Method and device for emulating secondary surface dispersion effect of non-physical model

A technology of subsurface scattering and model simulation, applied in the field of image rendering, which can solve problems such as harsh implementation conditions

Active Publication Date: 2008-02-20
TENCENT TECH (SHENZHEN) CO LTD
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Problems solved by technology

[0006] The present invention provides a method and device for simulating the subsurface scattering effect with a non-physical model, which is used to solve the problem in the prior art that a simplified physical model is used to simulate the subsurface scattering effect, so that the realization conditions are harsh

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  • Method and device for emulating secondary surface dispersion effect of non-physical model

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[0046] In order to reduce the realization conditions for simulating the subsurface scattering effect, that is, reduce the rendering cost, the present invention provides a device for simulating the subsurface scattering effect with a non-physical model, as shown in FIG. Unit 1 is connected to an overlay color generation unit 2 and an illumination model color generation unit 3 .

[0047] The illumination model color generating unit 3 is used for simulating the illumination model color (that is, the classic phone illumination model color) according to the prior art. Phone lighting model is the first influential lighting model proposed in realistic graphics. The realism of generated images has reached an acceptable level, but in practical applications, it is only an empirical model. Phone lighting model can be expressed as: the light intensity I reflected from a point P on the object surface to the viewpoint is the sum of the reflected light intensity Ie of ambient light, the idea...

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Abstract

The utility model discloses a method a device for non-physical model simulation secondary surface scattering result, which aims to solve the problems of strict realizing condition of simulating secondary surface scattering result using simplified physical model in prior art. The method of the utility model comprises: A. The illumination model color and the color waiting for superposition are get; B. The color waiting for superposition is superposed with the illumination model color to simulate secondary surface scattering result. The device of the utility model comprises: an illumination model color generation unit, a superposition three color generation unit which is used for generating the color waiting for superposition, a color waiting for superposition which is used for generating the superposition color generation unit and a superposition unit of the illumination model color superposition which is generated with the illumination model color generation unit. The utility model has the advantages of lower cost and reasonable theory compared with the predicted light ray transmission method of realizing secondary surface scattering result.

Description

technical field [0001] The invention relates to the field of image rendering, in particular to a method and device for simulating subsurface scattering effects with a non-physical model. Background technique [0002] Subsurface scattering refers to the phenomenon that light enters the interior of the object after it hits the object, and leaves the object from other vertices (pixels) on the surface of the object through scattering in the object. It is mainly used to simulate a real light and shadow effect displayed inside a transparent or translucent material. For example: when light hits glass or a clear liquid surface, the light will penetrate the medium, and the subsurface scattering effect can be used to simulate the scattering that occurs after the light enters the interior of the medium. Another example: under the light of a candle, the end of the candle near the flame will appear translucent. Another example: human skin illuminated by light, jade illuminated by light...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/50
Inventor 刘皓
Owner TENCENT TECH (SHENZHEN) CO LTD
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