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Vivid static-state hair modeling method based on multiple direction fields

A modeling method and directional field technology, which are applied in the field of realistic static hair modeling based on multi-directional fields, can solve the problem that the distribution of hair roots and hair strands cannot be guaranteed to be realistic, and achieve uniform hair strand distribution and continuous growth direction. , the effect of improving the accuracy

Inactive Publication Date: 2016-03-16
BEIHANG UNIV
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Problems solved by technology

This type of method can better preserve the external structure of the hair, but it cannot guarantee that the distribution of the hair roots and strands conforms to the real one.

Method used

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  • Vivid static-state hair modeling method based on multiple direction fields
  • Vivid static-state hair modeling method based on multiple direction fields
  • Vivid static-state hair modeling method based on multiple direction fields

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and example the present invention is described in further detail:

[0027] Such as figure 1 Shown, concrete steps of the present invention are as follows (the step in the dotted line frame is prior art):

[0028] 1. Generate a three-dimensional hair model with directions from the multi-viewpoint images taken after calibration.

[0029] First, use the existing technology to solve the direction field of the two-dimensional image under each viewpoint, and then use the two-dimensional hair segment tracking algorithm to obtain a reliable two-dimensional hair segment S2D. The direction field is composed of 32 symmetrical Gabor kernel functions , the direction θ is uniformly distributed between [0,π]:

[0030] K θ ( u , v ) = exp ( - 1 2 ...

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Abstract

The invention discloses a vivid static-state hair modeling method based on multiple direction fields. The modeling method comprises following steps of 1: based on acquired multi-view hair images, firstly obtaining two-dimensional hair filament segments and hair point cloud models and then generating two-dimensional hair filament segment hair models with directions; 2: according to results of the first step, carrying out direction field solving and keeping regularization of direction fields of structures; and 3: constructing a static-state hair model based on multiple direction fields. The step 3 comprises three stages of generating vivid hair roots, constructing hair filament generating rules and optimizing the three-dimensional hair filament hair models. According to the invention, compared with other hair modeling method based on multi-view images, the modeling method can keep structures of hair in appearance, be approximate to acquisition data, and also allow the inner hair filaments to grow and be distributed in a quite true and reliable manner.

Description

technical field [0001] The invention belongs to the field of virtual reality technology and computer vision, especially the field of static hair modeling based on multiple images. Specifically, three-dimensional reconstruction is carried out by multiple hair photos taken from different viewpoints, including generating oriented three-dimensional hair segments Hair model, direction field solution and structure-preserving direction field regularization, and construction of static hair models based on multi-directional fields are mainly used in digital games, film and television animation, advertising and other fields. Background technique [0002] Hair modeling is one of the important research contents in the fields of virtual reality and computer graphics. There are two main methods of hair modeling: one is the hair modeling method based on physics, which adopts the hair physical model conforming to the physical laws, and constructs different hair models by setting different p...

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Application Information

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IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 包永堂齐越
Owner BEIHANG UNIV
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