(数字媒体技术教育部工程中心) 学科前沿讨论班通知(2015-2016学年上学期.NO.5) 打印 E-mail
作者:mudcup   
2015-10-21 14:27

山东大学 人机交互与虚拟现实中心(数字媒体技术教育部工程中心)学科前沿讨论班通知(2015-2016学年上学期.NO.5)

2015.10.21人机交互与虚拟现实中心本学期第3次前沿学科讨论班将于10月22日(本周四)

下午1:30-3:30 在数字媒体技术教育部工程研究中心一层第二会议室(111-113)举行。

请大家踊跃参加。报告人: 徐安敏(导师:吕琳副教授)请相关学科方向的老师和同学出席讨论班。欢迎其他学科方向的老师和同学积极参加。

附件: 报告题目与摘要
题目

Modeling Anisotropic Surface Reflectance with Example-Based Microfacet Synthesis

摘 要

We present a new technique for the visual modeling of spatially varying anisotropic reflectance using data captured from a single view. Reflectance is represented using a microfacet-based BRDF which tabulates the facets’ normal distribution (NDF) as a function of surface location. Data from a single view provides a 2D slice of the 4D BRDF at each surface point from which we fit a partial NDF. The fitted NDF is partial because the single view direction coupled with the set of light directions covers only a portion of the “half-angle” hemisphere. We complete the NDF at each point by applying a novel variant of texture synthesis using similar, overlapping partial NDFs from other points. Our similarity measure allows azimuthal rotation of partial NDFs, under the assumption that reflectance is spatially redundant but the local frame may be arbitrarily oriented. Our system includes a simple acquisition device that collects images over a 2D set of light directions by scanning a linear array of LEDs over a flat sample. Results demonstrate that our approach preserves spatial and directional BRDF details and generates a visually compelling match to measured materials.

 

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