EP 1066716 A1 20010110 - HALFTONING WITH PRE-COMPUTED MAPS
Title (en)
HALFTONING WITH PRE-COMPUTED MAPS
Title (de)
HALBTONRASTERUNG MIT VORAUSBERECHNETEN ABBILDUNGEN
Title (fr)
CREATION DE DEMI-TONS AVEC DES CARTES ETABLIES PAR DES CALCULS PRELIMINAIRES
Publication
Application
Priority
- SE 9900282 W 19990301
- SE 9800686 A 19980305
Abstract (en)
[origin: WO9945697A1] Halftoning method based on the use of pre-computed maps, one for each possible tone value in the image, at halftoning the image value at a specific position gives the map from which a pixel is copied into the halftone at the corresponding position. The maps with low or high densities have maximally spread minority dots but in intermediate maps a successive transition takes place from maximally spread dots to structured dot clusters of defined type for instance straight lines.
IPC 1-7
IPC 8 full level
H04N 1/405 (2006.01)
CPC (source: EP)
H04N 1/4051 (2013.01)
Citation (search report)
See references of WO 9945697A1
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
WO 9945697 A1 19990910; EP 1066716 A1 20010110; SE 513365 C2 20000904; SE 9800686 D0 19980305; SE 9800686 L 19990906
DOCDB simple family (application)
SE 9900282 W 19990301; EP 99908033 A 19990301; SE 9800686 A 19980305