公开(公告)号：US20220210457A1

公开(公告)日：2022-06-30

申请号：US17700284

申请日：2022-03-21

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： SEBASTIEN LASSERRE ,  Fabrice Leleannec ,  Yannick Olivier

IPC: H04N19/44 ,  H04N19/30 ,  H04N19/136 ,  H04N19/186 ,  H04N19/126 ,  H04N19/98

Abstract: The present disclosure generally relates to a device and a method of decoding a color picture from a bitstream. It comprises: obtaining an expanded range luminance as a first component by applying a nonlinear dynamic expansion function to a luminance component obtained from the bitstream, wherein said nonlinear dynamic expansion function is determined depending on an inverse of a dynamic reduction function that has been applied to an original luminance component obtained when encoding the color picture; obtaining a second component by calculating a square root of a difference between a value determined by the first component and another value computed as a linear combination of a multiplication product of two chrominance components and square values of the two chrominance components obtained from the bitstream, and obtaining at least one color component of the color picture to be decoded at least from said second component and said two chrominance components by determining said at least one color component as a linear combination of the second component and the two chrominance components.

公开(公告)号：US12067695B2

公开(公告)日：2024-08-20

申请号：US18132939

申请日：2023-04-10

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Julien Ricard ,  Celine Guede ,  Jean-Claude Chevet ,  David Gendron ,  Yannick Olivier ,  Joan Llach

IPC: G06T3/4007 ,  G06T3/06 ,  G06T9/00

CPC classification number: G06T3/4007 ,  G06T3/06 ,  G06T9/001

Abstract: The present embodiments relate to a method and device. The method comprises obtaining at least one first point from at least one point of a point cloud by projecting said point of the point cloud onto a projection plane and obtaining at least one other point of the point cloud determined according to said at least one first point; determining and encoding at least one interpolation coding mode for said at least one first point based on at least one reconstructed point obtained from said at least one first point and at least one interpolation point defined by said at least one interpolation coding mode to approximate said at least one other point of the point cloud; and signaling said at least interpolation coding mode as values of image data.

公开(公告)号：US11989855B2

公开(公告)日：2024-05-21

申请号：US16768282

申请日：2018-11-30

Applicant: InterDigital VC Holdings, Inc.

Inventor： Francois Cellier ,  Yannick Olivier ,  Marie-Jean Colaitis ,  David Touze

IPC: G06T5/00 ,  G06T5/50

CPC classification number: G06T5/009 ,  G06T5/50 ,  G06T2207/10024 ,  G06T2207/20024 ,  G06T2207/20208

Abstract: A system and method is provided for generating a tone mapping function to reduce dynamic range of a first image to produce a second image. A luma signal and a plurality of chroma components are determined and a gamut color correction is then performed. An adaptive function is generated by comparing the luma signal and at least one chroma component of the first and second image.

公开(公告)号：US11915456B2

公开(公告)日：2024-02-27

申请号：US17282555

申请日：2019-10-04

Applicant: InterDigital VC Holdings, Inc.

Inventor： Yannick Olivier ,  Jean-Claude Chevet ,  Joan Llach

IPC: G06T9/00 ,  G06T7/10

CPC classification number: G06T9/001 ,  G06T7/10 ,  G06T2207/20021

Abstract: A method and apparatus of encoding/decoding attributes of points of a pint cloud are provided. The encoding method subdivides a bounding box bounding the points to be encoded, encodes data representative of attributes of a point by referring to a subdivision to which said point belongs to; and encode data representative of a number of points comprised in each subdivision.

公开(公告)号：US11900639B2

公开(公告)日：2024-02-13

申请号：US16962908

申请日：2019-01-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Celine Guede ,  Yannick Olivier ,  Joan Llach Pinsach ,  David Gendron

IPC: G06K9/36 ,  G06T9/00 ,  H04N19/184 ,  H04N19/186

CPC classification number: G06T9/00 ,  H04N19/184 ,  H04N19/186

Abstract: At least one embodiment relates to a method for adding at least one 3D sample to a point cloud frame and for assigning a color-coding mode to said at least one 3D sample, said color-coding mode indicating if color information associated with said at least one 3D sample is explicitly encoded in a bitstream or if said color information is implicit.

