GB9720189D0 - Binarizing compensation apparatus and method - Google Patents

Binarizing compensation apparatus and method

Info

Publication number
GB9720189D0
GB9720189D0 GBGB9720189.1A GB9720189A GB9720189D0 GB 9720189 D0 GB9720189 D0 GB 9720189D0 GB 9720189 A GB9720189 A GB 9720189A GB 9720189 D0 GB9720189 D0 GB 9720189D0
Authority
GB
United Kingdom
Prior art keywords
binarizing
pixels
initial
brightness level
electronic component
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Withdrawn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
GBGB9720189.1A
Other versions
GB2317775A (en
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.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co 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 Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Publication of GB9720189D0 publication Critical patent/GB9720189D0/en
Publication of GB2317775A publication Critical patent/GB2317775A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/90—Dynamic range modification of images or parts thereof
    • G06T5/92—Dynamic range modification of images or parts thereof based on global image properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/40—Image enhancement or restoration using histogram techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/409—Edge or detail enhancement; Noise or error suppression
    • H04N1/4092—Edge or detail enhancement
    • 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
    • G06T2200/28—Indexing scheme for image data processing or generation, in general involving image processing hardware
    • 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
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30141—Printed circuit board [PCB]

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Picture Signal Circuits (AREA)
  • Image Input (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Analysis (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

An apparatus and a method compensates a binarized image signal of the printed circuit board taken by a CCD camera. First and second memories 602a, 602G store an initial binarizing reference brightness level and a reference sum of a number of pixels with respect to an electronic component to be binarizing compensated therein, respectively. A comparator circuit 604 firstly compares each of brightness levels of pixels of an image signal of the electronic component binarized by an analog-to-digital converter with the initial binarizing reference brightness level. A counter circuit 606 counts a number of the pixels having brightness levels higher than the initial binarizing reference brightness level based on the first comparison result. A second comparator 608c compares the number of the pixels counted by the counter circuit 606 with the reference sum of a number of pixels stored in the second memory 602G to control the initial binarizing reference value based on the second comparison result 608G. The apparatus binarizes image signals from a printed circuit board by varying a binarizing reference brightness level to thereby have efficiency which is not influenced by change of a periphery environment.
GB9720189A 1996-09-24 1997-09-24 Binarizing compensation apparatus and method Withdrawn GB2317775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960042002A KR100213349B1 (en) 1996-09-24 1996-09-24 Auto binarizing correction apparatus and method

Publications (2)

Publication Number Publication Date
GB9720189D0 true GB9720189D0 (en) 1997-11-26
GB2317775A GB2317775A (en) 1998-04-01

Family

ID=19475067

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9720189A Withdrawn GB2317775A (en) 1996-09-24 1997-09-24 Binarizing compensation apparatus and method

Country Status (3)

Country Link
JP (1) JPH10124663A (en)
KR (1) KR100213349B1 (en)
GB (1) GB2317775A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU565874B2 (en) * 1983-03-11 1987-10-01 Ei Solutions, Inc. Adaptive threshold circuit for digital image processing
JPH06236435A (en) * 1993-02-08 1994-08-23 Omron Corp Image processor

Also Published As

Publication number Publication date
JPH10124663A (en) 1998-05-15
GB2317775A (en) 1998-04-01
KR19980022724A (en) 1998-07-06
KR100213349B1 (en) 1999-08-02

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Legal Events

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