 | | | Simulating Dark Adaptation | Simulating Dark Adaptation 2003-12-09 - By samworf@(protected)
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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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