Method for adopting rough drawings to establish three-dimensional human face molds

A technology of 3D face and sketch, applied in the field of sketch creation of 3D face model, can solve the problem that the designer's drawing effect cannot be fully reflected, and the face type depends on it, so as to improve the naturalness and freedom, and meet the requirements of real-time performance. , the effect of small solution space

Inactive Publication Date: 2012-01-04
NANJING UNIV
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Problems solved by technology

Obviously, the types of faces that can be generated by these two methods depend on the size of the predefined template library, and cannot fully reflect the rendering effect of the designer

Method used

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  • Method for adopting rough drawings to establish three-dimensional human face molds
  • Method for adopting rough drawings to establish three-dimensional human face molds
  • Method for adopting rough drawings to establish three-dimensional human face molds

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Embodiment Construction

[0032] The invention discloses a method for creating a three-dimensional human face model by using a sketch, comprising the following steps:

[0033] Step 1, sketch face recognition: preprocess the sketch face to be processed, and recognize the outline of the sketch face according to the spatial distribution rules of facial organs, that is, establish the corresponding relationship between each stroke of the sketch face and the outline of the sketch face ;

[0034] Step 2, three-dimensional face feature extraction: import the three-dimensional face grid model (the three-dimensional face grid model can be generated by software such as Maya, 3DMax) as the template model of the three-dimensional face, respectively from the three-dimensional face grid model Extract the inner contour of the 3D face and the outer contour of the 3D face;

[0035] Step 3, contour matching: extract the two-dimensional shape feature point set from the sketch face contour, and extract the corresponding t...

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Abstract

The invention discloses a method for adopting hand drawing rough drawings to establish three-dimensional human face molds, which comprises the following steps: carrying out pretreatment on rough drawing human faces to be treated; recognizing the rough drawing human face outlines according to the space distribution rules of face organs of the human faces; establishing the corresponding relationship of the rough drawing human face strokes and the rough drawing human face outlines; respectively extracting the three-dimensional human face inner outlines and the three-dimensional human face outer outlines from three-dimensional human face lattice models used as templates according to the Gaussian curvature algorithm and the three-dimensional observation rules; extracting two-dimensional shape feature point sets from the rough drawing human face outlines; extracting corresponding three-dimensional shape feature point sets from the three-dimensional human face outlines; calculating the displacement vector of each point in the three-dimensional shape feature point sets according to the normalized distance between each two-dimensional shape feature point and the center of the rough drawinghuman face; and generating the three-dimensional human face models similar to the rough drawing human faces through the deformation of the three-dimensional human face lattice models according to thedisplacement vector of the three-dimensional shape feature point sets and each feature point. The invention supports the establishment of new three-dimensional human face models by using the existingthree-dimensional human face model in a human face outline hand drawing mode.

Description

technical field [0001] The patent of the present invention relates to a graphic analysis and interpretation software method, which belongs to the technical field of computer software and computer graphics. Specifically, it is a method of using sketches to create a three-dimensional human body through processes such as sketch recognition, shape feature extraction, shape mapping, and model deformation. face model method. Background technique [0002] Since document 1 Parke F, Computer generated animation of faces, In: Proc.ACM NationalConference, 1972: 451-457 pioneered the research on 3D face modeling and animation, such as document 2 Xu Chenghua, Wang Yunhong, Tan Tieniu, 3D face Modeling and Application, Chinese Journal of Image and Graphics, 2004, 9(8): 893-903 and literature 3Deng Z, Noh J Y, Computer facial animation: A survey, Data-Driven 3D Facial Animations, Springer, 2007: 1-28 The large number of 3D face modeling research and application results. However, most of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00G06K9/00G06K9/46
Inventor 孙正兴蒋维宋沫飞张尧烨
Owner NANJING UNIV
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