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    A METHOD AND APPARATUS FOR DEPTH ENCODING AND DECODING
    4.
    发明公开
    A METHOD AND APPARATUS FOR DEPTH ENCODING AND DECODING 审中-公开

    公开(公告)号：EP3713237A1

    公开(公告)日：2020-09-23

    申请号：EP19305338.6

    申请日：2019-03-20

    申请人： InterDigital VC Holdings, Inc.

    发明人： FLEUREAU, Julien ,  DORE, Renaud ,  THUDOR, Franck

    IPC分类号： H04N19/597 ,  H04N19/70

    摘要： Methods, device and data stream format are disclosed in the present document for the encoding, the formatting and the decoding of depth information representative of a 3D scene. Compression and decompression of quantized values by a video codec leads to a value error. This error on values is particularly sensitive for depth encoding. The present invention proposes to encode and decode depth with a quantization function that minimize an angle error when a value error on quantized depth creates a location delta between the projected point and the de-projected point. The inverse of such a quantization function has to be encoded in metadata associated with the 3D scene, for example as a LUT, to be retrieved at the decoding, as such functions are not tractable.

    A METHOD AND APPARATUS FOR ENCODING AN RENDERING A 3D SCENE WITH INPAINTING PATCHES
    6.
    发明公开
    A METHOD AND APPARATUS FOR ENCODING AN RENDERING A 3D SCENE WITH INPAINTING PATCHES 审中-公开

    公开(公告)号：EP3709651A1

    公开(公告)日：2020-09-16

    申请号：EP19305306.3

    申请日：2019-03-14

    申请人： InterDigital VC Holdings, Inc.

    发明人： CHUPEAU, Bertrand ,  FLEUREAU, Julien ,  THUDOR, Franck

    IPC分类号： H04N19/597 ,  H04N19/46 ,  H04N13/106 ,  G06T5/00

    摘要： Methods, devices and stream are disclosed for encoding, transporting and decoding a 3D scene prepared to be viewed from the inside of a viewing zone. A central view comprising texture and depth information is encoded by projected points of the 3D scene visible from a central point of view onto an image plane. Patches are generated to encode small parts of the 3D scene not visible from the central point of view. At the rendering, a viewport image is generated for the current point of view. Holes, that is dis-occluded areas, of the viewport are filled using a patch based inpainting algorithm adapted to take the patches, warped according to the rotation and translation between virtual camera used for capturing the patch and the current virtual camera.

    A METHOD AND APPARATUS FOR DECODING THREE-DIMENSIONAL SCENES
    9.
    发明公开
    A METHOD AND APPARATUS FOR DECODING THREE-DIMENSIONAL SCENES 审中-公开

    公开(公告)号：EP3745357A1

    公开(公告)日：2020-12-02

    申请号：EP19305676.9

    申请日：2019-05-28

    申请人： InterDigital VC Holdings, Inc.

    发明人： FLEUREAU, Julien ,  DORE, Renaud ,  BRIAND, Gérard

    IPC分类号： G06T15/20 ,  G06T17/00

    摘要： A method for generating an image from a source image encoding a projection of a part of a three-dimensional scene is disclosed. Pixels of a source image comprise a depth and a color attribute. Pixels of a source image are de-projected as colored point cloud. A de-projected point in a 3D space has the color attribute of the pixel that it has been de-projected from. In addition, a score is attributed to the generated point according to a local depth gradient and/or a local color gradient of the pixel it comes from, the lower the gradient, the higher the score. In a second step, the generated point cloud is captured by a virtual camera for rendering on a display device. The point cloud is projected onto the viewport image by blending color of points projected on a same pixel, the blending being weighted by the scores of these points.