Crosswalk detection device, method and program
US11222216B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Jun 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/176
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A crosswalk detection device according to an embodiment includes a processor, and the processor configured to perform image scanning processing for scanning aerial image data in unit of window, multiple line segment creation processing for creating a plurality of line segments corresponding to a distance based on a dimension of a crosswalk in any direction within a region scanned in the aerial image data, first calculation processing for calculating an absolute value of a first derivative value indicating a difference in brightness between both ends of the line segment and calculating an average value of the absolute value of the first derivative value for each angle, second calculation processing for calculating an absolute value of a second derivative value indicating a difference between a difference in brightness between a first end and an intermediate point of the line segment and a difference in brightness between the intermediate point and a second end of the line segment and calculating an average value of the absolute value of the second derivative value for each angle, and crosswalk determination processing for determining that coordinates of each of the line segments are…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.