公开(公告)号：US11100710B2

公开(公告)日：2021-08-24

申请号：US16730833

申请日：2019-12-30

Applicant: DASSAULT SYSTEMES

Inventor： Guillaume Randon ,  Serban Alexandru State ,  Fernando Manuel Sanchez Bermudez

IPC: G06T17/00 ,  G06T17/20 ,  G06T7/00 ,  G06T17/10 ,  G06T19/20

Abstract: The disclosure notably relates to a computer-implemented method for extracting a feature tree from a mesh. The method includes providing a mesh, computing a geometric and adjacency graph of the provided mesh, wherein each node of the graph represents one region of the mesh and comprises a primitive type and parameters of the region, each connection between two nodes is an intersection between the respective surfaces of the regions represented by the two connected nodes. The method also includes instantiating for each node of the graph, a surface based on the identified primitive type and parameters of the region.

公开(公告)号：US11893690B2

公开(公告)日：2024-02-06

申请号：US17949823

申请日：2022-09-21

Applicant: DASSAULT SYSTEMES

Inventor： Serban Alexandru State ,  Eloi Mehr ,  Yoan Souty

IPC: G06T17/20 ,  G06F30/23 ,  G06T5/00 ,  G06F30/17

CPC classification number: G06T17/20 ,  G06F30/17 ,  G06F30/23 ,  G06T5/002

Abstract: A computer-implemented method for 3D reconstruction including obtaining 2D images and, for each 2D image, camera parameters which define a perspective projection. The 2D images all represent a same real object. The real object is fixed. The method also includes obtaining, for each 2D image, a smooth map. The smooth map has pixel values, and each pixel value represents a measurement of contour presence. The method also includes determining a 3D modeled object that represents the real object. The determining iteratively optimizes energy. The energy rewards, for each smooth map, projections of silhouette vertices of the 3D modeled object having pixel values representing a high measurement of contour presence. This forms an improved solution for 3D reconstruction.

公开(公告)号：US11790605B2

公开(公告)日：2023-10-17

申请号：US17139121

申请日：2020-12-31

Applicant: DASSAULT SYSTEMES

Inventor： Serban Alexandru State ,  Eloi Mehr ,  Yoan Souty

IPC: G06T17/20 ,  G06F30/23 ,  G06T5/00 ,  G06F30/17

CPC classification number: G06T17/20 ,  G06F30/17 ,  G06F30/23 ,  G06T5/002

Abstract: A computer-implemented method for 3D reconstruction including obtaining 2D images and, for each 2D image, camera parameters which define a perspective projection. The 2D images all represent a same real object. The real object is fixed. The method also includes obtaining, for each 2D image, a smooth map. The smooth map has pixel values, and each pixel value represents a measurement of contour presence. The method also includes determining a 3D modeled object that represents the real object. The determining iteratively optimizes energy. The energy rewards, for each smooth map, projections of silhouette vertices of the 3D modeled object having pixel values representing a high measurement of contour presence. This forms an improved solution for 3D reconstruction.

公开(公告)号：US11195330B2

公开(公告)日：2021-12-07

申请号：US16730795

申请日：2019-12-30

Applicant: DASSAULT SYSTEMES

Inventor： Guillaume Randon ,  Serban Alexandru State ,  Fernando Manuel Sanchez Bermudez

IPC: G06T17/00 ,  G06T17/10

Abstract: The disclosure notably relates to a computer-implemented method for generating a structured three-dimensional (3D) model from a mesh. The method includes obtaining a mesh that comprises faces, each face of the mesh including a normal and principal curvature values; computing a distribution of the principal curvatures values over the whole mesh by counting the number of occurrences of discretized curvature values; identifying in the computed distribution one or more dominant ranges of principal curvature values; for each identified dominant range, computing one or more regions of the mesh that includes faces belonging to the identified dominant range; for each computed region, detecting a primitive type by using the curvatures values of all faces of the region and identifying parameters of the detected primitive by using the mesh surface of the region.

公开(公告)号：US20200211281A1

公开(公告)日：2020-07-02

申请号：US16730833

申请日：2019-12-30

Applicant: Dassault Systemes

Inventor： Guillaume Randon ,  Serban Alexandru State ,  Fernando Manuel Sanchez Bermudez

IPC: G06T17/20 ,  G06T17/10 ,  G06T17/00 ,  G06T19/20 ,  G06T7/00

Abstract: The disclosure notably relates to a computer-implemented method for extracting a feature tree from a mesh. The method includes providing a mesh, computing a geometric and adjacency graph of the provided mesh, wherein each node of the graph represents one region of the mesh and comprises a primitive type and parameters of the region, each connection between two nodes is an intersection between the respective surfaces of the regions represented by the two connected nodes. The method also includes instantiating for each node of the graph, a surface based on the identified primitive type and parameters of the region.