End-to-end Surface Optimization for Light Control

：邓柏林（英国卡迪夫大学）
：2023-11-14 10:00
：海韵园实验楼105报告厅

报告人：邓柏林（英国卡迪夫大学）

时  间：2023年11月14日10:00

地  点：海韵园实验楼105报告厅

内容摘要:

Designing a freeform surface to reflect or refract light to achieve a target distribution is a challenging inverse problem. In this talk, I will present an end-to-end optimization strategy for such an optical surface. Our formulation leverages a novel differentiable rendering model, and is directly driven by the difference between the resulting light distribution and the target distribution.

To avoid local minima, we also formulate a face-based optimal transport between the current distribution and the target distribution, to induce large effective changes to the surface shape. By combining our OT update and rendering guided optimization in an iterative manner, our method can produce lens designs with a resulting image that closely resembles the target. The effectiveness of our algorithm is demonstrated using both simulation and physical prototypes.

个人简介：

Bailin Deng is a Senior Lecturer at the School of Computer Science and Informatics at Cardiff University, and leads its Geometric Computing and Graphics Group. His research interests include geometry processing, numerical optimization, computational design, and digital fabrication. He has published more than forty papers in top international journals such as ACM Transactions on Graphics, IEEE Transactions on Pattern Analysis and Machine Intelligence, Transactions on Visualization and Computer Graphics, Computer-Aided Design. He received a BEng degree in computer software (2005) and an MSc degree in computer science (2008) from Tsinghua University, and a PhD degree in mathematics from Vienna University of Technology (2011). Before joining Cardiff, he was a postdoctoral researcher at EPFL (2012-2015) and a Lecturer at University of Hull (2015-2017).  He is an associate editor of IEEE Computer Graphics and Applications.

 

联系人：曹娟