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Multi-light-source scene rendering method based on light fragmentation

A multi-light source and scene technology, applied in 3D image processing, image data processing, instruments, etc., can solve problems such as multi-light sources, achieve the effects of reducing calculation, improving rendering efficiency and rendering effect, and increasing rendering rate

Inactive Publication Date: 2015-06-24
ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a multi-light source scene rendering method based on light slicing, which is used to solve the multi-light source problem during rendering

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  • Multi-light-source scene rendering method based on light fragmentation
  • Multi-light-source scene rendering method based on light fragmentation
  • Multi-light-source scene rendering method based on light fragmentation

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with specific embodiments.

[0037] A multi-light source scene rendering method based on light slicing, comprising the following steps:

[0038] (1) Slice the initial global light source matrix A according to the geometric proximity of each sampling surface in the multi-light source scene to be rendered, and obtain several slices. The size of each slice obtained depends on the multi-light source scene to be rendered, and the size of each slice is not necessarily equal. In this embodiment, based on the geometric proximity relationship of the sampling surface, a top-down kd-blocking method is used to cluster the light source matrix, and a cluster is regarded as a slice.

[0039]For details, please refer to the reference "WALTER, B., ARBREE, A., BALA, K., ANDGREENBERG, D.P. 2006. Multidimensional lightcuts. ACM Transactions on Graphics 25,3 (July), 1081–1088" proposed an automatic The top-down kd-bloc...

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Abstract

The invention discloses a multi-light-source scene rendering method based on light fragmentation. The method comprises the following steps that fragmentation is carried out on an initial global light source matrix of a multi-light-source scene to be rendered according to the geometry adjacent relationship of each sampling plane in the multi-light-source scene to be rendered, and multiple sections are obtained; sampling is carried out on each section to form a sampling matrix of the initial global light source matrix, light source clustering is carried out on the sampling matrix to obtain a clustered sampling matrix, and segmenting matrixes of all the sections are formed; a pixel value of a corresponding pixel point is computed according to all the segmenting matrixes, and the multi-light-source scene to be rendered is rendered through a low-rank matrix completion method. The initial global light source matrix is segmented step by step through the light segmentation method, similar pixel points and similar light sources are clustered together, the rank of the initial global light source matrix is reduced greatly, the global structure of the matrix is ensured, the local change features in each section are reserved, and the rendering efficiency and effect are greatly improved.

Description

technical field [0001] The invention relates to the field of computer graphics and images, in particular to a multi-light source scene rendering method based on light slices. Background technique [0002] Recent studies have shown that complex lighting effects can obtain approximate structures by superimposing the contributions of hundreds of thousands of virtual point lights (VPL, virtual point lights). This final stacking step is known as the multi-light source problem. Due to the huge number of point lights, it is infeasible to calculate the contribution of all point lights. [0003] Photorealistic rendering is one of the most studied problems in computer graphics. Many algorithms have been proposed to solve the rendering problem in complex lighting scenes. Fast computation of global illumination for large and complex scenes is always a challenge in the field of computer graphics. Many methods have been used to solve this problem, such as two-way path tracing, photon ...

Claims

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Application Information

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IPC IPC(8): G06T15/55G06T15/60
Inventor 陆琼张根源
Owner ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS