WO2006123290A3 - Image processor comprising a contrast enhancer - Google Patents

Image processor comprising a contrast enhancer Download PDF

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Publication number
WO2006123290A3
WO2006123290A3 PCT/IB2006/051538 IB2006051538W WO2006123290A3 WO 2006123290 A3 WO2006123290 A3 WO 2006123290A3 IB 2006051538 W IB2006051538 W IB 2006051538W WO 2006123290 A3 WO2006123290 A3 WO 2006123290A3
Authority
WO
WIPO (PCT)
Prior art keywords
image processor
brightness
contrast enhancer
scale factor
extreme value
Prior art date
Application number
PCT/IB2006/051538
Other languages
French (fr)
Other versions
WO2006123290A2 (en
Inventor
Peter-Andre Redert
Original Assignee
Koninkl Philips Electronics Nv
Peter-Andre Redert
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 Koninkl Philips Electronics Nv, Peter-Andre Redert filed Critical Koninkl Philips Electronics Nv
Publication of WO2006123290A2 publication Critical patent/WO2006123290A2/en
Publication of WO2006123290A3 publication Critical patent/WO2006123290A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/10—Image enhancement or restoration using non-spatial domain filtering
    • 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
    • G06T5/94—Dynamic range modification of images or parts thereof based on local image properties, e.g. for local contrast enhancement

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Picture Signal Circuits (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Image Processing (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

An image processor comprises a contrast enhancer that multiplies a brightness- determining component (Y x,y) of an image element by a scale factor (k x,y). The scale factor (k x,y) is a function of an extreme value (P x,y) in a signal that is representative of the brightness- determining component (Y x,y) and respective brightness-determining components (Y) of neighboring image elements. In a preferred embodiment, a morphological filter (MFL) establishes aforementioned signal and provides the extreme value (P x,y) thereof.
PCT/IB2006/051538 2005-05-18 2006-05-16 Image processor comprising a contrast enhancer WO2006123290A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05300384 2005-05-18
EP05300384.4 2005-05-18

Publications (2)

Publication Number Publication Date
WO2006123290A2 WO2006123290A2 (en) 2006-11-23
WO2006123290A3 true WO2006123290A3 (en) 2007-02-15

Family

ID=37137446

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/051538 WO2006123290A2 (en) 2005-05-18 2006-05-16 Image processor comprising a contrast enhancer

Country Status (1)

Country Link
WO (1) WO2006123290A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103901378B (en) * 2012-12-26 2018-01-12 深圳联影医疗科技有限公司 The brightness control system and method for image in magnetic resonance system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5363209A (en) * 1993-11-05 1994-11-08 Xerox Corporation Image-dependent sharpness enhancement
WO2002027657A2 (en) * 2000-09-29 2002-04-04 Hewlett-Packard Company Image sharpening by variable contrast stretching
EP1209621A2 (en) * 2000-09-13 2002-05-29 Eastman Kodak Company A method for enhancing a digital image based upon pixel color

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5363209A (en) * 1993-11-05 1994-11-08 Xerox Corporation Image-dependent sharpness enhancement
EP1209621A2 (en) * 2000-09-13 2002-05-29 Eastman Kodak Company A method for enhancing a digital image based upon pixel color
WO2002027657A2 (en) * 2000-09-29 2002-04-04 Hewlett-Packard Company Image sharpening by variable contrast stretching

Also Published As

Publication number Publication date
WO2006123290A2 (en) 2006-11-23

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