Process and device for generating graphical real-time directional information for detected object traces
US5812248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Mar 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process and apparatus are disclosed for generating object traces representing the movement of objects through a measuring space. The measuring space can be illuminated by a laser or other light source, or alternatively the objects can be self-illuminating. In either event, light from the objects is detected over a finite acquisition time, to generate the object traces. During a predetermined portion of the acquisition time, preferably near the end, one of several parameters that govern the object trace width is altered to increase the width, thereby giving the object trace the form of an arrow or vector. The altered parameter can be the brightness of illumination, the sensitivity of the image detector, or the position or state of system components, in particular the image detector, a lens or other active optical component between the objects and the detector, or an optical component between the light source and the objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.