法国国家科学研究中心（CNRS）研究主任 Frederic Dufaux 教授来访并作报告

报告人：Frederic Dufaux

时间：2025年10月30日  

地点：北京交通大学九教北613

报告主题：G-Sem TMO for HDR Tone Mapping

报告摘要：A Tone Mapping Operator (TMO) renders High Dynamic Range (HDR) images on limited-dynamic-range media, compressing dynamic range to preserve visual perceptual cues. Prior studies highlight that semantic-aware TMOs those understanding scene content better preserve these cues, analogous to expert photographers’ manual tonal adjustments based on scene semantics/context. This work presents G-SemTMO, a graph-based semantic-aware TMO inspired by photographers. It uses scene semantic and contextual info (via a graph of semantic segments’ spatial arrangements) and Graph Convolutional Networks (GCN)to predict "Semantic Hints," which guide local tonal adjustments for different semantic segments.

报告人简介：Dr. Frederic Dufaux holds an M.Sc.in Physics(1990)and a Ph.D. in Electrical Engineering (1994), both from EPFL, Lausanne, Switzerland. With over 20 years of research experience, he worked as a Research Assistant EPFL(1990-1994),a Visiting Researcher at AT&TBell Laboratories(Summer 1992),a Postdoctora Fellow at MIT(1994-1995), and a Senior Research Staff at Digital Equipment Corp./ Compag(19952001). Later, he joined Genimedia SA(2001)as Principal Solutions Architect, served at EPFL(20032010)and Emitall Surveillance SA(2003-2009)in keyroles, and has been CNRS Research Director and Editor-in-Chief of Signal Processing: Image Communication since 2010. He is an lEEE Fellow and has held key leadership roles, including Vice Genera Chair of ICIp 2014,Chair of the EURASIP Special Area Team on Visual Information Processing, and elected member of multiple EEE Technical Committees. With over 15 years of involvement in PEG and JPEG standardization, he co-chaired JPEG 2000 over Wireless (JPWL) and JPSearch, earning two ISO awards for his contributions.