Toward Evaluating Progressive Rendering Methods in Appearance Design Tasks
Toward Evaluating Progressive Rendering Methods in Appearance Design Tasks
复制标题
评估外观设计任务中的渐进式渲染方法
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
F. Pellacini
中科院分区：
文献类型：
--
作者：
Jiawei Ou;F. Pellacini
渐进式渲染正在成为外观设计任务中预计算方法的一种流行替代方法。在计算的早期阶段，由不同的渐进算法生成的图像表现出各种视觉伪影。我们提出了一项用户研究，调查了这些人工产物在外观设计任务中对用户性能的影响。具体地说，我们要求新手和专家使用以下算法执行照明和材质编辑任务：随机路径跟踪、准随机路径跟踪、渐进光子贴图和虚拟点光源(VPL)渲染。从实验中收集的数据表明，无论是专家还是新手，路径跟踪都比渐进光子映射和VPL渲染更受欢迎。没有迹象表明准随机路径跟踪在系统上比随机路径跟踪更受欢迎，反之亦然；渐进光子映射和VPL渲染之间也是如此。有趣的是，我们没有观察到不同算法在用户工作流中的任何显著差异。正如可以预期的那样，专家比新手更快、更准确，但令人惊讶的是，这两组人的主观偏好和工作流程相似。
Progressive rendering is becoming a popular alternative to precomputation approaches for appearance design tasks. Images created by different progressive algorithms exhibit various kinds of visual artifacts at the early stages of computation. We present a user study that investigates the effects of these artifacts on user performance in appearance design tasks. Specifically, we ask both novice and expert subjects to perform lighting and material editing tasks with the following algorithms: random path tracing, quasi-random path tracing, progressive photon mapping, and virtual point light (VPL) rendering. Data collected from the experiments suggest that path tracing is strongly preferred to progressive photon mapping and VPL rendering by both experts and novices. There is no indication that quasi-random path tracing is systematically preferred to random path tracing or vice-versa; the same holds between progressive photon mapping and VPL rendering. Interestingly, we did not observe any significant difference in user workflow for the different algorithms. As can be expected, experts are faster and more accurate than novices, but surprisingly both groups have similar subjective preferences and workflow.