CA2549622C - System and method for comparing images with different contrast levels - Google Patents

System and method for comparing images with different contrast levels Download PDF

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Publication number
CA2549622C
CA2549622C CA2549622A CA2549622A CA2549622C CA 2549622 C CA2549622 C CA 2549622C CA 2549622 A CA2549622 A CA 2549622A CA 2549622 A CA2549622 A CA 2549622A CA 2549622 C CA2549622 C CA 2549622C
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CA
Canada
Prior art keywords
derivative
digital image
gray level
contrast
level
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.)
Expired - Lifetime
Application number
CA2549622A
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English (en)
French (fr)
Other versions
CA2549622A1 (en
Inventor
Michael C. Hutchinson
Michael D. Horky
Mark A. Lee
William D. Meade
James C. Kennedy
Thomas E. Riechers
Michael J. Duncan
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Boeing Co
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Boeing Co
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Publication of CA2549622A1 publication Critical patent/CA2549622A1/en
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Publication of CA2549622C publication Critical patent/CA2549622C/en
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06T7/001—Industrial image inspection using an image reference approach
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10116—X-ray image
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06T2207/30136—Metal
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06T2207/30164—Workpiece; Machine component

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Image Processing (AREA)
  • Image Analysis (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Television Receiver Circuits (AREA)
CA2549622A 2004-01-09 2005-01-06 System and method for comparing images with different contrast levels Expired - Lifetime CA2549622C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US53535804P 2004-01-09 2004-01-09
US60/535,358 2004-01-09
US11/018,840 US7561753B2 (en) 2004-01-09 2004-12-21 System and method for comparing images with different contrast levels
US11/018,840 2004-12-21
PCT/US2005/000645 WO2005069218A2 (en) 2004-01-09 2005-01-06 System and method for comparing images with different contrast levels

Publications (2)

Publication Number Publication Date
CA2549622A1 CA2549622A1 (en) 2005-07-28
CA2549622C true CA2549622C (en) 2011-02-15

Family

ID=34742387

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2549622A Expired - Lifetime CA2549622C (en) 2004-01-09 2005-01-06 System and method for comparing images with different contrast levels

Country Status (6)

Country Link
US (2) US7561753B2 (enExample)
EP (1) EP1702303B1 (enExample)
JP (1) JP5068079B2 (enExample)
CA (1) CA2549622C (enExample)
RU (1) RU2367022C2 (enExample)
WO (1) WO2005069218A2 (enExample)

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CN110458816B (zh) * 2019-08-06 2021-04-27 北京工商大学 一种基于阈值回归的纤维材料孔隙率分析方法
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Also Published As

Publication number Publication date
US7747099B2 (en) 2010-06-29
JP5068079B2 (ja) 2012-11-07
JP2007524940A (ja) 2007-08-30
EP1702303B1 (en) 2015-05-27
WO2005069218A8 (en) 2005-09-09
RU2367022C2 (ru) 2009-09-10
EP1702303A2 (en) 2006-09-20
US7561753B2 (en) 2009-07-14
RU2006128871A (ru) 2008-02-20
US20090232412A1 (en) 2009-09-17
WO2005069218A2 (en) 2005-07-28
CA2549622A1 (en) 2005-07-28
US20050152615A1 (en) 2005-07-14
WO2005069218A3 (en) 2006-02-23

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