SE0102254D0 - Behandling av digitala bilder - Google Patents

Behandling av digitala bilder

Info

Publication number
SE0102254D0
SE0102254D0 SE0102254A SE0102254A SE0102254D0 SE 0102254 D0 SE0102254 D0 SE 0102254D0 SE 0102254 A SE0102254 A SE 0102254A SE 0102254 A SE0102254 A SE 0102254A SE 0102254 D0 SE0102254 D0 SE 0102254D0
Authority
SE
Sweden
Prior art keywords
digital image
threshold
subarea
basis
calculation unit
Prior art date
Application number
SE0102254A
Other languages
English (en)
Other versions
SE0102254L (sv
Inventor
Andreas Olsson
Original Assignee
Anoto Ab
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 Anoto Ab filed Critical Anoto Ab
Priority to SE0102254A priority Critical patent/SE0102254L/sv
Publication of SE0102254D0 publication Critical patent/SE0102254D0/sv
Priority to EP02741593A priority patent/EP1421555A1/en
Priority to PCT/SE2002/001244 priority patent/WO2003001450A1/en
Priority to US10/179,967 priority patent/US7110604B2/en
Publication of SE0102254L publication Critical patent/SE0102254L/sv

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/70—Determining position or orientation of objects or cameras
    • G06T7/73—Determining position or orientation of objects or cameras using feature-based methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/50—Image enhancement or restoration using two or more images, e.g. averaging or subtraction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/14—Image acquisition
    • G06V30/142—Image acquisition using hand-held instruments; Constructional details of the instruments
    • G06V30/1423—Image acquisition using hand-held instruments; Constructional details of the instruments the instrument generating sequences of position coordinates corresponding to handwriting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10048—Infrared image

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Multimedia (AREA)
  • Image Analysis (AREA)
  • Image Processing (AREA)
SE0102254A 2001-06-26 2001-06-26 Behandling av digitala bilder SE0102254L (sv)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE0102254A SE0102254L (sv) 2001-06-26 2001-06-26 Behandling av digitala bilder
EP02741593A EP1421555A1 (en) 2001-06-26 2002-06-25 Processing of digital images
PCT/SE2002/001244 WO2003001450A1 (en) 2001-06-26 2002-06-25 Processing of digital images
US10/179,967 US7110604B2 (en) 2001-06-26 2002-06-26 Processing of digital images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0102254A SE0102254L (sv) 2001-06-26 2001-06-26 Behandling av digitala bilder

Publications (2)

Publication Number Publication Date
SE0102254D0 true SE0102254D0 (sv) 2001-06-26
SE0102254L SE0102254L (sv) 2002-12-27

Family

ID=20284605

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0102254A SE0102254L (sv) 2001-06-26 2001-06-26 Behandling av digitala bilder

Country Status (3)

Country Link
EP (1) EP1421555A1 (sv)
SE (1) SE0102254L (sv)
WO (1) WO2003001450A1 (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7457476B2 (en) 2001-10-03 2008-11-25 Anoto Ab Optical sensor device and a method of controlling its exposure time
JP2009543181A (ja) 2006-06-28 2009-12-03 アノト アクティエボラーク 電子ペンにおける動作制御およびデータ処理
EP2064658A4 (en) 2006-09-07 2017-08-23 Lumex As Relative threshold and use of edges in optical character recognition process
CN116629289A (zh) * 2023-05-23 2023-08-22 深圳市牛加技术有限公司 基于卷积神经网络的光学点阵二维坐标识别方法及设备

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593325A (en) 1984-08-20 1986-06-03 The Mead Corporation Adaptive threshold document duplication
US5051736A (en) 1989-06-28 1991-09-24 International Business Machines Corporation Optical stylus and passive digitizing tablet data input system
US5477012A (en) 1992-04-03 1995-12-19 Sekendur; Oral F. Optical position determination
US5852434A (en) 1992-04-03 1998-12-22 Sekendur; Oral F. Absolute optical position determination
US5661506A (en) 1994-11-10 1997-08-26 Sia Technology Corporation Pen and paper information recording system using an imaging pen
US5629780A (en) * 1994-12-19 1997-05-13 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Image data compression having minimum perceptual error
US5963676A (en) * 1997-02-07 1999-10-05 Siemens Corporate Research, Inc. Multiscale adaptive system for enhancement of an image in X-ray angiography
FR2786011B1 (fr) * 1998-11-13 2001-01-19 Centre Nat Etd Spatiales Procede de comparaison d'images enregistrees formees de pixels representant des equipotentielles d'au moins une puce de circuit integre
WO2000073983A1 (en) 1999-05-28 2000-12-07 Anoto Ab Position determination

Also Published As

Publication number Publication date
WO2003001450A1 (en) 2003-01-03
SE0102254L (sv) 2002-12-27
EP1421555A1 (en) 2004-05-26

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