公开(公告)号：US20220398356A1

公开(公告)日：2022-12-15

申请号：US17805406

申请日：2022-06-03

Applicant: DASSAULT SYSTEMES

Inventor： Lucas BRIFAULT ,  Ariane JOURDAN ,  Serban Alexandru STATE

IPC: G06F30/17

Abstract: A computed-implemented method for processing a computer-aided design 3D model of a mechanical part including a portion having a distribution of material. The method including obtaining the 3D model, the 3D model including a skin portion of the 3D model representing an outer surface of the portion of the mechanical part. The method further including processing the skin portion based on an extrusion-processing algorithm, where a transform of the skin portion is inputted to the algorithm. The transform represents an unfolding of the distribution of material of the portion.

公开(公告)号：US20200211279A1

公开(公告)日：2020-07-02

申请号：US16730795

申请日：2019-12-30

Applicant: DASSAULT SYSTEMES

Inventor： Guillaume RANDON ,  Serban Alexandru STATE ,  Fernando Manuel SANCHEZ BERMUDEZ

IPC: G06T17/10

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：US20230085000A1

公开(公告)日：2023-03-16

申请号：US17900638

申请日：2022-08-31

Applicant: DASSAULT SYSTEMES

Inventor： Lucas BRIFAULT ,  Serban Alexandru STATE

IPC: G06F30/10

Abstract: A computer-implemented method for CAD volume extrusion operator detection in a CAD 3D model representing a mechanical part. The method includes obtaining a segmentation of the CAD 3D model. The CAD 3D model includes a skin representing an outer surface of the mechanical part. The segmentation comprises segments each representing a skin portion. The method further includes iteratively grouping segments. Segments of a pair are grouped when: each segment of the pair is an extrusion surface and a union of the segments is an extrusion surface having a same extrusion axis as the segments, or each segment of the pair is an extrusion surface and one of the two segments is a closing plane for the other segment. The method further includes determining one or more CAD volume extrusion operators, each corresponding to a respective group.

公开(公告)号：US20230036219A1

公开(公告)日：2023-02-02

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 ,  G06F30/17 ,  G06T5/00

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：US20210201571A1

公开(公告)日：2021-07-01

申请号：US17139121

申请日：2020-12-31

Applicant: DASSAULT SYSTEMES

Inventor： Serban Alexandru STATE ,  Eloi MEHR ,  Yoan SOUTY

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

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.