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WO2001057801A3 - Exposure control system - Google Patents

Exposure control system Download PDF

Info

Publication number
WO2001057801A3
WO2001057801A3 PCT/GB2001/000436 GB0100436W WO0157801A3 WO 2001057801 A3 WO2001057801 A3 WO 2001057801A3 GB 0100436 W GB0100436 W GB 0100436W WO 0157801 A3 WO0157801 A3 WO 0157801A3
Authority
WO
WIPO (PCT)
Prior art keywords
target
maximum speed
speed
exposure control
detecting
Prior art date
Application number
PCT/GB2001/000436
Other languages
French (fr)
Other versions
WO2001057801A2 (en
Inventor
William Mackay Ward
Original Assignee
Vai Uk Ltd
William Mackay Ward
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 Vai Uk Ltd, William Mackay Ward filed Critical Vai Uk Ltd
Publication of WO2001057801A2 publication Critical patent/WO2001057801A2/en
Publication of WO2001057801A3 publication Critical patent/WO2001057801A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Input (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

A method and apparatus for exposure control of an imaging sensor aimed at a moving target are provided. It comprises a means for reading the maximum speed of the target, means for detecting the actual speed of the target, a means for detecting light reflected from the target. Detection is repeated at a rate between that which is required to match the maximum speed of the target at half that speed. A converter is provided for the detected light to convert it into data signals representing the light intensity patterns detected. A multiplier operates on the signal for each scan where it applies a multiplication constant determined by the maximum speed and a constant speeds of the target to balance the exposure of the scans.
PCT/GB2001/000436 2000-02-02 2001-02-02 Exposure control system WO2001057801A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0002423A GB2358979B (en) 2000-02-02 2000-02-02 Exposure control system
GB0002423.2 2000-02-02

Publications (2)

Publication Number Publication Date
WO2001057801A2 WO2001057801A2 (en) 2001-08-09
WO2001057801A3 true WO2001057801A3 (en) 2001-12-27

Family

ID=9884850

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/000436 WO2001057801A2 (en) 2000-02-02 2001-02-02 Exposure control system

Country Status (2)

Country Link
GB (1) GB2358979B (en)
WO (1) WO2001057801A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8348952B2 (en) 2006-01-26 2013-01-08 Depuy International Ltd. System and method for cooling a spinal correction device comprising a shape memory material for corrective spinal surgery
JP2008199143A (en) * 2007-02-09 2008-08-28 Matsushita Electric Ind Co Ltd Image reading apparatus
CN105225254B (en) * 2015-09-25 2017-12-05 凌云光技术集团有限责任公司 A kind of exposure method and system of automatic tracing localized target

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991014173A2 (en) * 1990-03-13 1991-09-19 E.I. Du Pont De Nemours And Company Web inspection system
EP0955769A2 (en) * 1998-05-08 1999-11-10 Hewlett-Packard Company Optical scanner including exposure control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0879461A (en) * 1994-08-31 1996-03-22 Nikon Corp Image reader

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991014173A2 (en) * 1990-03-13 1991-09-19 E.I. Du Pont De Nemours And Company Web inspection system
EP0955769A2 (en) * 1998-05-08 1999-11-10 Hewlett-Packard Company Optical scanner including exposure control

Also Published As

Publication number Publication date
GB0002423D0 (en) 2000-03-22
GB2358979B (en) 2004-05-19
WO2001057801A2 (en) 2001-08-09
GB2358979A (en) 2001-08-08

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