HARDWARE GENERATION OF IMAGE DESCRIPTORS
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United States of America Patent
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Issued Date -
Jul 19, 2012
app pub date -
Jan 11, 2012
filing date -
Jan 14, 2011
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Abandoned
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Abstract
Interest point and description circuitry is provided for tracking an object through multiple image frames. Interest point and description circuitry may be provided on an integrated circuit in an imaging device. Interest points and descriptors may be calculated at frame rate. A feature detection function may be applied to scaled images to extract interest points. Descriptors may be rotating circular gradient-histogram descriptors. Descriptors may have one or two rings, each having equal area. Descriptors may have discrete rotational positions and discrete scaling. Gradient-histograms may be calculated for the descriptors using angular, radial, and directional weighting components.
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