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    METHODS AND APPARATUSES FOR ENCODING AND DECODING DIGITAL LIGHT FIELD IMAGES
    1.
    发明申请
    METHODS AND APPARATUSES FOR ENCODING AND DECODING DIGITAL LIGHT FIELD IMAGES 审中-公开

    公开(公告)号：WO2018207059A1

    公开(公告)日：2018-11-15

    申请号：PCT/IB2018/053070

    申请日：2018-05-03

    Applicant: SISVEL TECHNOLOGY S.R.L.

    Inventor： CHAO, Yung-Hsuan ,  CHEUNG, Gene ,  ORTEGA, Antonio

    IPC: H04N19/10 ,  H04N13/161 ,  H04N13/229 ,  H04N13/232 ,  H04N13/00

    Abstract: A method for encoding a raw lenselet image (f), comprising a receiving phase (705), wherein at least a portion of a raw lenselet image (f) is received, said image (f) comprising a plurality of macro-pixels (650, 1320, 1340), each macro-pixel (650, 1320, 1340) comprising pixels corresponding to a specific view angle for the same point of a scene and an output phase, wherein a bitstream (f d ^) comprising at least a portion of an encoded lenselet image (f) is outputted. The method comprises an image transform phase (710), wherein the pixels of said raw lenselet image (f) are spatially displaced in a transformed multi-color image (660) having a larger number of columns and rows with respect to the received raw lenselet image, wherein dummy pixels (610, 620) having undefined value are inserted into said raw lenselet image (f) and wherein said displacement is performed so as to put the estimated center location of each macro-pixel (650, 1320, 1340) onto integer pixel locations. Moreover, the method comprises a sub-view generation phase, wherein a sequence of sub-views (f d ') is generated, said sub-views (1310, 1510, 1620) comprising pixels of the same angular coordinates extracted from different macro-pixels (650,1320,1340) of said transformed raw lenselet image (f). Finally, the method comprises a graph coding phase, wherein a bitstream (f d ^) is generated by encoding a graph representation of at least one of the sub-views (1310, 1510, 1620) of said sequence (f d ' ) according to a predefined graph signal processing (GSP) technique. The method comprises outputting said graph-coded bitstream (f d ^) for its transmission and/or storage.

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