GB2477633A - Optical image stabilisation for camera blur reduction - Google Patents

Optical image stabilisation for camera blur reduction Download PDF

Info

Publication number
GB2477633A
GB2477633A GB1101785A GB201101785A GB2477633A GB 2477633 A GB2477633 A GB 2477633A GB 1101785 A GB1101785 A GB 1101785A GB 201101785 A GB201101785 A GB 201101785A GB 2477633 A GB2477633 A GB 2477633A
Authority
GB
United Kingdom
Prior art keywords
tilt
camera
translational motion
compensating
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1101785A
Other versions
GB201101785D0 (en
Inventor
Andrew Benjamin David Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cambridge Mechatronics Ltd
Original Assignee
Cambridge Mechatronics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cambridge Mechatronics Ltd filed Critical Cambridge Mechatronics Ltd
Publication of GB201101785D0 publication Critical patent/GB201101785D0/en
Publication of GB2477633A publication Critical patent/GB2477633A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G02B27/648—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake for automatically maintaining a reference alignment, e.g. in self-levelling surveying instruments
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • H04N5/23248—
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0076—Driving means for the movement of one or more optical element using shape memory alloys
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/005—Blur detection

Abstract

A mechanism uses accelerometer and focus information to reduce the effect of translational handshake on the still or video image recorded by a device such as a camera. The device is for acquiring still or video image data and has an image sensor and lens, a mechanism for compensating for tilt, a mechanism to measure tilt, an accelerometer for measuring the translational e.g. lateral motion of the device, and a focusing mechanism to focus the image on the image sensor. The amount of tilt compensated for by the tilt compensation mechanism is equal to the apparent tilt caused by the translational motion of the device plus the tilt of the device.

Description

Optical image stabilisation
Description
Optical image stabilisation is a method for reducing the blur or motion of an image as recorded by a camera. Typically image stabilization has been used for taking photographs at a large distance from the camera and often with a narrow field of view where changes in the camera angle are most significant.
There are a number of methods that have been proposed in the literature allowing the camera to compensate for the tilt of the camera such as tilting the lens and sensor assembly, moving the lens, moving the sensor, moving a lens element or electronically moving the image to compensate for tilt of the camera.
If the object being photographed is close to the camera, for example when macro photographs are taken, then once the tilt of the camera has been compensated for, the dominant source of blur on the image is the lateral motion of the camera.
This document describes a device capable of compensating for this motion, thereby improving the stabilisation of the image.
The device of the invention contains a camera with a focusing mechanism and an optical image stabilisation system that contains a gyroscope to measure the tilt of the camera as in known image stabilisation systems, and in addition an accelerometer. For clarity it will be assumed that the image stabilisation system tilts the whole camera, but this invention could also be applied to any of the other optical image stabilisation techniques mentioned above. An example of an image stabilisation system which tilts the whole camera is that described in the co-owned international patent application numbers PCT/GB2009/0021 95 and PCT/0B201 0/000154. This image stablllsation system uses one or more shape memory alloy (SMA) actuators to tilt the camera.
In the device of the invention, the focusing mechanism provides information about the distance from the camera to the object being photographed. The accelerometer is used to provide information about the lateral motion of the camera. The device combines information from the focusing mechanism and information from the accelerometer to calculate the angle through which the object moves due to the lateral motion of the camera when viewed from the camera. This angle is combined with the data from the gyroscope in the optical image stabilisation system thereby allowing calculation of the compensation angle to be applied in the optical image stabilisation mechanism, to compensate for both the angular vibration and the positional vibration of the camera.
The apparent tilt caused by the translational motion of the camera is equal to the inverse sine of the translational motion of the camera in a direction normal to the optical axis of the camera divided by the distance at which the camera is focussed. This provides the necessary compensation angle.

Claims (3)

  1. Claims 1) A device for acquiring still or video image data containing an image sensor and lens a mechanism for compensating for tilt of the device, a mechanism to measure tilt of the device, an accelerometer for measuring the translational motion of the device, a focusing mechanism to focus the image on the image sensor wherein the amount of tilt compensated for by the mechanism for compensating for tilt of the device is equal to the apparent tilt caused by the translational motion of the device plus the tilt of the device.
  2. 2) A device according to claim 1 where the apparent tilt caused by the translational motion of the camera is equal to the inverse sine of the translational motion of the camera in a direction normal to the optical axis of the camera divided by the distance at which the camera is focused.
  3. 3) A device according to claim 1 or 2 wherein the translational motion of the device is measured by the accelerometer 4) A device according to any preceding claim where the mechanism for compensating for the tilt of the device contains a mechanism that tilts the lens and image sensor 5) A device according to any preceding claim wherein the mechanism for compensating for the tilt of the device comprises SMA actuators.6) A device according to any preceding claim where the device is a mobile phone.
GB1101785A 2010-02-05 2011-02-02 Optical image stabilisation for camera blur reduction Withdrawn GB2477633A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1001887.7A GB201001887D0 (en) 2010-02-05 2010-02-05 Optical image stabalisation

