Automated concrete/asphalt detection based on sensor time delay
US11386649B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2019 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Jun 23, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Technology is provided for identifying concrete and/or asphalt (or other materials) in a multispectral satellite image that has multiple bands including a first set of bands from a first sensor and a second set of bands from a second sensor. The second sensor is at a different position on a focal plane as compared to the first sensor so that a single location depicted in the multispectral image will have been sensed at different times by the first sensor and the second sensor. The system identifies moving vehicles in the multispectral image and subsequently identifies sample pixels in the multispectral image that are near the moving vehicles. These pixels are high confidence samples of roads made of concrete and/or asphalt. Additional pixels are identified in the multispectral image having spectral characteristics that are within a threshold of spectral characteristics of the sample pixels. These additional pixels also depict concrete and/or asphalt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.