EP 4073594 A1 20221019 - METHOD FOR ENCODING A DIGITAL HOLOGRAM, METHOD FOR ENCODING A GROUP OF DIGITAL HOLOGRAMS AND ASSOCIATED ENCODING DEVICE
Title (en)
METHOD FOR ENCODING A DIGITAL HOLOGRAM, METHOD FOR ENCODING A GROUP OF DIGITAL HOLOGRAMS AND ASSOCIATED ENCODING DEVICE
Title (de)
VERFAHREN ZUR CODIERUNG EINES DIGITALEN HOLOGRAMMS, VERFAHREN ZUR CODIERUNG EINER GRUPPE VON DIGITALEN HOLOGRAMMEN UND ZUGEHÖRIGE CODIERVORRICHTUNG
Title (fr)
PROCÉDÉ DE CODAGE D'UN HOLOGRAMME NUMÉRIQUE, PROCÉDÉ DE CODAGE D'UN GROUPE D'HOLOGRAMMES NUMÉRIQUES ET DISPOSITIF DE CODAGE ASSOCIÉ
Publication
Application
Priority
- FR 1914334 A 20191213
- EP 2020084547 W 20201203
Abstract (en)
[origin: WO2021115935A1] A method for encoding a digital hologram represented by values associated respectively with pixels in a plane defining the digital hologram, comprises the following steps: - forming (E4) matrix blocks (Bi, j) associated respectively with regions composed of contiguous pixels, each matrix block (Bi, j) containing elements determined as a function of the values of the pixels in the region associated with the matrix block in question (Bi, j); - applying (E6) a space-to-frequency transformation to each of the matrix blocks (Bi, j) so as to produce, for each matrix block (Bi, j), a set (Ci, j) of coefficients that correspond respectively to different two-dimensional spatial frequencies within the matrix block in question (Bi, j); - constructing (E8) a plurality of two-dimensional structures (Sp, q) each comprising coefficients from a plurality of sets (Ci, j) of coefficients and associated with two-dimensional spatial frequencies meeting a criteria that is dependent on the two-dimensional structure in question (Sp, q); - encoding the two-dimensional structures (Sp, q) that have been constructed. A method for encoding a group of digital holograms and an encoding device are also described.
IPC 8 full level
G03H 1/08 (2006.01); G03H 1/02 (2006.01); G06T 9/00 (2006.01); H04N 19/00 (2014.01); H04N 19/597 (2014.01)
CPC (source: EP KR US)
G03H 1/08 (2013.01 - EP KR US); G06T 9/001 (2013.01 - EP KR US); G06T 9/007 (2013.01 - EP KR); H04N 19/167 (2014.11 - US); H04N 19/176 (2014.11 - US); H04N 19/597 (2014.11 - EP KR); H04N 19/61 (2014.11 - KR); H04N 19/625 (2014.11 - KR); G03H 2001/0228 (2013.01 - EP KR); H04N 19/61 (2014.11 - EP); H04N 19/625 (2014.11 - EP)
Citation (search report)
See references of WO 2021115935A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2021115935 A1 20210617; CN 114787720 A 20220722; EP 4073594 A1 20221019; FR 3104747 A1 20210618; FR 3104747 B1 20230127; JP 2023505905 A 20230213; KR 20220113975 A 20220817; US 2023004120 A1 20230105
DOCDB simple family (application)
EP 2020084547 W 20201203; CN 202080086293 A 20201203; EP 20816229 A 20201203; FR 1914334 A 20191213; JP 2022535850 A 20201203; KR 20227022292 A 20201203; US 202017784009 A 20201203