Focus window determining method, apparatus, and device
US10491804B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2016 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Mar 29, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/675
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method includes determining to set a face area as a current focus window when a face is detected in a to-be-photographed image, detecting a preset location in the face area, adjusting a width of the current focus window according to the preset location in the face area, stretching a length of the current focus window according to at least a first preset ratio and a second preset ratio, calculating at least a contrast value of an image in the first focus window and a contrast value of an image in the second focus window, and determining a final focus window according to the at least two contrast values. Therefore, the width of the focus window is reduced such that the focus window is without background content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.