SE0103845L - Methods and apparatus for identifying objects in digital images - Google Patents

Methods and apparatus for identifying objects in digital images

Info

Publication number
SE0103845L
SE0103845L SE0103845A SE0103845A SE0103845L SE 0103845 L SE0103845 L SE 0103845L SE 0103845 A SE0103845 A SE 0103845A SE 0103845 A SE0103845 A SE 0103845A SE 0103845 L SE0103845 L SE 0103845L
Authority
SE
Sweden
Prior art keywords
identifying objects
methods
digital images
image
current
Prior art date
Application number
SE0103845A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE0103845D0 (en
SE520474C2 (en
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 SE0103845A priority Critical patent/SE520474C2/en
Publication of SE0103845D0 publication Critical patent/SE0103845D0/en
Priority to US10/300,029 priority patent/US7283676B2/en
Priority to AU2002349854A priority patent/AU2002349854A1/en
Priority to PCT/SE2002/002104 priority patent/WO2003044740A1/en
Priority to EP02786335A priority patent/EP1449171A1/en
Publication of SE0103845L publication Critical patent/SE0103845L/en
Publication of SE520474C2 publication Critical patent/SE520474C2/en

Links

Classifications

    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns

Abstract

In a method for identifying objects in a digital image which is included in a sequence of images, luminance values of a current digital image are compared with at least one threshold value in order to create a current binarized image on the basis of the comparison. A quality measure for the current binarized image is also calculated, whereupon said at least one threshold value is updated on the basis of the quality measure for use in binarization of a subsequent image. The method can be realized in the form of a computer program, a computer program product, a device, and a hand -held apparatus for position determination.
SE0103845A 2001-11-20 2001-11-20 Methods and apparatus for identifying objects in digital images SE520474C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE0103845A SE520474C2 (en) 2001-11-20 2001-11-20 Methods and apparatus for identifying objects in digital images
US10/300,029 US7283676B2 (en) 2001-11-20 2002-11-20 Method and device for identifying objects in digital images
AU2002349854A AU2002349854A1 (en) 2001-11-20 2002-11-20 Method and a hand-held device for identifying objects in a sequence of digital images by creating binarized images based on a adaptive threshold value
PCT/SE2002/002104 WO2003044740A1 (en) 2001-11-20 2002-11-20 Method and a hand-held device for identifying objects in a sequence of digital images by creating binarized images based on a adaptive threshold value
EP02786335A EP1449171A1 (en) 2001-11-20 2002-11-20 Method and a hand-held device for identifying objects in a sequence of digital images by creating binarized images based on a adaptive threshold value

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0103845A SE520474C2 (en) 2001-11-20 2001-11-20 Methods and apparatus for identifying objects in digital images

Publications (3)

Publication Number Publication Date
SE0103845D0 SE0103845D0 (en) 2001-11-20
SE0103845L true SE0103845L (en) 2003-05-21
SE520474C2 SE520474C2 (en) 2003-07-15

Family

ID=20286029

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0103845A SE520474C2 (en) 2001-11-20 2001-11-20 Methods and apparatus for identifying objects in digital images

Country Status (4)

Country Link
EP (1) EP1449171A1 (en)
AU (1) AU2002349854A1 (en)
SE (1) SE520474C2 (en)
WO (1) WO2003044740A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008002239A1 (en) 2006-06-28 2008-01-03 Anoto Ab Operation control and data processing in an electronic pen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5923776A (en) * 1996-05-23 1999-07-13 The United States Of America As Represented By The Secretary Of The Navy Object extraction in images
US5949905A (en) 1996-10-23 1999-09-07 Nichani; Sanjay Model-based adaptive segmentation
US5960111A (en) * 1997-02-10 1999-09-28 At&T Corp Method and apparatus for segmenting images prior to coding
US6195458B1 (en) * 1997-07-29 2001-02-27 Eastman Kodak Company Method for content-based temporal segmentation of video
WO2001043071A2 (en) * 1999-12-10 2001-06-14 British Telecommunications Public Limited Company Image processing
US6678416B1 (en) * 2000-02-08 2004-01-13 University Of Washington Detecting and segmenting local deformation in a tracked video object

Also Published As

Publication number Publication date
AU2002349854A1 (en) 2003-06-10
SE0103845D0 (en) 2001-11-20
EP1449171A1 (en) 2004-08-25
WO2003044740A1 (en) 2003-05-30
SE520474C2 (en) 2003-07-15

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