Adaptive importance photon shooting technique
文献类型：期刊论文
| 作者 | Liu, Xiao-Dan (1) ; Zheng, Chang-Wen (1) |
| 刊名 | Computers and Graphics (Pergamon)
 |
| 出版日期 | 2014 |
| 卷号 | 38期号:1页码:158-166 |
| 关键词 | Adaptive importance shooting kd-tree Progressive photon mapping Cumulative distribution function |
| ISSN号 | 978493 |
| 通讯作者 | Liu, X.-D.(lxdfigo@163.com) |
| 中文摘要 | Photon mapping is an efficient technique in global illumination and participating media rendering, but it converges slowly in complex scenes. We propose an adaptive importance photon shooting technique to accelerate the convergence rate. We analyze the scene space and build cumulative distribution functions on the surfaces to adaptively shoot photons. The rendering space is partitioned by kd-tree structure. The photons tracing through the scene are stored in the kd-tree node. An error criterion is proposed to estimate the feature error of the local light field in each node. In order to adaptively shoot photons, a novel adaptive cumulative distribution function is built in each node based on their neighbors' error values. When a photon hits a surface in the scene, the reflection direction of this photon is adaptively chosen by our cumulative distribution function. Our technique can be used in both photon mapping and progressive photon mapping. The experiments show that our adaptive importance photon shooting technique gives better results than the previous methods in both visual quality and numerical error. © 2013 Elsevier Ltd. |
| 英文摘要 | Photon mapping is an efficient technique in global illumination and participating media rendering, but it converges slowly in complex scenes. We propose an adaptive importance photon shooting technique to accelerate the convergence rate. We analyze the scene space and build cumulative distribution functions on the surfaces to adaptively shoot photons. The rendering space is partitioned by kd-tree structure. The photons tracing through the scene are stored in the kd-tree node. An error criterion is proposed to estimate the feature error of the local light field in each node. In order to adaptively shoot photons, a novel adaptive cumulative distribution function is built in each node based on their neighbors' error values. When a photon hits a surface in the scene, the reflection direction of this photon is adaptively chosen by our cumulative distribution function. Our technique can be used in both photon mapping and progressive photon mapping. The experiments show that our adaptive importance photon shooting technique gives better results than the previous methods in both visual quality and numerical error. © 2013 Elsevier Ltd. |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000331596300020 |
| 公开日期 | 2014-12-16 |
| 源URL | [http://ir.iscas.ac.cn/handle/311060/16871]  |
| 专题 | 软件研究所_软件所图书馆_期刊论文 |
| 推荐引用方式 GB/T 7714 | Liu, Xiao-Dan ,Zheng, Chang-Wen . Adaptive importance photon shooting technique[J]. Computers and Graphics (Pergamon),2014,38(1):158-166. |
| APA | Liu, Xiao-Dan ,&Zheng, Chang-Wen .(2014).Adaptive importance photon shooting technique.Computers and Graphics (Pergamon),38(1),158-166. |
| MLA | Liu, Xiao-Dan ,et al."Adaptive importance photon shooting technique".Computers and Graphics (Pergamon) 38.1(2014):158-166. |
入库方式： OAI收割
来源：软件研究所
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