Material high realistic rendering algorithm based on bidirectional reflectance distribution function (BRDF) measured data

A technology of measured data and realism, applied in image data processing, 3D image processing, calculation, etc., can solve the problems of poor realism, no universality, laborious setting process, etc., and achieve high-resolution effects

Active Publication Date: 2013-04-10
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

However, this setting process is quite laborious and not universal, and the simulated realism is poor, and the rendered car usually looks like it is made of plastic

Method used

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  • Material high realistic rendering algorithm based on bidirectional reflectance distribution function (BRDF) measured data
  • Material high realistic rendering algorithm based on bidirectional reflectance distribution function (BRDF) measured data
  • Material high realistic rendering algorithm based on bidirectional reflectance distribution function (BRDF) measured data

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Embodiment Construction

[0027] This embodiment describes the method of the present invention in detail by rendering the car paint.

[0028] A material high-realistic rendering algorithm based on BRDF measured data, including the following steps:

[0029] (1) BRDF data acquisition and modeling

[0030] For the highly specular car paint, it is difficult to represent it with the traditional coordinate system. Therefore, a parametric representation based on half-way vectors is used, which can express the BRDF value of strong light sampling very compactly.

[0031] like figure 1 as shown, figure 1 is the coordinate representation in the normal BRDF function, where ω 0 Indicates the direction of the outgoing light, ω i Indicates the direction of the incident light, figure 2 where is a parametric representation based on half-range vectors, put θ h and θ d Respectively discretize into 90bins, the Ф d It is discretized into 180 bins. During the actual data collection process, not all bins at all loca...

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Abstract

The invention discloses a material high realistic rendering algorithm based on bidirectional reflectance distribution function (BRDF) measured data. The material high realistic rendering algorithm includes the following steps: (1) collecting measured data of material light and fitting a rendering model of the material according to the measured data, (2) exerting high dynamic environment light on the rendering model, and (3) collecting the environment light at a random discretization direction in the rendering process, and rendering the material through utilization of the rendering model in the step (1). The material high realistic rendering algorithm based on the BRDF measured data utilizes sampling data of the material of real automobiles, fits the rendering model for material, uses the high dynamic environment light to illuminate the rendering model, and obtains a rendering effect of the material with a good realistic feeling.

Description

technical field [0001] The invention relates to the technical field of computer graphics rendering, in particular to a high-realistic material rendering algorithm based on BRDF measured data. Background technique [0002] An important application of computer graphics in industry is "virtual prototyping", that is, the design process of industrial products (such as: automobiles) is completely digitalized, and design decisions are mainly based on computer-generated "virtual prototyping". Obviously, only rendering images and Real industrial products are close enough to satisfy design decisions. [0003] The Chinese invention whose authorization notification number is CN101610423B discloses a method and device for rendering an image. The method includes: selecting one of the left view and the right view of the image to be processed as the first view, and the other as the second view, Calculate the depth map for the first view to obtain the depth map corresponding to the first vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/06G06T15/50
Inventor 赵磊李伟鲁东明包倪光李裕麒任艳姣陆胜
Owner ZHEJIANG UNIV
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