WO2002065107A8 - Web inspection system - Google Patents

Web inspection system

Info

Publication number
WO2002065107A8
WO2002065107A8 PCT/US2002/001863 US0201863W WO02065107A8 WO 2002065107 A8 WO2002065107 A8 WO 2002065107A8 US 0201863 W US0201863 W US 0201863W WO 02065107 A8 WO02065107 A8 WO 02065107A8
Authority
WO
WIPO (PCT)
Prior art keywords
web
inspection system
flaws
web material
location
Prior art date
Application number
PCT/US2002/001863
Other languages
French (fr)
Other versions
WO2002065107A2 (en
WO2002065107A3 (en
Inventor
Sujoy D Guha
Chris M Kiraly
Robin D Becker
Original Assignee
Wintriss Engineering Corp
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 Wintriss Engineering Corp filed Critical Wintriss Engineering Corp
Priority to EP02718860A priority Critical patent/EP1373878A2/en
Priority to CA002437778A priority patent/CA2437778A1/en
Publication of WO2002065107A2 publication Critical patent/WO2002065107A2/en
Publication of WO2002065107A3 publication Critical patent/WO2002065107A3/en
Publication of WO2002065107A8 publication Critical patent/WO2002065107A8/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8901—Optical details; Scanning details
    • G01N21/8903—Optical details; Scanning details using a multiple detector array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N2021/8909—Scan signal processing specially adapted for inspection of running sheets
    • G01N2021/891—Edge discrimination, e.g. by signal filtering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N21/8921—Streaks
    • 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
    • G06T2207/30124—Fabrics; Textile; Paper

Abstract

A web inspection system (300) provides detection of web flaws along the machine direction and cross direction of a web. The detectable percent contrast between good web material and bad web material in one embodiment approaches noise level. The web inspection system (300) utilizes a multiple of smart cameras (302, 330) connected to a host computer (332) via an ethernet hub (328). Each smart camera (302, 330) includes a line scan camera (304) for producing digital pixels, a means for lighting and pixel correction (306) on a pixel by pixels basis, a web edge detector (308) for monitoring the edges of a web, a multi-pipeline flaw detection pre-processor (310) for detecting very small changes in the web material, a run length encoder (312) for generating data regarding the location of each group of potential flaws in a cross direction, a 2D blob detector (316) and analyzer (320) for generating data regarding the location of block flaws along a machine direction, and an inspect/reject analysis (324) for determining the actual flaw data from the potential flaw data.
PCT/US2002/001863 2001-02-09 2002-01-23 Web inspection system WO2002065107A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02718860A EP1373878A2 (en) 2001-02-09 2002-01-23 Web inspection system
CA002437778A CA2437778A1 (en) 2001-02-09 2002-01-23 Web inspection system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/780,313 US6750466B2 (en) 2001-02-09 2001-02-09 Web inspection system
US09/780,313 2001-02-09

Publications (3)

Publication Number Publication Date
WO2002065107A2 WO2002065107A2 (en) 2002-08-22
WO2002065107A3 WO2002065107A3 (en) 2003-06-26
WO2002065107A8 true WO2002065107A8 (en) 2003-11-13

Family

ID=25119244

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/001863 WO2002065107A2 (en) 2001-02-09 2002-01-23 Web inspection system

Country Status (4)

Country Link
US (2) US6750466B2 (en)
EP (1) EP1373878A2 (en)
CA (1) CA2437778A1 (en)
WO (1) WO2002065107A2 (en)

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Also Published As

Publication number Publication date
US7408570B2 (en) 2008-08-05
WO2002065107A2 (en) 2002-08-22
WO2002065107A3 (en) 2003-06-26
CA2437778A1 (en) 2002-08-22
US20020109112A1 (en) 2002-08-15
US20040201669A1 (en) 2004-10-14
US6750466B2 (en) 2004-06-15
EP1373878A2 (en) 2004-01-02

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