EP 1350221 A2 20031008 - METHODS AND SYSTEMS FOR IMPROVING DISPLAY RESOLUTION IN IMAGES USING SUB-PIXEL SAMPLING AND VISUAL ERROR FILTERING
Title (en)
METHODS AND SYSTEMS FOR IMPROVING DISPLAY RESOLUTION IN IMAGES USING SUB-PIXEL SAMPLING AND VISUAL ERROR FILTERING
Title (de)
VERBESSERTES AUFLÖSUNGSVERMÖGEN VON BILDERN MITTELS SUBPIXELABTASTUNG UND VISUELLER FEHLERFILTERUNG
Title (fr)
PROCEDES ET SYSTEMES PERMETTANT D'AMELIORER LA RESOLUTION DES IMAGES SUR UN AFFICHAGE AU MOYEN D'UN ECHANTILLONNAGE SOUS-PIXEL ET D'UN FILTRAGE DES ERREURS VISIBLES
Publication
Application
Priority
- JP 0110915 W 20011212
- US 73542400 A 20001212
- US 73545400 A 20001212
- US 73542500 A 20001212
Abstract (en)
[origin: WO0248960A2] The present invention provides a method and an apparatus for converting a color image of a higher-resolution to an image of a lower-resolution. With the method of the present invention, based on characteristics of spatial frequency responses of the human visual system, a lower-resolution image (116) is formed by separating a higher-resolution image (72) into a luminance channel (76) and chrominance channels (98 & 100) so as to carry out suitable sampling and filtering for each of the luminance channel (76) and the chrominance channels (98 & 100), then by combing the luminance channel (86) and the chrominance channels (111 & 114) after the sampling. As to the chrominance channels (98 & 100), traditional sub-sampling (101 & 103) is carried out to avoid chromatic aliasing, while sub-pixel sampling (80) is performed for the luminance channel (76) to improve resolution of luminance component.
IPC 1-7
IPC 8 full level
G06T 1/00 (2006.01); G06T 3/40 (2006.01); G06T 5/20 (2006.01); G09G 5/02 (2006.01); G09G 5/395 (2006.01); H04N 1/387 (2006.01); H04N 1/46 (2006.01); H04N 9/00 (2006.01); G09G 3/20 (2006.01)
CPC (source: EP)
G06T 3/4015 (2013.01); G09G 5/02 (2013.01); G09G 5/395 (2013.01); G09G 3/2059 (2013.01); G09G 3/2074 (2013.01); G09G 2320/02 (2013.01); G09G 2340/0407 (2013.01); G09G 2340/0414 (2013.01); G09G 2340/0421 (2013.01); G09G 2340/0428 (2013.01); G09G 2340/0457 (2013.01)
Citation (search report)
See references of WO 0248960A2
Designated contracting state (EPC)
AT BE CH CY DE FR GB IT LI
DOCDB simple family (publication)
WO 0248960 A2 20020620; WO 0248960 A3 20030724; CN 1267882 C 20060802; CN 1489760 A 20040414; EP 1350221 A2 20031008; JP 2004524729 A 20040812; TW 558899 B 20031021
DOCDB simple family (application)
JP 0110915 W 20011212; CN 01822601 A 20011212; EP 01270858 A 20011212; JP 2002550598 A 20011212; TW 90130880 A 20011212