WO2018209570A1

WO2018209570A1 - Device and method for inheriting vertex weight of 3d scanning model

Info

Publication number: WO2018209570A1
Application number: PCT/CN2017/084562
Authority: WO
Inventors: 王志全; 王皓棉; 曾家东; 沈西优
Original assignee: 深圳市三维人工智能科技有限公司
Priority date: 2017-05-16
Filing date: 2017-05-16
Publication date: 2018-11-22
Also published as: CN110062935B; CN110062935A

Abstract

Disclosed in the present invention are a device and method for inheriting a vertex weight of a 3D scanning model, the device comprising: an acquisition module, used for acquiring vertex weight information of a common model, wherein the common model is used for fusing with a designated part of an initial 3D scanning model so as to generate a 3D scanning model; a search module, used for searching the synthesized 3D scanning model and determining the vertices of the synthesized 3D scanning model and similar vertices among all of the vertices of the common model; and an assignment module, used for assigning the vertex weight information of vertices of the common model to similar vertices corresponding thereto in the synthesized 3D scanning model. By means of the present invention, a new 3D model generated by splicing may be controlled to implement animation demonstration of the 3D model.

Description

Vertex weight inheritance device and method for 3D scanning model

Technical field

The present invention relates to the field of 3D scanning, and in particular to a vertex weight inheritance apparatus and method for a 3D scanning model.

Background technique

With the development of computer hardware and software technology, and the enhancement of image graphics processing capabilities, 3D models have been applied to all walks of life. Conventionally, to make a live 3D model, it is usually necessary to generate a model using a 3D body scanner and then manually process it. However, the cost of manual processing is very high and cannot be generated in batches. In the prior art, the face part in the scan model is usually cut by scanning the face model, spliced to the same position of the preset public model, the edges are smoothly connected, and a complete model is synthesized to obtain the final product.

After the arbitrary specified parts are stitched together with our public model, a new 3D model is produced, but this 3D model is not bound by the modeler, so it cannot be animated by computer software control like a public model.

Summary of the invention

The technical problem to be solved by the present invention is to provide a vertex weight inheritance apparatus and method for a 3D scan model, which can control a new 3D model generated by stitching to realize an animation demonstration of a 3D model.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a vertex weight inheritance device for a 3D scan model, the device comprising: an acquisition module, configured to acquire vertex weight information of a common model; wherein, the public model is used Generating a 3D scan model with a specified portion of the original 3D scan model; a search module for finding a synthesized 3D scan model, determining similar vertices in the vertices of the synthesized 3D scan model and all common models; and an assignment module For assigning vertex weight information of the vertices of the common model to the composite Similar vertices corresponding to the 3D scan model.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a vertex weight inheritance method for a 3D scan model, the method comprising: obtaining vertex weight information of a common model; wherein, the public model is used for initial The specified part of the 3D scan model is fused to generate a 3D scan model; the synthesized 3D scan model is searched to determine the similar vertices in the vertices of the synthesized 3D scan model and the vertices of all common models; the vertex weight information of the vertices of the common model is assigned Similar vertices corresponding to the corresponding 3D scan model.

Different from the prior art, the vertex weight inheritance apparatus of the 3D scan model of the present invention includes: an acquisition module, configured to acquire vertex weight information of a common model; wherein the common model is used to generate a fusion with a specified part of the initial 3D scan model. a 3D scan model; a search module for finding a synthesized 3D scan model, determining a similar vertex in a vertex of the synthesized 3D scan model and a vertex of all common models; an assignment module for using vertex weight information of the vertex of the common model Assigned to similar vertices in the synthesized 3D scan model. With the present invention, it is possible to control a new 3D model generated by splicing to implement an animated demonstration of the 3D model.

DRAWINGS

1 is a schematic structural diagram of an embodiment of a vertex weight inheritance apparatus of a 3D scan model provided by the present invention;

2 is a schematic flow chart of an embodiment of a vertex weight inheritance method of a 3D scan model provided by the present invention.

detailed description

The technical solution of the present invention will be further described in detail below in conjunction with specific embodiments. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a vertex weight inheritance device of a 3D scan model provided by the present invention. The device 100 includes: an obtaining module 110, a searching module 120, and Assignment module 130.

