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Method for accelerating drawing of direct illumination effect of three-dimensional scene by means of area light source visible spatial correlation

A 3D scene and surface light source technology, applied in 3D image processing, image data processing, instruments, etc., can solve the problem of large rendering time overhead

Active Publication Date: 2017-11-14
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

This results in a large drawing time overhead

Method used

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  • Method for accelerating drawing of direct illumination effect of three-dimensional scene by means of area light source visible spatial correlation

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Embodiment Construction

[0023] In order to make the features and advantages of the method more clear, the method will be further described below in conjunction with specific embodiments. This embodiment considers a 3D model of a room containing a rabbit and a table, where a flat rectangular surface light source is used to illuminate the 3D scene. The CPU of the computer system is Intel(R) Xeon(R) CPU E3-1225 v3 @3.20GHz, the memory is Kingston 8GB DDR3 1333, the disk is Buffalo HD-CE 1.5 TU2, the graphics card is NVidia Quadro K2000; the computer operating system is Windows 7 , the software programming tool uses VC++ 2010.

[0024] The present invention utilizes surface light source visibility space correlation to accelerate the method for rendering direct lighting effect of three-dimensional scene, which is characterized in that: the virtual camera is placed at the position of the viewpoint, and the three-dimensional scene is drawn by light projection technology according to the shooting parameters ...

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Abstract

The invention relates to a method for accelerating drawing of a direct illumination effect of a three-dimensional scene by means of area light source visible spatial correlation. According to the method, a characteristic of spatial correlation between area light source sampling point visibility of adjacent visible field scene points on the same geometrical object surface is utilized. In calculating a direct illumination approximate value of the visible scene point, the area light source sampling points and the visibility calculation result of the visible field scene point and the adjacent visible field scene points on the same geometrical object surface are utilized for finishing Monte Carlo direct illumination estimation, and the number of area light source sampling points for direct illumination contribution estimation of the visible field scene point is increased at a relatively low cost, thereby improving quality of a drawn image frame. The method increases an operation for testing whether the visible field scene points which correspond with the adjacent pixels are in the same geometrical object surface, thereby remarkably reducing direct illumination effect distortion caused by visibility multiplexing at a boundary between different geometrical objects in the image frame.

Description

technical field [0001] The invention relates to a method for accelerating the direct lighting effect rendering of a three-dimensional scene by utilizing the spatial correlation of the visibility of a surface light source, and belongs to the technical field of realistic three-dimensional scene rendering. Background technique [0002] In 3D scene rendering, for the convenience of realization, the light source is often modeled as a point light source. However, few light sources in real life are truly point light sources. Area lights are a common type of light source. When drawing a 3D scene, if the light source illuminating the 3D scene is a surface light source, it is usually necessary to sample the surface light source to obtain a series of light source sampling points, and then use the Monte Carlo direct illumination value estimation technique to obtain the effect of the surface light source on the 3D scene points. Approximate direct lighting contribution. The paper publi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/06G06T15/50
CPCG06T15/06G06T15/506
Inventor 陈纯毅杨华民蒋振刚
Owner CHANGCHUN UNIV OF SCI & TECH
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