Occupancy detection for managed lane enforcement based on localization and classification of windshield images
US8824742B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2012 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Jan 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/59
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for detecting a vehicle occupancy violation includes an image capture module that acquires an image including a vehicle cabin from a camera positioned to view oncoming traffic. The system includes a violation determination device, which includes a feature extraction module that processes the image pixels for determining an image descriptor. The process is selected from a group consisting of a Successive Mean Quantization Transform; a Scale-Invariant Feature Transform; a Histogram of Gradients; a Bag-of-Visual-Words Representation; a Fisher Vector Representation; and, a combination of the above. The system further includes a classifier that determines a distance that the vehicle image descriptor/representation is positioned in the projected feature space relative to a hyper-plane. The classifier determines whether the distance meets a threshold and classifies the image when the threshold is met. A processor implements the modules. A graphic user interface outputs the classification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.