公开(公告)号：US11756234B2

公开(公告)日：2023-09-12

申请号：US17046653

申请日：2019-04-09

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Celine Guede ,  Yannick Olivier ,  Joan Llach Pinsach

IPC: G06T9/00

CPC classification number: G06T9/001

Abstract: At least one embodiment relates to a method comprising encoding a projection mode associated with an image region of a first depth image, said projection mode indicating if said image region stores either the minimum or the maximum depth value of at least one orthogonally projected 3D point of the point cloud along a same projection direction; and encoding said depth minimum and maximum depth values as a function of said projection mode.

公开(公告)号：US11024017B2

公开(公告)日：2021-06-01

申请号：US16205505

申请日：2018-11-30

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Francois Cellier ,  Patrick Lopez ,  Yannick Olivier ,  David Touze

IPC: G06K9/00 ,  G06T5/00 ,  G06T5/20

Abstract: A system and methods is provided for performing, by a processor, an initial tone mapping function on a first image to produce a second image. The first and second images are of different dynamic ranges. The method also includes applying, by the processor, a second tone mapping function to the second image when it contains any saturated portions. The second tone mapping function lowers luminance by a first fraction. The overall luminance of the second image is also determined and a fine tuning filter is applied when at least portions of said second image contain areas darker than an amount.

公开(公告)号：US10708620B2

公开(公告)日：2020-07-07

申请号：US16165159

申请日：2018-10-19

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yannick Olivier ,  David Touze ,  Philippe Bordes ,  Franck Hiron

IPC: H04N19/597 ,  H04N19/30 ,  H04N19/61 ,  H04N19/59 ,  H04N19/36 ,  H04N19/50

Abstract: The inventors realized that representing HDR content using LDR content and HDR residual is not unproblematic. The invention therefore proposes representing HDR content using LDR content, LDR residual and global illumination data, instead.That is, it is proposed a method of encoding an HDR video of high dynamic range together with an LDR video, the LDR video providing a lower dynamic range depiction of the HDR video content, the method comprising using processing means for encoding one video of the LDR video and a further LDR video extracted from the HDR video independent from the other video of the LDR video and the HDR video and predictive encoding the other video using the one video as reference, and lossless encoding global illumination data further extracted from the HDR video.This has the advantage that prediction is more stable and globally optimal predictors are more easily found.

公开(公告)号：US10600163B2

公开(公告)日：2020-03-24

申请号：US15821245

申请日：2017-11-22

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yannick Olivier ,  David Touze ,  Nicolas Caramelli ,  Pierre Andrivon

IPC: G06T5/00 ,  H04N9/73 ,  G06T5/20

Abstract: A method and device for reconstructing image data is provided that is representative of an original image data from a decoded image data and parameters obtained from a bitstream, the parameters having been processed from said original image data. The method provides a desaturating of a luma component, an inverse-mapping of desaturated luma component and a correction of chroma components. These operations are being modulated according to the value of a single modulation factor mod representative of a peak luminance of a presentation display on which the reconstructed image is intended to be displayed, a peak luminance of a particular range image and a peak luminance of the original image data or the mastering display used to grade the original image data.

公开(公告)号：US20200053373A1

公开(公告)日：2020-02-13

申请号：US16655558

申请日：2019-10-17

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： SEBASTIEN LASSERRE ,  Fabrice Leleannec ,  Yannick Olivier

IPC: H04N19/44 ,  H04N19/30 ,  H04N19/136 ,  H04N19/186 ,  H04N19/126 ,  H04N19/98

Abstract: The present disclosure generally relates to a device and a method of decoding a color picture from a bitstream. It comprises: obtaining an expanded range luminance as a first component by applying a nonlinear dynamic expansion function to a luminance component obtained from the bitstream, wherein said nonlinear dynamic expansion function is determined depending on an inverse of a dynamic reduction function that has been applied to an original luminance component obtained when encoding the color picture; obtaining a second component by calculating a square root of a difference between a value determined by the first component and another value computed as a linear combination of a multiplication product of two chrominance components and square values of the two chrominance components obtained from the bitstream, and obtaining at least one color component of the color picture to be decoded at least from said second component and said two chrominance components by determining said at least one color component as a linear combination of the second component and the two chrominance components.