公开(公告)号：US20240127465A1

公开(公告)日：2024-04-18

申请号：US18483989

申请日：2023-10-10

Applicant: FONDATION B-COM

Inventor： Nabil MADALI ,  Antonin GILLES ,  Patrick GIOIA ,  Luce MORIN

IPC: G06T7/50 ,  G03H1/22 ,  G06T5/10

CPC classification number: G06T7/50 ,  G03H1/22 ,  G06T5/10 ,  G06T2207/20052

Abstract: Disclosed is a method, implemented by a calculation unit, for estimating a depth map from a digital hologram representing a scene, the method including: reconstructing, using the digital hologram, of n images of the scene, each associated with a depth of the scene and including multiple pixels, each image being defined by a same window; for each image, forming thumbnails composed of contiguous pixels and associated with two-dimensional regions of the window; applying an operator to each thumbnail of each image associated with a depth to provide a metric per thumbnail and by depth; determining a depth associated with each region two-dimensional based at least on the metrics relating to the thumbnails associated with the two-dimensional region concerned; determining the depth of a pixel of the depth map by selecting the depth having a maximum repetition number in the two-dimensional regions including the pixel concerned.

公开(公告)号：US20240153118A1

公开(公告)日：2024-05-09

申请号：US18499924

申请日：2023-11-01

Applicant: FONDATION B-COM

Inventor： Nabil MADALI ,  Antonin GILLES ,  Patrick GIOIA ,  Luce MORIN

IPC: G06T7/55 ,  G06T17/00

CPC classification number: G06T7/55 ,  G06T17/00 ,  G06T2207/20081 ,  G06T2207/20084

Abstract: A method for estimating a depth map associated with a hologram representing a scene, the method includes steps of: reconstruction of images of the scene, each image being associated with a depth; decomposition of each image into a plurality of thumbnails adjacent to each other, each thumbnail being associated with the depth and including a plurality of pixels; determination, for each thumbnail, of a focus map by supplying, at the input of a network of neurons, values associated with the pixels of the thumbnail, to obtain, at the output of the network, the focus map including a focus level associated with the pixel concerned; and determination of a depth value, for each point of a depth map, as a function of the focus levels obtained. The invention also relates to an estimation device and an associated computer program.

公开(公告)号：US20220141475A1

公开(公告)日：2022-05-05

申请号：US17427526

申请日：2020-01-24

Applicant: FONDATION B-COM

Inventor： Glenn HERROU ,  Wassim HAMIDOUCHE ,  Luce MORIN ,  Jean-Yves AUBIE

IPC: H04N19/33 ,  H04N19/176 ,  H04N19/119 ,  H04N19/147 ,  H04N19/105 ,  H04N19/139 ,  H04N19/132

Abstract: Disclosed is a method for encoding data corresponding to a video sequence, into a spatial resolution scalable binary flow, including a base layer and enhancement layer. The method includes, for a frame of the sequence: obtaining, from the frame, a first frame, partitioning the first frame into blocks, each block having a given size, and encoding a block of the first frame to generate the base layer; obtaining, from the frame, a second frame; partitioning the second frame into blocks by inferring the initial size of a block from the size of a corresponding block in the first frame, the block of the second frame having an initial spatial resolution; determining a spatial encoding resolution associated with the block from a set of predetermined spatial resolutions; and coding data representative of the at block, based on the determined spatial encoding resolution, to generate an enhancement layer.