On Feb 5, 1:06 pm, IsaacKuo <mech...@[EMAIL PROTECTED]
> wrote:
> On Feb 5, 12:04 am, Logan Kearsley <chronosur...@[EMAIL PROTECTED]
> wrote:
>
> > Thinking on it some more, though, I'm not entirely sure how one would
> > deal with the superposition of multiple light sources muddying the
> > pattern.
>
> I don't think it's possble. It's similar to the problem of de-blurring
a
> photo which has suffered a blur operation. In the case of gaussian
> blurring, the information is provably lost forever. With this more
> complex "rainbow" blurring, more information might be retained,
> but I'm skeptical about recovering it.
I'm pretty sure I've got it figured out. Each light source or shadow
source will produce a set of arcs of pure colors (or lack of colors
for shadow sources). When you superimpose multiple light sources and
look at it with a human eye, we perceive composite colors that jumble
up the information- but the iridescence eye doesn't have to do that.
It can have, say, a red arc intersecting a blue arc and process those
separately rather than looking at it as a purple blob.
Our retina's have built-in neural circuitry for picking up straight
lines at various angles- the iridescence eye retina just needs
circuitry for recognizing radius and direction of curvature of
monochromatic arcs.
An arc of any particular color can tell you the conical angle via
color, direction by concavity, and range by radius of curvature, for
objects at a particular angle. Adding lots of different types of color
sensors that gather arc information independently from other types
allows you to look for things over a range of angles. Then later
integrating arc information from each different sensor set allows you
to refine direction and range estimates by examining the ordering of
colors in concentric arcs and the spacing between the arcs.
The only problem I can think of is color jamming- very brightly
colored objects would eliminate some of the arcs, but I think that can
be worked around as long as you have sufficiently fine frequency
resolution. Possibly more problematic would be other iridescent
objects, which might seem to jump back and forth as their apparent
colors change.
-l.
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