The obtaining module 110 is configured to obtain vertex weight information of a common model; the common model is configured to merge with a specified part of the initial 3D scan model to generate the 3D scan model. The public model and the verified 3D model are stored in a storage device. In the present invention, a 3D scanning model is obtained by a 3D scanning technique, and a 3D scanning model and a designated portion of a common model are cut by a cutting technique, and then the designated part and the public model after cutting the 3D scanning model are excluded from the designated part. The rest of the part is spliced and combined to obtain a new 3D model. The designated portion referred to in the present invention is usually a 3D scan model and a face of a common model. However, the new 3D model generated is completed by stitching technology. After the stitching, the new 3D model does not inherit the animation data of the public model, and cannot be animated by software. The public model is a model designed by the existing technicians and can be animated by software. The technician sets the vertex weight information for the animation display. The vertices in the public model are associated with the bones in the model, and the movement of the specific vertices is controlled by controlling the movement of the bones, thereby realizing the animation of the public model. The acquisition module 110 obtains weight information for all vertices of the common model, and bone information for all bones.

The lookup module 120 is configured to look up the synthesized 3D scan model and determine similar vertices in the vertices of the synthesized 3D scan model and the vertices of all common models. Through the splicing technique, the face of the 3D scan model and the common model are synthesized except for the face, and a new 3D model is obtained. The newly synthesized 3D model uses the public model directly except for the face. Therefore, in the newly synthesized 3D model, there are multiple vertices that are identical in position to the vertices in the common model. The lookup module 120 is configured to find vertices in the newly synthesized 3D model that form similar vertices with vertices in the common model. In the present invention, among the newly synthesized 3D models, the parts belonging to the pre-synthesis common model, the vertices of the distribution, that is, the vertices of the same or similar positions in the common model constitute similar vertices.

The lookup module 120 includes a coincidence unit 121, a threshold setting unit 122, and a lookup unit 123. The coincidence unit 121 is configured to control the same partial overlap of the common model and the composite 3D scan model, and place the two in a spatial Cartesian coordinate system. The newly synthesized 3D model has the same parts as the public model, such as the top position. In this embodiment, a vertex of a specific position at the top of the common model may be selected, and a space is established with the coordinate origin. In the Cartesian coordinate system, the coincidence unit 121 superimposes the common model and the newly synthesized 3D model in the coordinate system, and realizes the coincidence of the common model and the newly synthesized 3D model by controlling the position and angle of the rotating common model, and finally newly synthesized 3D. The vertices in the model that are the same as the selected vertices in the common model are located at the coordinate origin of the coordinate system, and the newly synthesized 3D model and the multiple vertices near the vertices at the top of the common model have coincident or close positions. After the coincidence, the newly synthesized 3D model overlaps with the vertices of the common model except for the face, and the face vertices are different.

The threshold setting unit 122 sets a threshold range of coordinate values of each vertex in the common model. In the present embodiment, the threshold setting unit 122 may determine a range of coordinate values of the vertices of the common model face. By setting the threshold range of the coordinate values, the vertices of the common model face become a space in the coordinate system due to the range of coordinate values.

The searching unit 123 finds a vertex in which the coordinate value of the synthesized 3D scan model falls within the threshold range of the coordinate value of any vertex in the common model. After the coincidence unit 121 superimposes the newly synthesized 3D model and the common model, the search unit 123 searches for the vertices in the space formed by the coordinate values of the vertices of the common model face on the face portion of the newly synthesized 3D model. The found vertices are set to similar vertices of the vertices of the common model face.

After the searching unit 123 finds the similar vertices of the face of the newly synthesized 3D model and the common model face vertices, the assignment module 130 assigns the vertex weight information of the vertices of the common model to the similar vertices corresponding to the synthesized 3D scan model. .

Further, a bone creation module 140 is further configured. After the assignment module 130 assigns the vertex weight information of the common model to the similar vertex of the 3D scan model, the skeleton information inside the 3D scan model is determined according to the coordinate values of the similar vertex; wherein, the skeleton The information includes at least the shape and location of the bone. The assignment module 130 is also used to assign bone information in the public model to the bone created in the synthesized 3D scan model. The newly synthesized 3D model also has the same bones as in the public model.

