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1. WO2000042564 - FILTERING IMAGE DATA TO OBTAIN SAMPLES MAPPED TO PIXEL SUB-COMPONENTS OF A DISPLAY DEVICE

Publication Number WO/2000/042564
Publication Date 20.07.2000
International Application No. PCT/US2000/000847
International Filing Date 12.01.2000
Chapter 2 Demand Filed 11.08.2000
IPC
G06K 9/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
G06K 9/40 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
36Image preprocessing, i.e. processing the image information without deciding about the identity of the image
40Noise filtering
G06T 1/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
1General purpose image data processing
G06T 5/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
G06T 5/20 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
20by the use of local operators
G06T 7/40 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
40Analysis of texture
CPC
G09G 2320/0242
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
0242Compensation of deficiencies in the appearance of colours
G09G 2320/0276
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
0271Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
0276for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
G09G 2340/0457
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2340Aspects of display data processing
04Changes in size, position or resolution of an image
0457Improvement of perceived resolution by subpixel rendering
G09G 5/005
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
003Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
005Adapting incoming signals to the display format of the display terminal
G09G 5/006
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
003Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
006Details of the interface to the display terminal
Applicants
  • MICROSOFT CORPORATION [US/US]; One Microsoft Way Redmond, WA 98052, US
Inventors
  • PLATT, John, C.; US
  • MITCHELL, Donald, P.; US
  • WHITTED, J., Turner; US
  • BLINN, James, F.; US
Agents
  • NYDEGGER, Rick, D. ; Workman, Nydegger & Seeley 60 East South Temple 1000 Eagle Gate Tower Salt Lake City, UT 84111, US
Priority Data
09/364,36530.07.1999US
60/115,57312.01.1999US
60/115,73112.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FILTERING IMAGE DATA TO OBTAIN SAMPLES MAPPED TO PIXEL SUB-COMPONENTS OF A DISPLAY DEVICE
(FR) FILTRAGE DES DONNEES D'IMAGE PERMETTANT D'OBTENIR DES ECHANTILLONS MAPPES AU NIVEAU DES SOUS-COMPOSANTS DE PIXELS DANS UN DISPOSITIF D'AFFICHAGE
Abstract
(EN)
Image data processing and image rendering methods and systems whereby images are displayed on display devices having pixels with separately controllable pixel sub-components. Image data (200), such as data encoded in a three-channel signal (202, 204, 206), is passed through a low-pass filter (220a, 220b, 220c) to remove frequencies higher than a selected cutoff frequency, which obtain samples (230a, 230b, 230c) from the color components of the signal (202, 204, 206) that map spatially different image regions to individual pixel sub-components (250a, 250b, 250c). It has been found that color aliasing effects can be significantly reduced at a cutoff frequency somewhat higher than the Nyquist frequency, while enhancing the spatial resolution of the image.
(FR)
L'invention concerne le traitement de données d'image et les procédés et systèmes de rendu d'image dans lesquels les images sont affichées sur des dispositifs d'affichage comportant des pixels avec des sous-composants de pixels contrôlables séparément. On fait passer des données d'image (200) telles que les données codées sous la forme d'un signal trois voies (202, 204, 206) à travers un filtre passe-bas (220a, 220b, 220c) afin d'enlever les fréquences supérieures à une fréquence de coupure sélectionnée, ce qui permet d'obtenir des échantillons (230a, 230b, 230c) à partir des composants couleur du signal (202, 204, 206) qui mappent des régions de l'image différentes au plan spatial comme des sous-composants de pixels individuels (250a, 250b, 250c). On a découvert qu'on peut réduire sensiblement les effets de crénelage des couleurs à une fréquence de coupure quelque peu plus haute que la fréquence de Nyquist, et ce tout en améliorant la résolution spatiale de l'image.
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