System and method of anomaly detection
US8941484B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Jul 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B31/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method and apparatus wherein the method includes detecting a plurality of events within a security system, evaluating the events using one of a first expression defined by ΣrεQconf(f(r)−mrg(r)), a second expression defined by ∫rεR|f(r)−mrg(r)|dr and a third expression defined by ∫rεRconf(f(r)−mrg(r))dr, where r is a size of a neighborhood around a data point, f(r) is a Local Correlation Integral (LOCI) of r, mrg(r) is a margin of r, R is a predetermined set of intervals of neighborhood sizes, Q is a predetermined discrete set of neighborhood sizes and conf(d) is a non-linear confidence function being 0 for near distance to the data point and quickly approaching 1 for larger distances, comparing a value of the evaluated expression with a threshold value and setting an alarm upon detecting that the value exceeds the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.