公开(公告)号：US20170099427A1

公开(公告)日：2017-04-06

申请号：US14875646

申请日：2015-10-05

Applicant: Google Inc.

Inventor： Honglei Wu ,  Bo Xu ,  Boyd Albert Fowler

IPC: H04N5/232 ,  G02B7/28

CPC classification number: H04N5/23212 ,  G02B7/28 ,  H04N17/002

Abstract: Certain implementations of the disclosed technology may include methods and apparatuses for calculating an optimal lens position for a camera utilizing curve-fitting auto-focus. According to an example implementation, a method (900) is provided. The method (900) may include calculating modulation transfer function values for first and second test image frames associated with respective first and second lens positions of a camera (902, 904). The method may also include identifying, from a database including a plurality of predetermined modulation transfer function curves associated with the camera, a particular predetermined modulation transfer function curve based on the first and second modulation transfer function values (906). The method may also include calculating an optimal lens position for the camera based on the identified particular predetermined modulation transfer function curve (908).