Title:
AUTOFOCUSING METHOD, DEVICE AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/101292
Kind Code:
A1
Abstract:
Provided are a method, a device and a system for autofocusing. The method comprises: obtaining a pupil image of a human eye pupil; performing an image degradation on the pupil image to obtain a degraded image; determining a relative reference image according to the pupil image and the degraded image, the relative reference image being a convolution of the pupil image and the degraded image; determining an image quality evaluation index according to a normalized value of a maximum gradient of the pupil image and image structure similarity; finally, controlling a camera to focus according to the image quality evaluation index. The image structure similarity is the structural similarity between the pupil image and the relative reference image. The method can control the camera to have a good focusing effect.
Inventors:
CUI JIAN (CN)
WANG HAOLEI (CN)
WANG HAOLEI (CN)
Application Number:
PCT/CN2016/087587
Publication Date:
June 22, 2017
Filing Date:
June 29, 2016
Export Citation:
Assignee:
SHENZHEN HUIDING TECHNOLOGY CO (CN)
International Classes:
H04N5/232
Foreign References:
| CN202602795U | 2012-12-12 | |||
| CN103067662A | 2013-04-24 | |||
| US20130187773A1 | 2013-07-25 | |||
| US20100231504A1 | 2010-09-16 | |||
| CN104834446A | 2015-08-12 | |||
| CN101976444A | 2011-02-16 |
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
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