CA2231820C - Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu - Google Patents

Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu Download PDF

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Publication number
CA2231820C
CA2231820C CA002231820A CA2231820A CA2231820C CA 2231820 C CA2231820 C CA 2231820C CA 002231820 A CA002231820 A CA 002231820A CA 2231820 A CA2231820 A CA 2231820A CA 2231820 C CA2231820 C CA 2231820C
Authority
CA
Canada
Prior art keywords
blue noise
image
dot
noise mask
dot profiles
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.)
Expired - Fee Related
Application number
CA002231820A
Other languages
English (en)
Other versions
CA2231820A1 (fr
Inventor
Theophano Mitsa
Kevin J. Parker
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.)
Research Corp Technologies Inc
Original Assignee
Research Corp Technologies Inc
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
Priority claimed from US07/622,056 external-priority patent/US5111310A/en
Application filed by Research Corp Technologies Inc filed Critical Research Corp Technologies Inc
Publication of CA2231820A1 publication Critical patent/CA2231820A1/fr
Application granted granted Critical
Publication of CA2231820C publication Critical patent/CA2231820C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
CA002231820A 1990-12-04 1991-12-03 Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu Expired - Fee Related CA2231820C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/622,056 US5111310A (en) 1990-12-04 1990-12-04 Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
US622,056 1990-12-04
CA002097508A CA2097508C (fr) 1990-12-04 1991-12-03 Methode et appareil pour obtenir une image en similigravure a partir d'une image a echelle de gris a l'aide d'un masque a bruit bleu

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002097508A Division CA2097508C (fr) 1990-12-04 1991-12-03 Methode et appareil pour obtenir une image en similigravure a partir d'une image a echelle de gris a l'aide d'un masque a bruit bleu

Publications (2)

Publication Number Publication Date
CA2231820A1 CA2231820A1 (fr) 1992-06-05
CA2231820C true CA2231820C (fr) 2003-02-04

Family

ID=25676249

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002231820A Expired - Fee Related CA2231820C (fr) 1990-12-04 1991-12-03 Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu
CA002231818A Expired - Fee Related CA2231818C (fr) 1990-12-04 1991-12-03 Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu
CA002231816A Expired - Fee Related CA2231816C (fr) 1990-12-04 1991-12-03 Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA002231818A Expired - Fee Related CA2231818C (fr) 1990-12-04 1991-12-03 Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu
CA002231816A Expired - Fee Related CA2231816C (fr) 1990-12-04 1991-12-03 Methode et dispositif de rendu demi-tons d'une image a niveaux de gris au moyen d'un masque a bruit bleu

Country Status (1)

Country Link
CA (3) CA2231820C (fr)

Also Published As

Publication number Publication date
CA2231820A1 (fr) 1992-06-05
CA2231818A1 (fr) 1992-06-05
CA2231816A1 (fr) 1992-06-05
CA2231818C (fr) 2002-09-24
CA2231816C (fr) 2002-07-30

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