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Title:
用SURE引导自适应采样与采样颜色直方图重构
Alternative Title: Adaptive Sampling Guided by SURE and Sample Color Histogram Reconstruction
Author: 袁红亮 ; 吴付坤 ; 郑昌文
Keyword: GPU加速 ; 自适应采样 ; 均方误差
Source: 计算机辅助设计与图形学学报
Issued Date: 2016
Volume: 28, Issue:4, Pages:533-539
Indexed Type: CSCD
Department: 袁红亮, 中国科学院软件研究所, 中国科学院天基综合信息系统重点实验室, 北京 100190, 中国;吴付坤, 中国科学院软件研究所, 中国科学院天基综合信息系统重点实验室, 北京 100190, 中国;郑昌文, 中国科学院软件研究所, 中国科学院天基综合信息系统重点实验室, 北京 100190, 中国;
Abstract: 针对现有采样颜色直方图重构缺少自适应采样方法的问题, 提出一种基于Stein's unbiased risk estimator(SURE)的像素均方误差计算方法. 首先对图像空间粗采样; 然后在GPU上分块计算SURE来评估图像每个像素的误差度量值, 并用该值引导非均匀自适应采样; 最后使用非局部多尺度滤波方法重构图像. 实验结果表明, 不论从图像噪声定量化指标还是视觉效果来看, 该方法都极大地改进了图像绘制质量.
English Abstract: We present an approach for computing pixel-wise mean squared error based on Stein's unbiased risk estimator (SURE), to perform adaptive sampling for histogram-based sample reconstruction in Monte Carlo path tracing. Firstly, the image space is coarsely sampled; then we compute SURE on GPU by block estimates error metric of each pixel, to guide subsequent non-uniform adaptive sampling. Finally, nonlocal multi-scale filtering is used to reconstruct image. The experimental results demonstrate substantial improvements in terms of both numerical error and visual quality.
Language: 中文
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Content Type: 期刊论文
URI: http://ir.iscas.ac.cn/handle/311060/17369
Appears in Collections:软件所图书馆_期刊论文

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Recommended Citation:
袁红亮,吴付坤,郑昌文. 用SURE引导自适应采样与采样颜色直方图重构[J]. 计算机辅助设计与图形学学报,2016-01-01,28(4):533-539.
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