WO2006120585A3 - Image enhancement - Google Patents

Image enhancement Download PDF

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Publication number
WO2006120585A3
WO2006120585A3 PCT/IB2006/050641 IB2006050641W WO2006120585A3 WO 2006120585 A3 WO2006120585 A3 WO 2006120585A3 IB 2006050641 W IB2006050641 W IB 2006050641W WO 2006120585 A3 WO2006120585 A3 WO 2006120585A3
Authority
WO
WIPO (PCT)
Prior art keywords
images
sub
image
pixel
calculating
Prior art date
Application number
PCT/IB2006/050641
Other languages
French (fr)
Other versions
WO2006120585A2 (en
Inventor
Der Heijden Henricus W P Van
Original Assignee
Koninkl Philips Electronics Nv
Der Heijden Henricus W P Van
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, Der Heijden Henricus W P Van filed Critical Koninkl Philips Electronics Nv
Publication of WO2006120585A2 publication Critical patent/WO2006120585A2/en
Publication of WO2006120585A3 publication Critical patent/WO2006120585A3/en

Links

Classifications

    • G06T5/73—
    • 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
    • G06T2207/20—Special algorithmic details
    • G06T2207/20016—Hierarchical, coarse-to-fine, multiscale or multiresolution image processing; Pyramid transform

Abstract

The invention relates to a method for image enhancement. Overshoots of image boosting in areas with edges can be prevented by splitting an image into at least three sub-images, wherein each of the sub-images represents a corresponding spatial frequency range of the image, calculating a pixel detail signal for at least one of the sub-images, depending on at least a pixel detail signal of another frequency range, calculating a pixel change value for pixels within the sub-images depending on the corresponding pixel detail signal, calculating changed sub-images by changing pixel values within the sub-images depending on the corresponding pixel change value, and combining the changed sub-images into an output image.
PCT/IB2006/050641 2005-03-03 2006-03-01 Image enhancement WO2006120585A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP05101656 2005-03-03
EP05101656.6 2005-03-03
EP05106507 2005-07-15
EP05106507.6 2005-07-15

Publications (2)

Publication Number Publication Date
WO2006120585A2 WO2006120585A2 (en) 2006-11-16
WO2006120585A3 true WO2006120585A3 (en) 2007-04-05

Family

ID=37396941

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/050641 WO2006120585A2 (en) 2005-03-03 2006-03-01 Image enhancement

Country Status (1)

Country Link
WO (1) WO2006120585A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111899176B (en) * 2020-07-31 2022-08-12 罗雄彪 Video image enhancement method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0574969A2 (en) * 1992-06-19 1993-12-22 Agfa-Gevaert N.V. A method and apparatus for noise reduction
US5461655A (en) * 1992-06-19 1995-10-24 Agfa-Gevaert Method and apparatus for noise reduction
US6252931B1 (en) * 1998-10-24 2001-06-26 U.S. Philips Corporation Processing method for an original image

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0574969A2 (en) * 1992-06-19 1993-12-22 Agfa-Gevaert N.V. A method and apparatus for noise reduction
US5461655A (en) * 1992-06-19 1995-10-24 Agfa-Gevaert Method and apparatus for noise reduction
US6252931B1 (en) * 1998-10-24 2001-06-26 U.S. Philips Corporation Processing method for an original image

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
JIAN LU ET AL: "Contrast enhancement via multiscale gradient transformation", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP) AUSTIN, NOV. 13 - 16, 1994, LOS ALAMITOS, IEEE COMP. SOC. PRESS, US, vol. VOL. 3 CONF. 1, 13 November 1994 (1994-11-13), pages 482 - 486, XP010146217, ISBN: 0-8186-6952-7 *
MARTENS J: "Adaptive contrast enhancement through residue-image processing", SIGNAL PROCESSING, ELSEVIER SCIENCE PUBLISHERS B.V. AMSTERDAM, NL, vol. 44, no. 1, June 1995 (1995-06-01), pages 1 - 18, XP004062083, ISSN: 0165-1684 *
STAHL MARTIN ET AL: "Digital radiography enhancement by nonlinear multiscale processing", MEDICAL PHYSICS, AIP, MELVILLE, NY, US, vol. 27, no. 1, January 2000 (2000-01-01), pages 56 - 65, XP012010959, ISSN: 0094-2405 *

Also Published As

Publication number Publication date
WO2006120585A2 (en) 2006-11-16

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