Processing

Please wait...

Settings

Settings

Goto Application

1. WO2006094265 - SHARPNESS FILTERING FOR PICTURE-SMOOTHING ARCHITECTURES

Publication Number WO/2006/094265
Publication Date 08.09.2006
International Application No. PCT/US2006/007840
International Filing Date 03.03.2006
IPC
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
G06K 9/38 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
38Quantising the analogue image signal
CPC
G06T 2207/10024
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2207Indexing scheme for image analysis or image enhancement
10Image acquisition modality
10024Color image
G06T 2207/20192
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2207Indexing scheme for image analysis or image enhancement
20Special algorithmic details
20172Image enhancement details
20192Edge enhancement; Edge preservation
G06T 5/003
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
001Image restoration
003Deblurring; Sharpening
G06T 5/20
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
20by the use of local operators
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 2320/0285
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
0285using tables for spatial correction of display data
Applicants
  • TEXAS INSTRUMENTS INCORPORATED [US]/[US] (AllExceptUS)
  • KEMPF, Jeffrey, M. [US]/[US] (UsOnly)
  • HUTCHISON, David, C. [US]/[US] (UsOnly)
  • SKOOG, Arnold, D. [US]/[US] (UsOnly)
Inventors
  • KEMPF, Jeffrey, M.
  • HUTCHISON, David, C.
  • SKOOG, Arnold, D.
Agents
  • FRANZ, Warren, L.
Priority Data
11/071,68903.03.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SHARPNESS FILTERING FOR PICTURE-SMOOTHING ARCHITECTURES
(FR) FILTRAGE DE NETTETE POUR ARCHITECTURES DE LISSAGE D'IMAGES
Abstract
(EN)
An image is converted from Red-Green-Blue (RGB) to Hue-Saturation- Value (HSV) color space (102) for sharpness enhancement. A finite impulse response filter is applied (at 104) to a brightness channel of the image prior to applying a picture-smoothing algorithm to the image. A local variance estimate is determined for the image. A gain of the finite impulse response filter is varied based upon the local variance estimate. The finite impulse response filter is an inverse of a filter that approximates the picture-smoothing algorithm, the enhanced image is reconverted to RGB format (106).
(FR)
Selon l'invention, une image subit une conversion entre rouge-vert-bleu (RVB) et un espace couleur teinte-saturation-valeur (TSV) (102) en vue d'une amélioration de la netteté. Un filtre à réponse impulsionnelle finie est mis en oeuvre (étape 104) sur un canal de luminosité de l'image avant l'application d'un algorithme de lissage d'image sur l'image. Une estimation de variance locale est déterminée pour l'image. Un gain du filtre à réponse impulsionnelle finie est modifié sur la base de l'estimation de variance locale. Le filtre à réponse impulsionnelle finie est l'inverse d'un filtre se rapprochant de l'algorithme de lissage d'image. L'image améliorée est reconvertie en format RVB (106).
Also published as
EP6737063
Latest bibliographic data on file with the International Bureau