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Realistic rendering method for face model of layered structure

A face model, layered technology, applied in the field of photorealistic rendering of face models, can solve the problems of inability to reflect scattering and absorption, lack of rosy and transparent face, and rigid rendering effect, and achieve the effect of improving realism.

Active Publication Date: 2017-09-15
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the BRDF method to render the human face does not reflect the scattering and absorption of light in the dermis, so the rendering effect is stiff and lacks the unique ruddy and transparent feeling of the human face

Method used

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  • Realistic rendering method for face model of layered structure
  • Realistic rendering method for face model of layered structure
  • Realistic rendering method for face model of layered structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a real rendering method of a layered mechanism human face model, such as figure 1 shown, including the following steps:

[0032] Step 1, face data preparation, including a 3D model of the face, diffuse reflection texture of the face, normal texture of the face and skin detail texture. Such as image 3 Shown is the original unrendered face model; it looks stilted.

[0033] Step 2, set the light source in the scene to I 1 and I 2 . I 1 Indicates the light source intensity of the incident light on the epidermis (generally natural light, the light intensity is about 100lux to 130lux). I 2 The function of is to simulate the incident light of the scattering phenomenon in the human face dermis. According to the optical characteristics of skin tissue, only about 6% of the light source is diffusely reflected in the epidermis of the face, and most of the light enters the dermis and is emitted after multiple scattering and absorption by the interna...

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Abstract

The invention discloses a realistic rendering method for a face model of a layered structure. The method comprises the steps that 1, face data is prepared, wherein the face data comprises a face three-dimensional model, diffuse reflection texture of a face, normal texture of the face and skin detail texture; and 2, the sum of ambient light intensity I<am>, specular reflection light intensity I<sp> of a sebum layer, diffuse reflection light intensity I<diff> of an epidermal layer and subsurface scattering light intensity of a corium layer (I<R2>, I<G2> and I<B2>) is output to the face model to obtain a final rendering effect I. Through the method, the semitransparent characteristic of the face model can be better displayed, and the sense of reality of the rendering effect is improved while real-time rendering is guaranteed.

Description

technical field [0001] The invention belongs to the realistic rendering technology of a three-dimensional model, in particular to a realistic rendering method of a human face model with a layered structure. Background technique [0002] For a long time, how to render a more realistic human face faster has been an important topic in the field of computer graphics, and it is also of great significance to many fields, such as virtual reality, medical simulation, film and television entertainment, and so on. In the prior art, the rendering technology often used in game production software is HLSL (High Level Shader Language), which can quickly and efficiently complete some complex image processing on the display card. A commonly used method is the bidirectional reflectance distribution function (BRDF) model. BRDF assumes that the incident position and exit position of light on the object are at the same point, and does not consider the multiple absorption and scattering phenome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/50
Inventor 周明全王恒耿国华
Owner NORTHWEST UNIV(CN)
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