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High-speed on-chip windowed centroiding using photodiode-based CMOS imager

  • US 6,519,371 B1
  • Filed: 10/02/2000
  • Issued: 02/11/2003
  • Est. Priority Date: 09/30/1999
  • Status: Expired due to Term
First Claim
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1. A centroid computation system, comprising:

  • an imager array having columns and rows of pixels;

    a switching network adapted to receive pixel signals from said image array;

    a plurality of computation elements coupled to said switching network to receive pixel signals and operating to compute inner products for at least x and y centroids, said plurality of computation elements having only passive elements without an amplifier to provide inner products of pixel signals from said switching network; and

    a divider circuit coupled to said computation elements and adapted to receive said inner products and compute said at least x and y centroids.

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