Image detection method, image detection apparatus, image processing method, image processing apparatus, and medium
US6307963A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Jun 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
To provide an image detection method for judging whether a specific image is present in an input image by temporarily holding the input image signal, obtaining data from the held data like a circle having a radius r, calculating the characteristic value of the circular data, judging whether the characteristic value is included in a specific pattern in accordance with the similarity between the characteristic value and a reference characteristic value, obtaining data like a circle having a radius r' different from the radius r when judging that the characteristic value is included in the specific pattern, calculating a new characteristic value, and repeating the operation of judging whether the new characteristic value is included in a specific pattern over circular data having a plurality of radiuses. Thereby, it is possible to efficiently detect the presence or absence of a specific image whose arrangement conditions such as the angle and position in an input image are unknown.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.