图 书 馆
在空间变化照明下光传输的频率-空间的分解和获取Frequency-Space Decomposition and Acquisition of Light Transport under Spatially Varying Illumination |
|
| 课程网址: | http://videolectures.net/eccv2012_ramamoorthi_decomposition/ |
| 主讲教师: | Bernt Schiele; David Forsyth; Ravi Ramamoorthi |
| 开课单位: | 加州大学伯克利分校 |
| 开课时间: | 2012-11-12 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | We show that, under spatially varying illumination, the light transport of diffuse scenes can be decomposed into direct, near-range (subsurface scattering and local inter-reflections) and far-range transports (diffuse inter-reflections). We show that these three component transports are redundant either in the spatial or the frequency domain and can be separated using appropriate illumination patterns. We propose a novel, efficient method to sequentially separate and acquire the component transports. First, we acquire the direct transport by extending the direct-global separation technique from floodlit images to full transport matrices. Next, we separate and acquire the near-range transport by illuminating patterns sampled uniformly in the frequency domain. Finally, we acquire the far-range transport by illuminating low-frequency patterns. We show that theoretically, our acquisition method achieves the lower bound our model places on the required number of patterns. We quantify the savings in number of patterns over the brute force approach. We validate our observations and acquisition method with rendered and real examples throughout. |
| 关 键 词: | 计算机视觉; 间漫反射; 光照模式分离 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2021-01-28：nkq |
| 阅读次数: | 26 |