Further, a driving module 150 is further included for establishing a bone-to-vertex driving information instruction of the synthesized 3D scanning model. In the present embodiment, the vertex positions in the newly synthesized 3D model are similar or identical to those in the common model, and the bones that control the movement of the respective vertices are also the same. Therefore, after the skeleton-to-vertex drive information command of the synthetic 3D scan model is established, the control information can be controlled. The skeletal drive moves the vertices in the newly synthesized 3D model to achieve positional animation, thus enabling an animated demonstration of the 3D model.

Referring to FIG. 2, FIG. 2 is a schematic flowchart diagram of a vertex weight inheritance method of a 3D scan model provided by the present invention. The steps of the method include:

S210: Acquire vertex weight information of a common model; wherein the common model is used to merge with a specified part of the initial 3D scan model to generate a 3D scan model.

In the present invention, a 3D scanning model is obtained by a 3D scanning technique, and a 3D scanning model and a designated portion of a common model are cut by a cutting technique, and then the designated part and the public model after cutting the 3D scanning model are excluded from the designated part. The rest of the part is spliced and combined to obtain a new 3D model. The designated portion referred to in the present invention is usually a 3D scan model and a face of a common model. However, the new 3D model generated is completed by stitching technology. After the stitching, the new 3D model does not inherit the animation data of the public model, and cannot be animated by software. The public model is a model designed by the existing technicians and can be animated by software. The technician sets the vertex weight information for the animation display. The vertices in the public model are associated with the bones in the model, and the movement of the specific vertices is controlled by controlling the movement of the bones, thereby realizing the animation of the public model. Get weight information for all vertices of the public model, as well as bone information for all bones.

S220: Find a synthesized 3D scan model, and determine similar vertices in the vertices of the synthesized 3D scan model and the vertices of all the common models.

Through the splicing technique, the face of the 3D scan model and the common model are synthesized except for the face, and a new 3D model is obtained. The newly synthesized 3D model uses the public model directly except for the face. Therefore, there are multiple tops in the newly synthesized 3D model. The point is the same as the vertex position in the public model. Finds vertices in a newly synthesized 3D model that form similar vertices with vertices in the public model. In the present invention, among the newly synthesized 3D models, the parts belonging to the pre-synthesis common model, the vertices of the distribution, that is, the vertices of the same or similar positions in the common model constitute similar vertices.

The same parts of the common model and the synthetic 3D scan model are superimposed and placed in a spatial Cartesian coordinate system. The newly synthesized 3D model has the same parts as the public model, such as the top position. In this embodiment, a vertex of a specific position at the top of the common model may be selected, and a spatial rectangular coordinate system is established with the coordinate origin, in which the common model and the newly synthesized 3D model are coincident, and the common model is controlled by rotation. The position and angle of the implementation, the common model and the newly synthesized 3D model are coincident. Finally, the vertices in the newly synthesized 3D model that are the same as the selected vertices in the common model are located at the coordinate origin of the coordinate system, and the newly synthesized 3D model and the common Multiple vertex positions near the vertex where the coordinate origin of the top of the model is located coincide or approach. After the coincidence, the newly synthesized 3D model overlaps with the vertices of the common model except for the face, and the face vertices are different.

Sets the threshold range of coordinate values for each vertex in the public model. In the present embodiment, the range of coordinate values of the vertices of the common model face can be determined. By setting the threshold range of the coordinate values, the vertices of the common model face become a space in the coordinate system due to the range of coordinate values.

Finds the vertices in the composite 3D scan model whose coordinate values fall within the threshold range of the coordinate values of any vertex in the common model. After the newly synthesized 3D model and the common model are overlapped, the vertices in the space formed by the coordinate values of the vertices of the common model face on the face portion of the newly synthesized 3D model are searched, and the found vertices are set. A similar vertex that is defined as the vertex of the common model face.

S230: Assign vertex weight information of the vertices of the common model to similar vertices corresponding to the synthesized 3D scan model.

After finding the similar vertices of the face of the newly synthesized 3D model and the vertices of the common model face, the vertex weight information of the vertices of the common model is assigned to the similar vertices corresponding to the synthesized 3D scan model.

Further, after assigning the vertex weight information of the common model to the similar vertex of the 3D scan model, determining the bone information inside the 3D scan model according to the coordinate values of the similar vertex; The bone information includes at least the shape and position of the bone. At the same time, the bone information in the public model is assigned to the bone created in the synthetic 3D scan model. The newly synthesized 3D model also has the same bones as in the public model.

