Method, apparatus, medium and device for extracting river drying-up region and frequency
US12211267B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 26, 2022 |
| Grant date | Jan 28, 2025 |
| Priority date | — |
| Expiry date | Apr 8, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/194
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a method, apparatus, medium and device for extracting a river drying-up region and frequency, and belongs to the technical field of remote sensing. The method for extracting a river drying-up region and frequency can be applied to efficiently acquiring river drying-up information for a long time within the large spatial region. With the inverse normalized difference water index (iNDWI) and the maximum value composite (MVC) method for the remote sensing images, the present disclosure omits the troublesome step of separately extracting a river range for each image in the conventional method. In addition, the present disclosure quickly obtains the drying-up frequency by counting the total number of available images and the number of non-water images at the same pixel position, and yields a greater efficiency for extracting the river drying-up region and frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.