Subject change detection system and subject change detection method
US9373042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2011 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Sep 20, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2554/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention detects a change in a subject by detecting the subject from an image, acquiring a feature quantity distribution that indicates shape information of the detected subject, accumulating the shape information that is indicated by the acquired feature quantity distribution and comparing the shape information a predetermined period of time before with the current shape information by using the accumulated shape information. Here, the invention acquires the feature quantity distribution of the subject from a processing target area extracted from an image area that includes the subject. The invention detects a change in the subject by using accumulated shape change information acquired from the shape information. The invention detects a change in the subject by using averaged shape change information obtained by averaging the shape change information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.