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My question is in regards to this patent. They are claiming that their method of exclusive or'ing a set of vectors to estimate camera network topology. Is it fundamentally valid to patent such a method for anything?

As I can see, all this patent claims is that: If one cameras field of view (window), is occupied, and simulatenously another cameras field of view isn't, then they are not connected.

I think this is just logic which can be applied to anything. What do you guys think?

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The document you reference is a patent application, not a granted patent. I see the same inventors do have an issued patent US8396250 based on the same disclosure. The application you have referenced is a follow-on application that seems to attempting to get greater coverage then they got in US8396359. That issued patent has a much longer and narrower claim 1 that puts more specificity into what they and the examiner thought was new and not obvious.

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