US5379236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moving object tracking method
Assignee: Yozan Inc
•
Filing: 1992-05-20
•
Granted: 1995-01-03
•
Expires: 2012-05-20
Abstract
Abstract A moving object tracking method for determining whether a moving object has come to a standstill and whether the moving object is moving irregularly without defining a background image. Images of a predetermined area are input sequentially. As the images are input, an object moving within the predetermined area is extracted based on the differences between the images. A representative point of each such moving object is calculated for each new image, and the expected range of movement of the representative point is determined. The moving object is found to be moving regularly when the representative point remains within the expected range.
Inventors
- 👤 Makoto Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:20
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/20; G06T7/246
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
A method for determining whether a moving object is accelerating or decelerating comprising the steps of: i) sequentially inputting images of a predetermined area, ii) extracting a moving object from said images based on the differences in said images, iii) for each said image, calculating a representative point of each moving object and the expected range of the representative point for that object in a subsequent image, iv) for each said moving object, determining that said moving object is accelerating or decelerating when the location of the representative point for the object is outside of the expected range in said subsequent image.
Claim 2
Independent Claim
102 words
A method for determining whether a moving object is accelerating or decelerating comprising the steps of: i) sequentially inputting images of a predetermined area, ii) extracting a moving object from said images based on the differences in said images, iii) for each said image, calculating a representative point of each moving object and the expected range of the representative point for that object in a subsequent image, iv) for each said moving object, determining that said moving object is accelerating or decelerating when the location of the representative point for the object is outside of the expected range in said subsequent image.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein the representative point is a center of gravity of that object.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the representative point is a center of Feret's diameters of that object.
Claim 5
Dependent Claim
23 words
The method of claim 1, wherein an object that is found outside of said expected range does not generate any new representative point.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-02 | 1998-07-04 | 1999-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-02 | 2002-07-04 | 2003-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-02 | 2006-07-04 | 2007-01-03 | $7700.00 | Window Closed / Lapsed |