Search Results for author: Xiaochun Liu

Found 7 papers, 0 papers with code

Virtual Light Transport Matrices for Non-Line-Of-Sight Imaging

no code implementations ICCV 2021 Julio Marco, Adrian Jarabo, Ji Hyun Nam, Xiaochun Liu, Miguel Ángel Cosculluela, Andreas Velten, Diego Gutierrez

The light transport matrix (LTM) is an instrumental tool in line-of-sight (LOS) imaging, describing how light interacts with the scene and enabling applications such as relighting or separation of illumination components.

Real-time Non-line-of-Sight imaging of dynamic scenes

no code implementations24 Oct 2020 Ji Hyun Nam, Eric Brandt, Sebastian Bauer, Xiaochun Liu, Eftychios Sifakis, Andreas Velten

Non-Line-of-Sight (NLOS) imaging aims at recovering the 3D geometry of objects that are hidden from the direct line of sight.

Encompassing Tests for Value at Risk and Expected Shortfall Multi-Step Forecasts based on Inference on the Boundary

no code implementations15 Sep 2020 Timo Dimitriadis, Xiaochun Liu, Julie Schnaitmann

We propose forecast encompassing tests for the Expected Shortfall (ES) jointly with the Value at Risk (VaR) based on flexible link (or combination) functions.

Optimizing AD Pruning of Sponsored Search with Reinforcement Learning

no code implementations5 Aug 2020 Yijiang Lian, Zhijie Chen, Xin Pei, Shuang Li, Yifei Wang, Yuefeng Qiu, Zhiheng Zhang, Zhipeng Tao, Liang Yuan, Hanju Guan, Kefeng Zhang, Zhigang Li, Xiaochun Liu

Industrial sponsored search system (SSS) can be logically divided into three modules: keywords matching, ad retrieving, and ranking.

Analysis of Feature Visibility in Non-Line-Of-Sight Measurements

no code implementations CVPR 2019 Xiaochun Liu, Sebastian Bauer, Andreas Velten

We formulate an equation describing a general Non-line-of-sight (NLOS) imaging measurement and analyze the properties of the measurement in the Fourier domain regarding the spatial frequencies of the scene it encodes.

Virtual Wave Optics for Non-Line-of-Sight Imaging

no code implementations17 Oct 2018 Xiaochun Liu, Ibón Guillén, Marco La Manna, Ji Hyun Nam, Syed Azer Reza, Toan Huu Le, Diego Gutierrez, Adrian Jarabo, Andreas Velten

Since imaging information cannot be recovered from the irradiance arriving at the relay surface, we introduce the concept of the phasor field, a mathematical construct representing a fast variation in irradiance.

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