Method and system for determining connection states of straight short vectors representing figure in curve fitting
US5231697A · kind A · utility
32Cited by
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8Claims
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Key dates
| Filing date | Apr 20, 1990 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Apr 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/17
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In curve fitting to straight short vectors, a corner point is detected by a determination of .vertline.Pi-Vi.vertline.>.delta. on the basis of a connecting point Pi, an interpolation point Vi and a reference value .delta.. After a comparison of the distance between vectors Pi-1Pi and PiPi+1 connected at the connecting point Pi, a determination of .vertline.Pi-Pi-1.vertline. cos (.theta.i/2)>.delta. or .vertline.Pi+1-Pi-1.vertline. cos(.theta.i/2)>.delta. is performed to detect a point at which a straight line connects a curve smoothly, a point at which a curve connects a straight line smoothly or a point on a curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.