Method for blurred image judgment
US7528883B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2006 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Nov 2, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for blurred image judgment is provided. Firstly, a focus value FV1 of an original image is calculated. By using a blur function, the original image is obfuscated to generate a blurred image, and then the focus value FV2 of the blurred image is calculated. A blur ratio FV1/FV2 is compared with a blur threshold value Tp, thereby discriminating whether the original image is blurred according to the comparing result. The method for blurred image judgment is applicable to a digital image capture device. If the original image is deemed blurred, a blur image signal is issued to notify the user whether the retaking operation is done.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.