EP 1020083 A1 20000719 - METHOD FOR CONTROLLING THE COMPRESSION RATE OF DIGITAL IMAGES
Title (en)
METHOD FOR CONTROLLING THE COMPRESSION RATE OF DIGITAL IMAGES
Title (de)
VERFAHREN ZUR KONTROLLE DES KOMPRESSIONSVERHÄLTNISSES VON NUMERISCHEN BILDERN
Title (fr)
PROCEDE DE CONTROLE DU TAUX DE COMPRESSION D'IMAGES NUMERIQUES
Publication
Application
Priority
- CH 9800413 W 19980928
- FR 9712562 A 19971001
Abstract (en)
[origin: FR2769161A1] In the Joint Photographic Expert Group Compression system, some parts of the picture are compressed and others are not. The process uses an approximation to the compression factor curve with a scale factor input to set the compression factor required.
IPC 1-7
IPC 8 full level
G06T 9/00 (2006.01); H03M 7/30 (2006.01); H04N 1/41 (2006.01); H04N 7/26 (2006.01); H04N 7/30 (2006.01)
CPC (source: EP KR US)
G06T 9/00 (2013.01 - KR); H04N 19/126 (2014.11 - EP US); H04N 19/152 (2014.11 - EP US); H04N 19/176 (2014.11 - EP US); H04N 19/192 (2014.11 - EP US); H04N 19/60 (2014.11 - EP US); H04N 19/146 (2014.11 - EP US)
Citation (search report)
See references of WO 9918734A1
Designated contracting state (EPC)
CH DE FR GB IT LI NL
DOCDB simple family (publication)
FR 2769161 A1 19990402; FR 2769161 B1 19991224; AU 9150498 A 19990427; CN 1134169 C 20040107; CN 1280745 A 20010117; EP 1020083 A1 20000719; JP 2001519631 A 20011023; KR 100503666 B1 20050726; KR 20010024343 A 20010326; US 6668089 B1 20031223; WO 9918734 A1 19990415
DOCDB simple family (application)
FR 9712562 A 19971001; AU 9150498 A 19980928; CH 9800413 W 19980928; CN 98811728 A 19980928; EP 98943619 A 19980928; JP 2000515393 A 19980928; KR 20007003423 A 20000330; US 50966500 A 20000714