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1. WO2000039749 - SYSTEM AND METHOD FOR PRINT ANALYSIS

Publication Number WO/2000/039749
Publication Date 06.07.2000
International Application No. PCT/US1999/030881
International Filing Date 23.12.1999
Chapter 2 Demand Filed 12.07.2000
IPC
B41J 2/21 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
005characterised by bringing liquid or particles selectively into contact with a printing material
01Ink jet
21for multi-colour printing
H04N 1/60 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
46Colour picture communication systems
56Processing of colour picture signals
60Colour correction or control
CPC
B41J 2/2135
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, ; e.g. INK-JET PRINTERS, THERMAL PRINTERS; , i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
005characterised by bringing liquid or particles selectively into contact with a printing material
01Ink jet
21for multi-colour printing
2132Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
2135Alignment of dots
H04N 1/6033
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
46Colour picture communication systems
56Processing of colour picture signals
60Colour correction or control
603controlled by characteristics of the picture signal generator or the picture reproducer
6033using test pattern analysis
Applicants
  • CHAMPION INTERNATIONAL CORPORATION [US/US]; 1 Champion Plaza Stamford, CT 06901, US
Inventors
  • AMERO, Bernard, A.; US
  • ROSENBERGER, Roy; US
Agents
  • JAKOBSEN, James, W.; Cummings & Lockwood 700 State Street P.O. Box 1960 New Haven, CT 06509-1960, US
Priority Data
09/220,66924.12.1998US
null22.12.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEM AND METHOD FOR PRINT ANALYSIS
(FR) SYSTEME ET PROCEDE D'ANALYSE D'UN IMPRIME
Abstract
(EN)
A system and method is disclosed for analyzing a test pattern printed by a printing device onto a substrate to determine the printing properties of the substrate. The test pattern includes: (i) a first cell having a background of a first color and a pattern of a second color and (ii) a second cell having a background of the second color and a pattern of the first color. The patterns each include a plurality of dots that are randomly positioned within each pattern. Prior to analyzing the test pattern, the first and second colors are differentiated from each other using color-band and threshold selection techniques. A variety of print defect indices are disclosed for analyzing the test pattern including a gain index, a raggedness index, a circularity index, and a non-uniformity index. The results of analysis can be calculated as a single value for a simple and convenient representation of the print quality of the substrate.
(FR)
La présente invention concerne un système et un procédé d'analyse d'une mire imprimée sur un substrat avec un dispositif d'impression, en vue de déterminer les propriétés d'impression du substrat. Cette mire comprend: (i) une première cellule avec un fond de première couleur et un motif de seconde couleur, et (ii) une seconde cellule avec un fond de seconde couleur et un motif de première couleur. Ces motifs comprennent chacun une pluralité de points placés au hasard. Avant d'analyser la mire, les première et seconde couleurs sont différenciées l'une de l'autre en utilisant des techniques de sélection de colonne de couleur et de seuil. En outre, cette invention concerne une grande variété d'indices de défaut d'impression permettant d'analyser la mire faisant intervenir un indice de gain, un indice d'irrégularité, un indice de circularité, et un indice de non-uniformité. Par ailleurs, on peut calculer les résultats de cette analyse comme valeur unique pour une représentation simple et appropriée de la qualité de l'imprimé du substrat.
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