UV map using weight painting

Patent metadata

Field	Value
Publication number	US-11978149-B2
Application number	US-202117304390-A
Country	US
Kind code	B2
Filing date	Jun 21, 2021
Priority date	Jun 21, 2021
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A method, computer system, and a computer program product for projecting a 3D model defined by x, y, z coordinates onto the surface of a 2D image defined by u, v coordinates is provided. The present invention may include receiving a 3D model having a plurality of polygons, wherein certain edges are marked as seams. The present invention may include receiving input from a user, wherein the input comprises painting one or more parts of the 3D model in different colors, wherein the colors correspond with a weight of the area painted. The present invention may include unwrapping, by a processor, a 2D texture from the 3D model using a projection algorithm. The present invention may include generating a rectangular boundary around each island. The present invention may include scaling each island according to a gradient score.

First claim

What is claimed is:

1. A computer-implemented method for projecting a 3D model defined by x, y, z coordinates onto the surface of a 2D image defined within a u, v coordinate plane, comprising:
receiving a 3D model having a plurality of polygons, wherein certain edges are marked as seams;
receiving input from a user, wherein the input comprises painting one or more parts of the 3D model in different colors, wherein the colors correspond with a weight of the area painted;
unwrapping, by a processor, a 2D texture from the 3D model using a projection algorithm;
generating a rectangular boundary around each island;
identifying a center of each island; and
scaling each island and the associated rectangular boundary from the identified center of each island of mass according to a gradient score until an edge of the associated rectangular boundary reaches an edge of a different rectangular boundary around another island.

2. The computer-implemented method of claim 1 , further comprising receiving input from a user, wherein the input comprises adjusting the u, v coordinates of each island.

3. The computer-implemented method of claim 1 , wherein the 3D model is received from a user in a computer software used for 3D modeling.

4. The computer-implemented method of claim 1 , wherein the projection algorithm allocates u, v space based on the weight defined by the painted color, a more important area receiving more u, v space and a less important area receiving less u, v space.

5. The computer-implemented method of claim 1 , wherein the gradient score is generated at seams of a UV model, the UV model being the 2D image in the u, v coordinate plane, wherein the weight is averaged to create a gradient at the seams at the edges of islands.

6. The computer-implemented method of claim 5 , further comprising:
partitioning the UV model into islands based on a location of seams.

7. The computer-implemented method of claim 1 , wherein scaling each island according to the gradient score is done using a fitting algorithm.

8. A computer system for projecting a 3D model defined by x, y, z coordinates onto the surface of a 2D image defined within a u, v coordinate plane, comprising:
one or more processors, one or more computer-readable memories, one or more computer-readable tangible storage medium, and program instructions stored on at least one of the one or more tangible storage medium for execution by at least one of the one or more processors via at least one of the one or more memories, wherein the computer system is capable of performing a method comprising:
receiving a 3D model having a plurality of polygons, wherein certain edges are marked as seams;
receiving input from a user, wherein the input comprises painting one or more parts of the 3D model in different colors, wherein the colors correspond with a weight of the area painted;
unwrapping, by a processor, a 2D texture from the 3D model using a projection algorithm;
generating a rectangular boundary around each island;
identifying a center of each island; and

scaling each island and the associated rectangular boundary from the identified center of mass of each island according to a gradient score until an edge of the associated rectangular boundary reaches an edge of a different rectangular boundary around another island.

9. The computer system of claim 8 , further comprising receiving input from a user, wherein the input comprises adjusting the u, v coordinates of each island.

10. The computer system of claim 8 , wherein the 3D model is received from a user in a computer software used for 3D modeling.

11. The computer system of claim 8 , wherein the projection algorithm allocates u, v space based on the weight defined by the painted color, a more important area receiving more u, v space and a less important area receiving less u, v space.

12. The computer system of claim 8 , wherein the gradient score is generated at seams of a UV model, the UV model being the 2D image in the u, v coordinate plane, wherein the weight is averaged to create a gradient at the seams at the edges of islands.

13. The computer system of claim 12 , further comprising:
partitioning the UV model into islands based on a location of seams.

14. The computer system of claim 8 , wherein scaling each island according to the gradient score is done using a fitting algorithm.

15. A computer program product for projecting a 3D model defined by x, y, z coordinates onto the surface of a 2D image defined within a u, v coordinate plane, comprising:
one or more non-transitory computer-readable tangible storage media and program instructions stored on at least one of the one or more non-transitory computer-readable tangible storage media, the program instructions executable by a processor to cause the processor to perform a method comprising:
receiving a 3D model having a plurality of polygons, wherein certain edges are marked as seams;
receiving input from a user, wherein the input comprises painting one or more parts of the 3D model in different colors, wherein the colors correspond with a weight of the area painted;
unwrapping, by a processor, a 2D texture from the 3D model using a projection algorithm;
generating a rectangular boundary around each island;
identifying a center of each island; and
scaling each island and the associated rectangular boundary from the identified center of mass of each island according to a gradient score until an edge of the associated rectangular boundary reaches an edge of a different rectangular boundary around another island.

16. The computer program product of claim 15 , further comprising receiving input from a user, wherein the input comprises adjusting the u, v coordinates of each island.

17. The computer program product of claim 15 , wherein the 3D model is received from a user in a computer software used for 3D modeling.

18. The computer program product of claim 15 , wherein the projection algorithm allocates u, v space based on the weight defined by the painted color, a more important area receiving more u, v space and a less important area receiving less u, v space.

19. The computer program product of claim 15 , wherein the gradient score is generated at seams of a UV model, the UV model being the 2D image in the u, v coordinate plane, wherein the weight is averaged to create a gradient at the seams at the edges of islands.

20. The computer program product of claim 19 , further comprising:
partitioning the UV model into islands based on a location of seams.

Assignees

• IBM
• The Weather Company Llc

Inventors

• Lu Cindy Han
• Lloyd Angela Monique
• Tran Thai Quoc
• Liu Weiwei

Classifications

• G06T11/10

  Texturing; Colouring; Generation of textures or colours (retouching, inpainting or scratch removal G06T5/77) · CPC title

• G06T15/04 Primary

  Texture mapping · CPC title

• G06T7/13

  Edge detection · CPC title

• G06T11/001

  Physics · mapped topic

• G06T11/40

  Filling planar surfaces by adding surface attributes, e.g. adding colours or textures · CPC title