公开(公告)号：US10401158B2

公开(公告)日：2019-09-03

申请号：US15912917

申请日：2018-03-06

Applicant: Apple Inc.

Inventor： Thorsten Gernoth ,  Ian R. Fasel ,  Haitao Guo ,  Atulit Kumar

IPC: G01B11/25 ,  G01B11/14 ,  G06T7/73 ,  G06T7/514 ,  G06K9/00 ,  G06K9/20 ,  H04N5/225 ,  H04N5/33

Abstract: An estimate of distance between a user and a camera on a device is used to determine an illumination pattern density used for speckle pattern illumination of the user in subsequent images. The distance may be estimated using an image captured when the user is illuminated with flood infrared illumination. Either a sparse speckle (dot) pattern illumination pattern or a dense speckle pattern illumination pattern is used depending on the distance between the user's face and the camera.