EP 1634709 A1 20060315 - Printing method with camouflage of defective print elements
Title (en)
Printing method with camouflage of defective print elements
Title (de)
Druckverfahren mit Verschleierung von defekten Druckelementen
Title (fr)
méthode d'impression à dissimulation d'éléments d'impression défectueux
Publication
Application
Priority
EP 04104428 A 20040914
Abstract (en)
A printing method for a printer having a printhead with a plurality of print elements and capable of printing a binary pixel image, the method comprising the steps of: a) locating a defective print element, b) determining a camouflage area in the vicinity of pixels that would have to be printed with the defective print element and c) camouflaging defective print element by modifying image information in said camouflage area, characterised in that step c) comprises the steps of: modifying (S104; S204) a gamma correction function (42) to a modified gamma correction function (46) and using said modified gamma correction function (46) in said camouflage area.
IPC 8 full level
B41J 2/165 (2006.01); H04N 1/40 (2006.01); H04N 1/405 (2006.01)
CPC (source: EP)
B41J 2/2139 (2013.01)
Citation (applicant)
US 6215557 B1 20010410 - OWENS BRIAN KEITH [US]
Citation (search report)
- [XA] EP 1151867 A2 20011107 - CANON KK [JP]
- [DA] US 6215557 B1 20010410 - OWENS BRIAN KEITH [US]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04104428 A 20040914