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- W2108516918 abstract "We study a problem related to computer vision: How can a field of sensors compute higher-level properties of observed objects deterministically in sublinear time, without accessing a central authority? This issue is not only important for real-time processing of images, but lies at the very heart of understanding how a brain may be able to function. In particular, we consider a quadratic field of n smart pixels on a video chip that observe a B/W image. Each pixel can exchange low-level information with its immediate neighbors. We show that it is possible to compute the centers of gravity along with a principal component analysis of all connected components of the black grid graph in time O(sqrt(n)), by developing appropriate distributed protocols that are modeled after sweepline methods. Our method is not only interesting from a philosophical and theoretical point of view, it is also useful for actual applications for controling a robot arm that has to seize objects on a moving belt. We describe details of an implementation on an FPGA; the code has also been turned into a hardware design for an application-specific integrated circuit (ASIC)." @default.
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- W2108516918 date "2009-06-08" @default.
- W2108516918 modified "2023-10-14" @default.
- W2108516918 title "Distributed vision with smart pixels" @default.
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- W2108516918 doi "https://doi.org/10.1145/1542362.1542410" @default.
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