公开(公告)号：US10609298B2

公开(公告)日：2020-03-31

申请号：US15890254

申请日：2018-02-06

Applicant: GOOGLE LLC

Inventor： Bill Duran ,  Adrian Mircea Proca ,  Nikhil Sathe

IPC: H04N5/235 ,  G08B13/196 ,  H04N5/225 ,  H04N5/243 ,  H04N5/353 ,  H04N5/33 ,  G03B15/03 ,  H04N5/357 ,  H04N9/04

Abstract: A system and method that provides adaptive IR illumination for a camera. In some implementations, IR illumination adapts to the objects in a scene being monitored and IR illumination adaptation may be implemented in conjunction with automatic exposure and other exposure adjustment methods. Some implementations include: illuminating a scene using a first IR illumination power; capturing a first image of the scene with a camera; and determining whether a first region of the first image is underexposed or overexposed. When the first region is underexposed, the scene is illuminated at a second power level greater than the first illumination power and a second image is captured. When the first region is overexposed, the scene is illuminated at a third power level that is less than the first illumination power and a third image is captured. The operations are repeated until scene illumination is satisfactory.

公开(公告)号：US20190246025A1

公开(公告)日：2019-08-08

申请号：US15890254

申请日：2018-02-06

Applicant: GOOGLE LLC

Inventor： Bill Duran ,  Adrian Mircea Proca ,  Nikhil Sathe

IPC: H04N5/235 ,  H04N9/04 ,  H04N5/357 ,  H04N5/243 ,  H04N5/33 ,  H04N5/353 ,  G03B15/03

CPC classification number: H04N5/2354 ,  G03B15/03 ,  G08B13/19 ,  G08B13/19604 ,  H04N5/2256 ,  H04N5/2351 ,  H04N5/2353 ,  H04N5/243 ,  H04N5/33 ,  H04N5/353 ,  H04N5/3572 ,  H04N9/045

Abstract: A system and method that provides adaptive IR illumination for a camera. In some implementations, IR illumination adapts to the objects in a scene being monitored and IR illumination adaptation may be implemented in conjunction with automatic exposure and other exposure adjustment methods. Some implementations include: illuminating a scene using a first IR illumination power; capturing a first image of the scene with a camera; and determining whether a first region of the first image is underexposed or overexposed. When the first region is underexposed, the scene is illuminated at a second power level greater than the first illumination power and a second image is captured. When the first region is overexposed, the scene is illuminated at a third power level that is less than the first illumination power and a third image is captured. The operations are repeated until scene illumination is satisfactory.