Further, a skeleton-to-vertex drive information instruction of the synthesized 3D scan model is established. In the present embodiment, the vertex positions in the newly synthesized 3D model are similar or identical to those in the common model, and the bones that control the movement of the respective vertices are also the same. Therefore, after the skeleton-to-vertex driving information command of the synthetic 3D scanning model is established, the position of the vertices in the newly synthesized 3D model of the bone driving can be controlled to realize the animation of the 3D model.

Different from the prior art, the step of the vertex weight inheritance method of the 3D scan model of the present invention comprises: acquiring vertex weight information of a common model; wherein the common model is used to merge with a specified part of the initial 3D scan model to generate a 3D scan model. Finding a synthetic 3D scan model, determining the similar vertices in the vertices of the synthesized 3D scan model and the vertices of all common models; assigning the vertex weight information of the vertices of the common model to the corresponding 3D scan model vertex. With the present invention, it is possible to control a new 3D model generated by splicing to implement an animated demonstration of the 3D model.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A vertex weight inheritance device for a 3D scan model, comprising:

An obtaining module, configured to obtain vertex weight information of a common model; wherein the common model is used to merge with a specified part of an initial 3D scan model to generate the 3D scan model;

a searching module, configured to find the synthesized 3D scan model, and determine a similar vertex in the vertices of the synthesized 3D scan model and all the vertices of the common model;

And an assignment module, configured to assign vertex weight information of the vertices of the common model to similar vertices corresponding to the synthesized 3D scan model.
The vertex weight inheritance device of the 3D scan model according to claim 1, wherein the search module comprises:

a coincidence unit, configured to control the same part of the common model and the synthesized 3D scan model as the common model, and place the two in a space rectangular coordinate system;

a threshold setting unit, configured to set a threshold range of coordinate values of each vertex in the common model;

And a searching unit, configured to search for a vertex in the threshold range of the coordinate value of the coordinate value of any one of the common models in the synthesized 3D scan model.
The vertex weight inheritance apparatus of the 3D scan model according to claim 2, further comprising a bone creation module, configured to assign vertex weight information of the common model to similar vertices of the 3D scan model in the assignment module Thereafter, the bone information inside the 3D scan model is determined according to the coordinate values of the similar vertices; wherein the bone information includes at least the shape and position of the bone.
The vertex weight inheritance apparatus of the 3D scan model according to claim 3, wherein the evaluation module is further configured to assign the bone information in the common model to the bone created in the synthesized 3D scan model.
The vertex weight inheritance apparatus of the 3D scan model according to claim 4, further comprising a driving module, configured to establish a skeleton-to-vertex driving information instruction of the synthesized 3D scan model.
A vertex weight inheritance method for a 3D scan model, comprising:

Obtaining vertex weight information of a common model; wherein the common model is used to merge with a specified part of an initial 3D scan model to generate the 3D scan model;

Finding the synthesized 3D scan model, determining vertices of the synthesized 3D scan model and similar vertices in all vertices of the common model;

The vertex weight information of the vertices of the common model is assigned to a similar vertex corresponding thereto in the synthesized 3D scan model.
The vertex weight inheritance method of the 3D scan model according to claim 6, wherein in the finding the synthesized 3D scan model, determining the vertices of the synthesized 3D scan model and all the vertices of the common model The steps of similar vertices include the steps:

Controlling the same part of the common model and the synthesized 3D scan model as the common model, and placing the two in a spatial rectangular coordinate system;

Setting a threshold range of coordinate values of each vertex in the common model;

Finding vertices in the composite 3D scan model whose coordinate values fall within a threshold range of coordinate values of any of the vertices in the common model.
The method for inheriting vertex weights of a 3D scan model according to claim 7, further comprising the steps of:

After the vertex weight information of the common model is assigned to the similar vertex of the 3D scan model, the bone information inside the 3D scan model is determined according to the coordinate value of the similar vertex; wherein the bone information includes at least the The shape and location of the bone.
The vertex weight inheritance method of the 3D scan model according to claim 8, wherein the skeleton information in the common model is assigned to a skeleton created in the synthesized 3D scan model.
The method for inheriting vertex weights of a 3D scan model according to claim 9, further comprising the step of: establishing a skeleton-to-vertex drive information instruction of the synthesized 3D scan model.