Application of displacement maps to 3d mesh models

Patent metadata

Field	Value
Publication number	US-2022343582-A1
Application number	US-202117236905-A
Country	US
Kind code	A1
Filing date	Apr 21, 2021
Priority date	Apr 21, 2021
Publication date	Oct 27, 2022
Grant date	—

Abstract

According to examples, machine-readable instructions may cause a processor to obtain a 3D mesh model of a part and to obtain a displacement map that defines amounts of displacements to be applied to various points in the 3D mesh model, in which the displacement map is at a first resolution. The processor may also generate a lower resolution version of the displacement map, in which the lower resolution is lower than the first resolution. The processor may further apply the lower resolution version of the displacement map on the 3D mesh model to generate an updated 3D mesh model.

First claim

1 . A non-transitory computer-readable medium storing machine-readable instructions that when executed by a processor, cause the processor to:
obtain a three-dimensional (3D) mesh model of a 3D part; obtain a displacement map that defines amounts of displacements to be applied to the 3D mesh model to add texture to a surface of the 3D mesh model, wherein the displacement map has a first resolution that is higher than a resolution corresponding to a system resolution at which a 3D fabrication system is to fabricate the 3 part; generate a lower resolution version of the displacement map, wherein the lower resolution version has a predefined resolution that is lower than the first resolution of the displacement map and corresponds to a resolution that matches the system resolution at which the 3D fabrication system is to fabricate the 3D part, and wherein, at the predefined resolution of the lower resolution version, a size of a texel of the lower resolution version matches a size of an area unit corresponding to a voxel of the 3D mesh model for the 3D fabrication system; and apply the lower resolution version of the displacement map on the 3D mesh model to generate an updated 3D mesh model, wherein the 3D fabrication system is to use the updated 3D mesh model to fabricate the 3D part.

2 . The non-transitory computer-readable medium of claim 1 , wherein, to generate the lower resolution version of the displacement map, the instructions further cause the processor to:
generate a plurality of lower resolution versions of the displacement map; and select one of the plurality of lower resolution versions of the displacement map to be the lower resolution version that has the predefined resolution corresponding to a resolution that matches the system resolution.

3 . The non-transitory computer-readable medium of claim 1 , wherein the instructions further cause the processor to:
generate the lower resolution version of the displacement map by mipmapping the displacement map.

4 . The non-transitory computer-readable medium of claim 1 , wherein the instructions further cause the processor to:
generate the lower resolution version of the displacement map by iteratively mipmapping the displacement map until the lower resolution version reaches the predefined resolution.

5 . The non-transitory computer-readable medium of claim 1 , wherein the instructions further cause the processor to:
generate the lower resolution version of the displacement map by anisotropically mipmapping the displacement map to cause the lower resolution version of the displacement map to reach the predefined resolution.

6 . (canceled)

7 . The non-transitory computer-readable medium of claim 1 , wherein the 3D mesh model comprises a 3D triangle mesh model and wherein the instructions further cause the processor to:
apply the lower resolution version of the displacement map on the 3D triangle mesh model to add triangles corresponding to the displacements defined in the lower resolution version of the displacement map to a surface of the 3D triangle mesh model.

8 . The non-transitory computer-readable medium of claim 1 , wherein the instructions further cause the processor to:
voxelize the updated 3D mesh model, wherein the 3D fabrication system is to fabricate the 3D part based on the voxelized updated 3D mesh model.

9 . A method comprising:
obtaining, by a processor, a three-dimensional (3D) mesh model of a 3D part; obtaining, by the processor, a displacement map that defines amounts of displacements to the 3D mesh model to add texture to a surface of the 3D mesh model, wherein the displacement map has a first resolution that is higher than a resolution corresponding to a system resolution at which a 3D fabrication system is to fabricate the 3 part; generating, by the processor, a lower resolution version of the displacement map, wherein the lower resolution version has a predefined resolution that is lower than the first resolution of the displacement map and corresponds to a resolution that matches the system resolution at which the 3D fabrication system is to fabricate the 3D part, and wherein, at the predefined resolution of the lower resolution version, a size of a texel of the lower resolution version matches a size of an area unit corresponding to a voxel of the 3D mesh model for the 3D fabrication system; and applying, by the processor, the lower resolution version of the displacement map on the 3D mesh model to generate an updated 3D mesh model, wherein the 3D fabrication system is to use the updated 3D mesh model to fabricate the 3D part.

10 . The method of claim 9 , wherein generating the lower resolution version of the displacement map comprises:
generating a plurality of lower resolution versions of the displacement map; and selecting one of the plurality of lower resolution versions of the displacement map to be the lower resolution version that has the predefined resolution corresponding to a resolution that matches the system resolution.

11 . The method of claim 9 , wherein generating the lower resolution version of the displacement map further comprises:
generating the lower resolution version of the displacement map by anisotropically mipmapping the displacement map to cause the lower resolution version of the displacement map to reach the predefined resolution.

12 . The method of claim 9 , wherein the 3D mesh model comprises a 3D triangle mesh model and wherein the method further comprises:
applying the lower resolution version of the displacement map on the 3D triangle mesh model to add triangles corresponding to the displacements defined in the lower resolution version of the displacement map to a surface of the 3D triangle mesh model.

13 . (canceled)

14 . An apparatus comprising:
a processor, and a memory storing instructions that when executed by the processor, cause the processor to:
obtain a three-dimensional (3D) mesh model of a 3D part;
obtain a displacement map that defines amounts of displacements to be applied to the 3D mesh model to add texture to a surface of the 3D mesh model, wherein the displacement map has a first resolution that is higher than a resolution corresponding to a system resolution at which a 3D fabrication system is to fabricate the 3D part;
generate a lower resolution version of the displacement map, wherein the lower resolution version has a predefined resolution that is lower than the first resolution of the displacement map and corresponds to a resolution that matches the system resolution at which the 3D fabrication system is to fabricate the 3D part, and wherein, at the predefined resolution of the lower resolution version, a size of a texel of the lower resolution version matches a size of an area unit corresponding to a voxel of the 3D mesh model for the 3D fabrication system; and
apply the lower resolution version of the displacement map on the 3D mesh model to generate an updated 3D mesh model, wherein the 3D fabrication system is to use the updated 3D mesh model to fabricate the 3D part.

15 . The apparatus of claim 14 , wherein to generate the lower resolution version of the displacement map, the instructions cause the processor to:
generate the lower resolution version of the displacement map by anisotropically mipmapping the displacement map to cause the lower resolution version of the displacement map to reach the predefined resolution.

Assignees

• Hewlett Packard Development Co

Inventors

• Anton Dominguez Víctor
• Ballesteros Brandão Joao Hugo
• Chica Calaf Antonio
• Martín Garcia Pol
• Kazatzis Konstantinos
• Vinacua Pla Àlvaro
• Giralt I Garcia Oriol
• Carruesco Llorens Alex
• González Martin Sergio
• González Rogel Jordi

Classifications

• G06T17/20

  Finite element generation, e.g. wire-frame surface description, {tesselation} · CPC title

• G06T2210/36

  Level of detail · CPC title

• B33Y50/00 Primary

  Data acquisition or data processing for additive manufacturing · CPC title

• G06T15/04 Primary

  Texture mapping · CPC title

• G06F30/23

  using finite element methods [FEM] or finite difference methods [FDM] · CPC title