Soft-decision classifier

Details Soft-decision classifier Soft-decision classifier

1992-12-09

1994-11-01

Downs, Robert W.

Image analysis

Histogram processing

For setting a threshold

340937, 364516, 395 61, 382 38, G06F 1536

Patent

active

053613791

ABSTRACT:
An apparatus and method are disclosed for classifying a signal among a plurality of potential signal sources or events in which a signal embodying values for predefined source features is received and conditional likelihoods are determined for the correspondence of each feature value with each of the plurality of events. The individual conditional likelihood values for each feature which corresponds to a common event are multiplied together to form an overall conditional likelihood that any event in question is the source of the signal. The total likelihood products are then sorted into maximum and minimum values, with the maximum likelihood forming a tentative output designation. The ranked values are then examined by a decision logic element to determine if they satisfy certain minimum absolute and relative value threshold limits to verify if the maximum or next higher level likelihood values designate proper output choices. Depending on the results of the threshold tests, one, two, or no signal sources or events are chosen for a signal classification output. At the same time, a conditional probability for the chosen signal is used to indicate a confidence level in the selected choice.

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