Virtual-Point-Light Sampling Algorithm Based on Indirect Illumination Clustering of Visible Scene Region

Authors

Chen Sheng, School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;
Chunyi Chen, School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;
Qiwei Xing, School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;
Chaozhi Yang, School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;

Abstract

Abstract: Focusing on the accuracy of indirect illumination calculation, an improved view-sensitive virtual point light (VPL) sampling method is proposed. The visible shading points are clustered according to the positions and normal vectors. The product of the contribution of VPLs on the representative visible shading points and the number of VPLs belonging to the same class is calculated, and the sum of the products is treated as the estimation of the indirect illumination which constructs the cumulative distribution function (CDF). On the basis of the CDF, the VPLs of calculating the indirect illumination on every visible shading point are selected. Experiment results show that the proposed algorithm can achieve better indirect lighting effect with fewer VPLs, and improve the accuracy of indirect illumination calculation.

Recommended Citation

Sheng, Chen; Chen, Chunyi; Xing, Qiwei; and Yang, Chaozhi (2020) "Virtual-Point-Light Sampling Algorithm Based on Indirect Illumination Clustering of Visible Scene Region," Journal of System Simulation: Vol. 32: Iss. 6, Article 11.
DOI: 10.16182/j.issn1004731x.joss.18-VR0742
Available at: https://dc-china-simulation.researchcommons.org/journal/vol32/iss6/11

First Page

1085

Revised Date

2018-11-26

DOI Link

https://doi.org/10.16182/j.issn1004731x.joss.18-VR0742

Last Page

1093

CLC

TP314

Recommended Citation

Chen Sheng, Chen Chunyi*, Xing Qiwei, Yang Chaozhi. Virtual-Point-Light Sampling Algorithm Based on Indirect Illumination Clustering of Visible Scene Region[J]. Journal of System Simulation, 2020, 32(6): 1085-1093.

Corresponding Author

Chunyi Chen,

DOI

10.16182/j.issn1004731x.joss.18-VR0742