Moving body detection method and apparatus and moving body counting apparatus
US6307951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1997 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Sep 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/262
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A moving body detection method and apparatus which detects moving bodies by processing image data for said moving bodies, including a process in which spatial phases, which are obtained by the operational formula tan.sup.-1 (AS/AC) or cot.sup.-1 (AC/AS) (where AC is a Fourier cosine transformation and AS is a Fourier sine transformation) in a case where image signals obtained as aggregates of picture elements on the basis of picture element data constituting the image data are subjected to a spatial Fourier transformation in a direction which is not perpendicular to a direction of movement of the moving bodies, are calculated in terms of a time series; and then the moving bodies are detected on the basis of changes occurring in the calculated spatial phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.