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1. WO2018153802 - METHOD AND DEVICE FOR RECONSTRUCTING AN HDR IMAGE

Publication Number WO/2018/153802
Publication Date 30.08.2018
International Application No. PCT/EP2018/053987
International Filing Date 19.02.2018
IPC
H04N 1/60 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
46Colour picture communication systems
56Processing of colour picture signals
60Colour correction or control
G06T 5/00 2006.1
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
H04N 9/64 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
64Circuits for processing colour signals
H04N 19/00 2014.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
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 2207/20208
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
20208High dynamic range [HDR] image processing
G06T 3/40
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
3Geometric image transformation in the plane of the image
40Scaling the whole image or part thereof
G06T 5/007
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
007Dynamic range modification
G06T 5/009
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
007Dynamic range modification
009Global, i.e. based on properties of the image as a whole
G06T 5/50
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
50by the use of more than one image, e.g. averaging, subtraction
Applicants
  • INTERDIGITAL VC HOLDINGS, INC. [US]/[US]
Inventors
  • OLIVIER, Yannick
  • FRANCOIS, Edouard
  • ANDRIVON, Pierre
  • TOUZE, David
Agents
  • LABELLE, Lilian
Priority Data
17305207.724.02.2017EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND DEVICE FOR RECONSTRUCTING AN HDR IMAGE
(FR) PROCÉDÉ ET DISPOSITIF DE RECONSTRUCTION D'IMAGE HDR
Abstract
(EN) The present principles relates to a method and device for reconstructing an High-Dynamic-Range image represented by one reconstructed High- Dynamic-Range luma component (Ŷ' ) and two reconstructed High-Dynamic- Range chroma components (Û', (I)) from a Standard-Dynamic-Range image represented by a Standard-Dynamic-Range luma component (y', y'1) and two Standard-Dynamic-Range chroma components (u', v'). The method is characterized in that the method comprises: inverse-mapping (22) said Standard-Dynamic-Range luma component (y', y'1) to obtain said reconstructed High-Dynamic-Range luma component (Ŷ' ); and correcting (33) said two Standard-Dynamic-Range chroma components (u', v') to obtain said two reconstructed High-Dynamic-Range chroma components (Û', (I)) according to said Standard-Dynamic-Range luma component (y', y'1) and said reconstructed High-Dynamic-Range luma component (Ŷ' ).
(FR) Les principes de la présente invention concernent un procédé et un dispositif de reconstruction d'une image à grande gamme dynamique représentée par une composante de luminance à grande gamme dynamique reconstruite (Ŷ' ) et deux composantes de chrominance à grande gamme dynamique reconstruites ((Û', (I)) à partir d'une image à gamme dynamique standard représentée par une composante de luminance à gamme dynamique standard (y', y' 1 ) et deux composantes de chrominance à gamme dynamique standard (u', v'). Le procédé est caractérisé en ce qu'il comprend les étapes suivantes : effectuer le mappage inverse (22) de ladite composante de luminance à gamme dynamique standard (y', y' 1 ) pour obtenir ladite composante de luminance à grande gamme dynamique reconstruite (Ŷ' ); et corriger (33) lesdites deux composantes de chrominance à gamme dynamique standard (u', v') pour obtenir lesdites deux composantes de chrominance à grande gamme dynamique reconstruites (Û', (I)) en fonction de ladite composante de luminance à gamme dynamique standard (y', y' 1 ) et ladite composante de luminance à grande gamme dynamique reconstruite (Ŷ' ).
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