Publications (2)

Publication Number Publication Date
GB201101785D0 GB201101785D0 (en) 2011-03-16
GB2477633A true GB2477633A (en) 2011-08-10

Family

ID=42082522

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB1001887.7A Ceased GB201001887D0 (en) 2010-02-05 2010-02-05 Optical image stabalisation
GB1101785A Withdrawn GB2477633A (en) 2010-02-05 2011-02-02 Optical image stabilisation for camera blur reduction

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB1001887.7A Ceased GB201001887D0 (en) 2010-02-05 2010-02-05 Optical image stabalisation

Country Status (1)

Country Link
GB (2) GB201001887D0 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0658797A1 (en) * 1993-12-14 1995-06-21 Nikon Corporation Image movement correction of camera
US5794078A (en) * 1995-09-11 1998-08-11 Nikon Corporation Image movement correction of camera
US6047132A (en) * 1998-03-04 2000-04-04 Nikon Corporation Camera system and interchangeable lens to compensate for image blur when photographing at close range
WO2007113478A1 (en) * 2006-03-30 2007-10-11 1...Limited Camera lens actuation apparatus
US20080069552A1 (en) * 2006-09-14 2008-03-20 Canon Kabushiki Kaisha Image stabilizing system and optical apparatus
EP1933189A1 (en) * 2006-12-12 2008-06-18 Canon Kabushiki Kaisha Image pickup apparatus including image shake correction
WO2010008061A1 (en) * 2008-07-15 2010-01-21 Canon Kabushiki Kaisha Image stabilization control apparatus and imaging apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0658797A1 (en) * 1993-12-14 1995-06-21 Nikon Corporation Image movement correction of camera
US5794078A (en) * 1995-09-11 1998-08-11 Nikon Corporation Image movement correction of camera
US6047132A (en) * 1998-03-04 2000-04-04 Nikon Corporation Camera system and interchangeable lens to compensate for image blur when photographing at close range
WO2007113478A1 (en) * 2006-03-30 2007-10-11 1...Limited Camera lens actuation apparatus
US20080069552A1 (en) * 2006-09-14 2008-03-20 Canon Kabushiki Kaisha Image stabilizing system and optical apparatus
EP1933189A1 (en) * 2006-12-12 2008-06-18 Canon Kabushiki Kaisha Image pickup apparatus including image shake correction
WO2010008061A1 (en) * 2008-07-15 2010-01-21 Canon Kabushiki Kaisha Image stabilization control apparatus and imaging apparatus

Also Published As

Publication number Publication date
GB201101785D0 (en) 2011-03-16
GB201001887D0 (en) 2010-03-24

Similar Documents

Publication Publication Date Title
US9979889B2 (en) Combined optical and electronic image stabilization
US10284780B2 (en) Auto focus and optical image stabilization with roll compensation in a compact folded camera
CN106911879B (en) Image forming apparatus module, method of operating the same, and terminal device including the same
JP4844177B2 (en) Blur correction device and camera
JP6209002B2 (en) Imaging apparatus and control method thereof
KR102179981B1 (en) Anti-shake correction system for curved optical sensor
JP6214316B2 (en) Image blur correction device, lens device, imaging device, image blur correction device control method, program, and storage medium
US9681052B1 (en) Multi-aperture camera with optical image stabilization function
JP2018189730A (en) Image tremor correction device and control method for the same, program therefor, and storage medium
JP2013205550A (en) Position detection device and position control device
US10708502B2 (en) Camera device and shake correction method
JP2013205549A (en) Position control device
US20150168722A1 (en) Apparatus and method for controlling position of display in wearable device
US20180288329A1 (en) Camera device and shake correction method
EP3275173B1 (en) Image capture system with motion compensation
WO2008100153A1 (en) A device for providing stabilized images in a hand held camera
US10412306B1 (en) Optical image stabilization method and apparatus
US20170358101A1 (en) Optical Image Stabilization for Depth Sensing
US20120268614A1 (en) Imaging device
KR20160087684A (en) Apparatus and method for forming high resolution image using optical image stabilizer
EP3474535B1 (en) Image synthesis method and device for mobile terminal
JP2015179988A (en) Image processing system, image processing apparatus, image processing method, and program
GB2477633A (en) Optical image stabilisation for camera blur reduction
US9667869B2 (en) Camera apparatus for automatically maintaining horizontality and method for the same
JP2019102833A (en) Imaging apparatus and control method

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)