re:Digital vs Analog - Part 1

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Fri, 13 Dec 1996 10:38:55 -0500
>From: P3D Gabriel Jacob writes:
>.........................
>
>Excellent points Larry. This is exactly was is being done by a group at the
>Ames Research Center. Here is an excerpt from there web page.

*************  Thanks for the pointer, Gabriel. I knew that the idea was too
good to not already be in use somewhere. I believe this direction will be
the most important direction as far as 3D imaging is concerned. When I saw
NASA's ad about their miniaturized satellites that use thousands of little
cameras spread out over miles of outer space and used to capture detailed
images of far away objects, I realized this is the strongest tecnical
direction for 3D period. Tomorrow's 3D camera will have many more than two
lenses and no film but any resolution you want.

>
>>>Beginning in late 1991, the Bayes group at Ames Research Center began a
>project to develop the theory and practice of multiple image data
>combination. Multiple images taken from similar locations and under similar
>lighting conditions contain similar - but not identical - information. 
>Slight differences in instrument orientation and position produce
>mismatches between the pixel grids of different images. These mismatches
>ensure that any point on the ground is sampled differently in each image.
>The surface modeling project is designed to exploit these differences to
>build a super resolved composite image that uses all the information from
>the separate images.<<
>
>They have some dramatic pictures showing examples of the improvement of the
>pics using the above technique on their web page. So thus as otherwise 
>reported here a long time ago regarding digital resolution, software or
>computer processing power does help in increasing apparent resolution of
>CCD's. I find it amusing that everybody remarks how poor digital is 
>compared to film yet ignore that fact alot of fields are going precisely
>that route. In astronomy CCD's are being used to greater extent than film.
>I think it might have even supplanted it. Not sure of the exact reasons
>thou and am pretty sure the astronomers on this group can explain the
>advantages and why.

***********  Yes, CCD imaging dominates astronomy today. Pick up any
astronomy magazine off the shelf and read all about it.

>
>Anyways here is the link to above page.
>http://fi-www.arc.nasa.gov/ic/projects/bayes-group/group/super-res/
>
>Gabriel

*************  Thanks again, I'm going to check that link to see their examples.

Larry Berlin

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


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