Method for identifying a signal containing symmetry in the prese

Details Method for identifying a signal containing symmetry in the prese Method for identifying a signal containing symmetry in the prese

1993-03-26

1994-10-25

Mancuso, Joseph

Image analysis

Histogram processing

For setting a threshold

382 42, 348 86, G06K 900, G06K 964

Patent

active

053596706

ABSTRACT:
The disclosure provides a method for use in a robotic system for identifying fasteners used in aircraft and other applications. The fasteners include rivets (with no slots), bolts (with two slots) and screws with one or two slots. The method accepts as input a family of related signals which are known to contain symmetry. By computing the mean variance of the zero-meaned cross-correlation signals, the method automatically selects those signals which contain pertinent information while disregarding those signals which do not. The accepted signals are then used to create a composite reference signal which can be used to determine the particular fastener type.

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Technical Paper entitled "Location and Identification of Rivets by Machine Vision", by Ernest Franke et al., Society of Manufacturing Engineers, Dearborn, Mich. 48121, 1985.

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