WO2001015409A3 - Color density exposure control - Google Patents

Color density exposure control Download PDF

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Publication number
WO2001015409A3
WO2001015409A3 PCT/US2000/022620 US0022620W WO0115409A3 WO 2001015409 A3 WO2001015409 A3 WO 2001015409A3 US 0022620 W US0022620 W US 0022620W WO 0115409 A3 WO0115409 A3 WO 0115409A3
Authority
WO
WIPO (PCT)
Prior art keywords
color density
values
hue
exposure control
discrete value
Prior art date
Application number
PCT/US2000/022620
Other languages
French (fr)
Other versions
WO2001015409A2 (en
Inventor
William G Reed
Virginia Lee Aldrich
Original Assignee
Digital Now Inc
William G Reed
Virginia Lee Aldrich
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 Digital Now Inc, William G Reed, Virginia Lee Aldrich filed Critical Digital Now Inc
Priority to AU66458/00A priority Critical patent/AU6645800A/en
Publication of WO2001015409A2 publication Critical patent/WO2001015409A2/en
Publication of WO2001015409A3 publication Critical patent/WO2001015409A3/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/73—Controlling exposure by variation of spectral composition, e.g. multicolor printers
    • G03B27/735—Controlling exposure by variation of spectral composition, e.g. multicolor printers in dependence upon automatic analysis of the original
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control

Abstract

A methods and devices for using hue histograms to determine the appropriate color density adjustments for an image. The method includes the steps of sampling color density values of an image (110) converting the color density values to hue values (120), categorizing the hue values into a number of discrete value ranges (130), aggregating the hue values within each discrete value range, and determining revised color density values based on the discrete value ranges and the aggregated hue values (135).
PCT/US2000/022620 1999-08-20 2000-08-18 Color density exposure control WO2001015409A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU66458/00A AU6645800A (en) 1999-08-20 2000-08-18 Color density exposure control

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15007699P 1999-08-20 1999-08-20
US60/150,076 1999-08-20

Publications (2)

Publication Number Publication Date
WO2001015409A2 WO2001015409A2 (en) 2001-03-01
WO2001015409A3 true WO2001015409A3 (en) 2001-09-13

Family

ID=22533033

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/022620 WO2001015409A2 (en) 1999-08-20 2000-08-18 Color density exposure control

Country Status (2)

Country Link
AU (1) AU6645800A (en)
WO (1) WO2001015409A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1639807A4 (en) * 2004-05-17 2008-12-03 Seiko Epson Corp Image processing method, image processing apparatus and program
JP4277773B2 (en) * 2004-09-21 2009-06-10 株式会社日立製作所 Video display device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4929978A (en) * 1987-10-23 1990-05-29 Matsushita Electric Industrial Co., Ltd. Color correction method for color copier utilizing correction table derived from printed color samples
US5109275A (en) * 1989-12-29 1992-04-28 Matsushita Electric Industrial Co., Ltd. Printing signal correction and printer operation control apparatus utilizing neural network
US5309228A (en) * 1991-05-23 1994-05-03 Fuji Photo Film Co., Ltd. Method of extracting feature image data and method of extracting person's face data
US5408343A (en) * 1991-07-19 1995-04-18 Canon Kabushiki Kaisha Image processor in which colors in an original color image are identified as predetermined patterns on a monochromatic copy of the original
US5416848A (en) * 1992-06-08 1995-05-16 Chroma Graphics Method and apparatus for manipulating colors or patterns using fractal or geometric methods
US5822453A (en) * 1996-12-10 1998-10-13 Eastman Kodak Company Method for estimating and adjusting digital image contrast

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4929978A (en) * 1987-10-23 1990-05-29 Matsushita Electric Industrial Co., Ltd. Color correction method for color copier utilizing correction table derived from printed color samples
US5109275A (en) * 1989-12-29 1992-04-28 Matsushita Electric Industrial Co., Ltd. Printing signal correction and printer operation control apparatus utilizing neural network
US5309228A (en) * 1991-05-23 1994-05-03 Fuji Photo Film Co., Ltd. Method of extracting feature image data and method of extracting person's face data
US5408343A (en) * 1991-07-19 1995-04-18 Canon Kabushiki Kaisha Image processor in which colors in an original color image are identified as predetermined patterns on a monochromatic copy of the original
US5416848A (en) * 1992-06-08 1995-05-16 Chroma Graphics Method and apparatus for manipulating colors or patterns using fractal or geometric methods
US5822453A (en) * 1996-12-10 1998-10-13 Eastman Kodak Company Method for estimating and adjusting digital image contrast

Also Published As

Publication number Publication date
WO2001015409A2 (en) 2001-03-01
AU6645800A (en) 2001-03-19

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