Method and apparatus for switching a region of interest
US9977986B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2015 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Nov 19, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/583
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of vehicle monitoring includes: obtaining a frame of an image before exposure; outputting a luminance value of each partition of the image, accumulation number of pixels lower than a first set threshold, accumulation number of pixels higher than a second set threshold, to generate an evaluation data; generating eigenvalues of a plurality of illuminance evaluation areas based on the evaluation data and the preset illuminance evaluation area distribution table; estimating the illuminance of an environment of a vehicle according to the eigenvalues of the plurality of illuminance evaluation areas and differentiation characteristics between normal illuminance and low illuminance; switching the region of interest of a current exposing image based on the estimating results, generating a weight table based on the content of the current exposing image and the switched region of interest, controlling the exposing of the region of interest based on the weight table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.