Method of counting particles using degree of membership in clustering data points into subgroups
US5555196A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1992 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Jun 18, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of seeking the number of particles of each kind in a group of particles in which plural kinds of particles are intermixed, by measuring, for example, two kinds of properties of each particle by a suitable method or device, plotting each particle on a rectangular coordinate system using the measured properties as its X and Y co-ordinates to obtain a distribution diagram, drafting boundaries to partition the distribution into clusters of the respective kinds and counting the number of particles within the boundary of each cluster, which, especially, even when the clusters of the respective particles are mutually overlapping, can reduce any deviation of the count of particles from its true value as small as possible by defining an optimum boundary. In this method, a center of gravity of each cluster is determined, a degree of attribution of each particle to each cluster is calculated based upon a distance of each particle from the center of gravity and the number of particles belonging to each cluster is counted in consideration of the degree of attribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.