P3D Re: Circle of Confusion

[Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Wed, 28 Jan 1998
>From: Greg Wageman writes:
>
>>From: Larry Berlin <lberlin@xxxxxxxxx>
>>*****  I mean simultaneous, so that the subject can be in motion. Multiple
>>as in several images. The point is that you don't want them to be taken from
>>the same point................
>
>
>Right, got it now.  I was thinking originally of an anti-aliasing technique
>that's used in raytracing, where you basically trace rays to each *corner* of a
>pixel, then average the results.
>
>The technique you mention would use a much more sophisticated algorithm to
>combine the date from multiple perspectives into a single image (or
stereopair).
>I seem to recall that this is a technique that NASA has used, or am I
>misremembering?
>

That's right. NASA is using it to dramatically improve the resolution of
images from space probes. There is some mathematically oriented interest
group who particularly enjoy researching and developing these specialized
algorithms. NASA  is one of the users of their work. Other applications are
being researched and developed.  When you know your images are of the same
object/scene, the differences between several exposures of the same scene
provide a means to calculate a much higher resolution than any one image
contains. Some of their detailed asteroid pictures are derived from 20 or
more shots, each with very little visible detail.

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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