WO2002056255A3 - Methods and apparatus for analyzing an image - Google Patents

Methods and apparatus for analyzing an image Download PDF

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Publication number
WO2002056255A3
WO2002056255A3 PCT/US2001/045584 US0145584W WO02056255A3 WO 2002056255 A3 WO2002056255 A3 WO 2002056255A3 US 0145584 W US0145584 W US 0145584W WO 02056255 A3 WO02056255 A3 WO 02056255A3
Authority
WO
WIPO (PCT)
Prior art keywords
image
elements
edge
characteristic
blob
Prior art date
Application number
PCT/US2001/045584
Other languages
French (fr)
Other versions
WO2002056255A2 (en
Inventor
Jian Fan
Original Assignee
Hewlett-Packard Company
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 Hewlett-Packard Company filed Critical Hewlett-Packard Company
Priority to JP2002556841A priority Critical patent/JP4098087B2/en
Priority to AU2002239437A priority patent/AU2002239437A1/en
Priority to EP01987198A priority patent/EP1334462B1/en
Priority to DE60118240T priority patent/DE60118240T2/en
Publication of WO2002056255A2 publication Critical patent/WO2002056255A2/en
Publication of WO2002056255A3 publication Critical patent/WO2002056255A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/20—Image enhancement or restoration using local operators
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/73—Deblurring; Sharpening
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/12—Edge-based segmentation
    • 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
    • G06V30/148—Segmentation of character regions
    • G06V30/15—Cutting or merging image elements, e.g. region growing, watershed or clustering-based techniques
    • 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
    • G06V30/18—Extraction of features or characteristics of the image
    • G06V30/18105—Extraction of features or characteristics of the image related to colour
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2200/00—Indexing scheme for image data processing or generation, in general
    • G06T2200/24—Indexing scheme for image data processing or generation, in general involving graphical user interfaces [GUIs]
    • 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
    • G06T2207/10004—Still image; Photographic image
    • G06T2207/10008—Still image; Photographic image from scanner, fax or copier
    • 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
    • G06T2207/20—Special algorithmic details
    • G06T2207/20172—Image enhancement details
    • G06T2207/20192—Edge enhancement; Edge preservation
    • 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
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30176—Document
    • 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

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)
  • Facsimile Image Signal Circuits (AREA)
  • Character Input (AREA)
  • Image Processing (AREA)

Abstract

A method analyzes an image (146) to be scanned and analyzes at least part of the image pixel-by-pixel. Elements in the image are characterized (118) according to a perceived characteristic and each image element having a given characteristic (158, 160A-D, 162) that is adjacent a similar or identical image element is identified. In one form, there are preferably at least three different characteristics, such as black, background and edge, by which the image elements can be characterized. In another form, image elements that are close enough to each other in physical location and close enough to each other in image characteristic are grouped together or included in a blob. Sub-blobs (152) can be found to be part of a more predominant blob. In a further form, image elements are identified that represent an edge in the image, along with identifying those edge elements (160B) that are adjacent at east one other edge element (160B).
PCT/US2001/045584 2000-11-09 2001-10-25 Methods and apparatus for analyzing an image WO2002056255A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2002556841A JP4098087B2 (en) 2000-11-09 2001-10-25 Method and apparatus for analyzing images
AU2002239437A AU2002239437A1 (en) 2000-11-09 2001-10-25 Methods and apparatus for analyzing an image
EP01987198A EP1334462B1 (en) 2000-11-09 2001-10-25 Method for analyzing an image
DE60118240T DE60118240T2 (en) 2000-11-09 2001-10-25 METHOD FOR IMAGE ANALYSIS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/709,685 2000-11-09
US09/709,685 US7672022B1 (en) 2000-04-07 2000-11-09 Methods and apparatus for analyzing an image

Publications (2)

Publication Number Publication Date
WO2002056255A2 WO2002056255A2 (en) 2002-07-18
WO2002056255A3 true WO2002056255A3 (en) 2002-10-31

Family

ID=24850914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/045584 WO2002056255A2 (en) 2000-11-09 2001-10-25 Methods and apparatus for analyzing an image

Country Status (6)

Country Link
US (1) US7672022B1 (en)
EP (1) EP1334462B1 (en)
JP (1) JP4098087B2 (en)
AU (1) AU2002239437A1 (en)
DE (1) DE60118240T2 (en)
WO (1) WO2002056255A2 (en)

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Also Published As

Publication number Publication date
JP4098087B2 (en) 2008-06-11
DE60118240T2 (en) 2006-09-07
WO2002056255A2 (en) 2002-07-18
DE60118240D1 (en) 2006-05-11
EP1334462B1 (en) 2006-03-22
JP2004529404A (en) 2004-09-24
AU2002239437A1 (en) 2002-07-24
EP1334462A2 (en) 2003-08-13
US7672022B1 (en) 2010-03-02

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