FR2397113A1 - Dispositif de production de trame electronique de demi-teintes d'angle variable - Google Patents

Dispositif de production de trame electronique de demi-teintes d'angle variable

Info

Publication number
FR2397113A1
FR2397113A1 FR7819452A FR7819452A FR2397113A1 FR 2397113 A1 FR2397113 A1 FR 2397113A1 FR 7819452 A FR7819452 A FR 7819452A FR 7819452 A FR7819452 A FR 7819452A FR 2397113 A1 FR2397113 A1 FR 2397113A1
Authority
FR
France
Prior art keywords
variable angle
electronic
production device
raster
angle half
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.)
Granted
Application number
FR7819452A
Other languages
English (en)
Other versions
FR2397113B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of FR2397113A1 publication Critical patent/FR2397113A1/fr
Application granted granted Critical
Publication of FR2397113B1 publication Critical patent/FR2397113B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4058—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern with details for producing a halftone screen at an oblique angle

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
  • Color Image Communication Systems (AREA)

Abstract

L'invention concerne un dispositif de formation de trame de demi-teintes électronique, d'angle variable. Un signal électronique représentant la densité d'une image est tramé électroniquement en le combinant avec une matrice rectangulaire de valeurs de trame pour former une image électronique tramée. La trame électronique peut être tournée d'angle variable en définissant une matrice rectangulaire répétitive et en incorporant un paramètre de décalage de cette matrice. L'invention s'applique particulièrement à la reproduction électronique d'images a modelé continu.
FR7819452A 1977-07-07 1978-06-29 Dispositif de production de trame electronique de demi-teintes d'angle variable Expired FR2397113B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/813,599 US4149194A (en) 1977-07-07 1977-07-07 Variable angle electronic halftone screening

Publications (2)

Publication Number Publication Date
FR2397113A1 true FR2397113A1 (fr) 1979-02-02
FR2397113B1 FR2397113B1 (fr) 1985-11-15

Family

ID=25212864

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7819452A Expired FR2397113B1 (fr) 1977-07-07 1978-06-29 Dispositif de production de trame electronique de demi-teintes d'angle variable

Country Status (7)

Country Link
US (1) US4149194A (fr)
JP (1) JPS5418303A (fr)
CA (1) CA1114746A (fr)
DE (1) DE2829768A1 (fr)
FR (1) FR2397113B1 (fr)
GB (1) GB1602557A (fr)
NL (1) NL7807365A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652429A1 (fr) * 1989-09-28 1991-03-29 Sun Microsystems Inc Procede et dispositif pour realiser le luancage aligne de vecteurs.

Families Citing this family (114)

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JPS5465602A (en) * 1977-11-01 1979-05-26 Dainippon Screen Mfg Method of scanning and recording halftone image
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JPH0279670A (ja) * 1988-09-16 1990-03-20 Dainippon Screen Mfg Co Ltd 網目版画像走査記録装置
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DE4038056C2 (de) * 1990-11-29 1997-05-15 Hell Ag Linotype Verfahren zur Generierung und Speicherung von digitalisierten Dichteschwellwerten zur Rasterung einer Halbton-Bildvorlage
DE4038057C2 (de) * 1990-11-29 1997-05-15 Hell Ag Linotype Verfahren zur Generierung und Speicherung von digitalisierten Dichteschwellwerten zur Rasterung einer Halbtonbildvorlage
US5341228A (en) * 1990-12-04 1994-08-23 Research Corporation Technologies Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
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US5223953A (en) * 1991-06-24 1993-06-29 Xerox Corporation Screening circuit for variable angle screening of image pixels
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US5442461A (en) * 1991-09-03 1995-08-15 Levien; Raphael L. Screen generation for halftone screening of images with reduction of irrational correction artifacts
US5307181A (en) * 1991-09-03 1994-04-26 Levien Raphael L Screen generation for halftone screening of images using scan line segments of oversized screen scan lines
US5315406A (en) * 1991-09-03 1994-05-24 Levien Raphael L Screen generation for halftone screening of images using arbitrary distribution of transformed screen coordinates
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US5859955A (en) * 1997-01-21 1999-01-12 Xerox Corporation Stochastically clustered dot halftoning system
US5898822A (en) * 1997-03-27 1999-04-27 Xerox Corporation Using the phase information in the halftone dot structure to minimize artifacts when switching between halftone dots on a scan line
US6014226A (en) * 1997-07-01 2000-01-11 Xerox Corporation Multilevel halftoning with reduced texture contours and coverage control
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FR2304233A1 (fr) * 1975-03-14 1976-10-08 Xerox Corp Procede et appareil de reproduction d'images en demi-teintes par tramage electronique

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FR2298242A1 (fr) * 1975-01-20 1976-08-13 Ibm Generateur et procede d'impression en pseudo demi-ton
FR2304233A1 (fr) * 1975-03-14 1976-10-08 Xerox Corp Procede et appareil de reproduction d'images en demi-teintes par tramage electronique

Non-Patent Citations (1)

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Title
EXRV/70 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652429A1 (fr) * 1989-09-28 1991-03-29 Sun Microsystems Inc Procede et dispositif pour realiser le luancage aligne de vecteurs.

Also Published As

Publication number Publication date
FR2397113B1 (fr) 1985-11-15
NL7807365A (nl) 1979-01-09
GB1602557A (en) 1981-11-11
DE2829768A1 (de) 1979-01-25
JPS5418303A (en) 1979-02-10
US4149194A (en) 1979-04-10
CA1114746A (fr) 1981-12-22

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