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).

公开(公告)号：US20170234765A1

公开(公告)日：2017-08-17

申请号：US15290313

申请日：2016-10-11

Applicant: Google Inc.

Inventor： Vlad Constantin Cardei ,  Boyd Albert Fowler

IPC: G01M11/02 ,  G06T7/00

CPC classification number: G01M11/0292 ,  G06T7/0085 ,  G06T7/13 ,  G06T2207/30168 ,  H05K999/99

Abstract: A method of determining a modulation transfer function (MTF) for an image includes receiving an image captured through the optical system, performing edge detection on columns or rows in the image to calculate a plurality of edge points, calculating a plurality polynomials to fit to the calculated edge points, each of the plurality of polynomials varying in degree, selecting a polynomial from the plurality of polynomials to represent the detected edge, and estimating the MTF based on the selected polynomial.

公开(公告)号：US20170330909A1

公开(公告)日：2017-11-16

申请号：US15657276

申请日：2017-07-24

Applicant: Google Inc.

Inventor： Chung Chun Wan ,  Boyd Albert Fowler

IPC: H01L27/146 ,  H04N9/04 ,  H04N5/3745 ,  H04N5/369 ,  H04N13/02 ,  H04N5/225 ,  H04N5/33

CPC classification number: H01L27/14612 ,  H01L27/14603 ,  H01L27/14621 ,  H01L27/14641 ,  H01L27/14645 ,  H01L27/14649 ,  H01L27/14656 ,  H04N5/2257 ,  H04N5/332 ,  H04N5/3696 ,  H04N5/37457 ,  H04N9/045 ,  H04N13/254

Abstract: An image sensor is described having a pixel cell unit. The pixel cell unit has first, second and third transfer gate transistor gates on a semiconductor surface respectively coupled between first, second and third visible light photodiode regions and a first capacitance region. The pixel cell unit has a fourth transfer gate transistor gate on the semiconductor surface coupled between a first infrared photodiode region and a second capacitance region.

公开(公告)号：US20170317122A1

公开(公告)日：2017-11-02

申请号：US15655108

申请日：2017-07-20

Applicant: Google Inc.

Inventor： Chung Chun Wan ,  Boyd Albert Fowler

IPC: H01L27/146 ,  H04N5/3745 ,  H04N9/04 ,  H04N5/33 ,  H04N5/225

CPC classification number: H01L27/14612 ,  H01L27/14603 ,  H01L27/14609 ,  H01L27/14621 ,  H01L27/14634 ,  H01L27/14641 ,  H01L27/14645 ,  H01L27/14649 ,  H01L27/1465 ,  H04N5/2257 ,  H04N5/332 ,  H04N5/3745 ,  H04N9/045

Abstract: An image sensor is described having a pixel array. The pixel array has a unit cell that includes visible light photodiodes and an infra-red photodiode. The visible light photodiodes and the infra-red photodiode are coupled to a particular column of the pixel array. The unit cell has a first capacitor coupled to the visible light photodiodes to store charge from each of the visible-light photodiodes. The unit cell has a readout circuit to provide the first capacitor's voltage on the particular column. The unit cell has a second capacitor that is coupled to the infra-red photodiode through a first transfer gate transistor to receive charge from the infra-red photodiode during a time-of-flight exposure. The first capacitor is coupled to the infra-red photodiode through a second transfer gate transistor to receive charge from the infra-red photodiode during the time-of-flight exposure.

公开(公告)号：US20170150112A1

公开(公告)日：2017-05-25

申请号：US14952163

申请日：2015-11-25

Applicant: Google Inc.

Inventor： Honglei Wu ,  Boyd Albert Fowler

IPC: H04N9/64 ,  H04N5/225 ,  H04N1/60 ,  H04N9/07

CPC classification number: H04N1/6019 ,  H04N1/603 ,  H04N5/2256 ,  H04N9/07 ,  H04N9/67 ,  H04N17/002

Abstract: This document describes methodologies for mobile camera color management. These techniques and apparatuses enable improved consistency of color quality, faster color tuning process, adaptability to new light sources, and easier adoption on the production line than many conventional color management techniques.