JP4323663B2 - 画像フィルタ回路及び画像フィルタリング方法 - Google Patents

画像フィルタ回路及び画像フィルタリング方法 Download PDF

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Publication number
JP4323663B2
JP4323663B2 JP2000053736A JP2000053736A JP4323663B2 JP 4323663 B2 JP4323663 B2 JP 4323663B2 JP 2000053736 A JP2000053736 A JP 2000053736A JP 2000053736 A JP2000053736 A JP 2000053736A JP 4323663 B2 JP4323663 B2 JP 4323663B2
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Japan
Prior art keywords
histogram
pixel
delay
region
filter circuit
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Expired - Fee Related
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JP2000053736A
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English (en)
Japanese (ja)
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JP2001245180A (ja
JP2001245180A5 (enExample
Inventor
克己 大塚
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Canon Inc
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Canon Inc
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Priority to JP2000053736A priority Critical patent/JP4323663B2/ja
Priority to US09/791,587 priority patent/US6731820B2/en
Publication of JP2001245180A publication Critical patent/JP2001245180A/ja
Publication of JP2001245180A5 publication Critical patent/JP2001245180A5/ja
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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
    • G06T5/70—Denoising; Smoothing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/40—Image enhancement or restoration using histogram techniques

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP2000053736A 2000-02-29 2000-02-29 画像フィルタ回路及び画像フィルタリング方法 Expired - Fee Related JP4323663B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000053736A JP4323663B2 (ja) 2000-02-29 2000-02-29 画像フィルタ回路及び画像フィルタリング方法
US09/791,587 US6731820B2 (en) 2000-02-29 2001-02-26 Image filter circuit and image filtering method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000053736A JP4323663B2 (ja) 2000-02-29 2000-02-29 画像フィルタ回路及び画像フィルタリング方法

Publications (3)

Publication Number Publication Date
JP2001245180A JP2001245180A (ja) 2001-09-07
JP2001245180A5 JP2001245180A5 (enExample) 2007-04-05
JP4323663B2 true JP4323663B2 (ja) 2009-09-02

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JP2000053736A Expired - Fee Related JP4323663B2 (ja) 2000-02-29 2000-02-29 画像フィルタ回路及び画像フィルタリング方法

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US (1) US6731820B2 (enExample)
JP (1) JP4323663B2 (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7010163B1 (en) * 2001-04-20 2006-03-07 Shell & Slate Software Method and apparatus for processing image data
JP4143288B2 (ja) * 2001-11-19 2008-09-03 キヤノン株式会社 メディアンフィルタ処理装置
US20040024801A1 (en) * 2002-07-31 2004-02-05 Hamilton Robert A. System and method for computing histograms with exponentially-spaced bins
KR20040069865A (ko) * 2003-01-30 2004-08-06 삼성전자주식회사 영상화면 내의 글자영역 확장장치 및 방법
JP2004334545A (ja) * 2003-05-08 2004-11-25 Olympus Corp フィルタ回路
US7817731B2 (en) * 2003-09-22 2010-10-19 Infineon Technologies Ag Amplitude compression of signals in a multicarrier system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736439A (en) * 1985-05-24 1988-04-05 The United States Of America As Represented By The Secretary Of The Navy Image preprocessing by modified median filter
US4783753A (en) * 1986-05-07 1988-11-08 Environmental Research Inst. Of Michigan System for reducing speckle noise
US4979136A (en) * 1988-03-01 1990-12-18 Transitions Research Corporation Processing system and method for enhancing image data
US5003618A (en) * 1989-07-14 1991-03-26 University Of Pittsburgh Of The Commonwealth System Of Higher Education Automatic adaptive anisotropic digital filtering and biasing of digitized images
JPH05233802A (ja) 1992-02-13 1993-09-10 Nec Corp 高速メディアン雑音低減処理方式
US5409007A (en) * 1993-11-26 1995-04-25 General Electric Company Filter to reduce speckle artifact in ultrasound imaging
US5933540A (en) * 1995-05-11 1999-08-03 General Electric Company Filter system and method for efficiently suppressing noise and improving edge definition in a digitized image
US6078213A (en) * 1997-11-07 2000-06-20 Intel Corporation Method and hardware apparatus for implementing an N-sample median filter
FR2772486B1 (fr) * 1997-12-15 2000-01-07 Elf Exploration Prod Methode de detection automatique des heterogeneites planaires recoupant la stratification d'un milieu
US6199084B1 (en) * 1998-09-09 2001-03-06 Hitachi America, Ltd. Methods and apparatus for implementing weighted median filters

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Publication number Publication date
JP2001245180A (ja) 2001-09-07
US6731820B2 (en) 2004-05-04
US20010017943A1 (en) 2001-08-30

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