multiply the output individual pixels by
> >some keyed number? I have no idea how to do this...
> > Any ideas?
>
> If I understand you correctly, you are trying to simulate the haze and
> reduced
> dynamic range of a human eye which has been suddenly deprived of light.
> Why
> not do this in post, with Adjust Levels/Curves in (your favorite post
> program)? Bring the black level way up to wipe out dark details, then add
> another Levels to bring the black level back down so your image doesn't
> look
> too bright gray. And add some chromatic noise to simulate phosphenes
> (sparks
> you see with your eyes closed).
>
>
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