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Which microprocessor?

I'm looking for a microprocessor - originally I had decided on the A37x, but I'm thinking that may be overkill. Here are my requirements, if anyone can suggest a microprocessor that suits my needs, I would greatly appreciate it.

  • small (I think all qualify)
  • robust (specifically cold-heat differential)
  • ability to process images taken by a b/w camera under low-light conditions - need to differentiate individual points of "light"
  • ability to search quickly (speed is key) through a stored database of points (possibly in binary format?) to match up to distinguished points from above
  • ability to rapidly perform calculations in three-dimensional space

I think that will do it. I don't need the ability to process or display video (I know some can do that), but if it's built in, I can always just not use it.

If you have any questions, feel free to post them so you can get a better idea of what I'm looking for.

Thanks.