Search Results for author: Lei Xiao

Found 29 papers, 7 papers with code

Diffuse Mirrors: 3D Reconstruction from Diffuse Indirect Illumination Using Inexpensive Time-of-Flight Sensors

no code implementations CVPR 2014 Felix Heide, Lei Xiao, Wolfgang Heidrich, Matthias B. Hullin

The functional difference between a diffuse wall and a mirror is well understood: one scatters back into all directions, and the other one preserves the directionality of reflected light.

3D Reconstruction

Discriminative Transfer Learning for General Image Restoration

no code implementations27 Mar 2017 Lei Xiao, Felix Heide, Wolfgang Heidrich, Bernhard Schölkopf, Michael Hirsch

Recently, several discriminative learning approaches have been proposed for effective image restoration, achieving convincing trade-off between image quality and computational efficiency.

Computational Efficiency Deblurring +3

PBODL : Parallel Bayesian Online Deep Learning for Click-Through Rate Prediction in Tencent Advertising System

no code implementations4 Jul 2017 Xun Liu, Wei Xue, Lei Xiao, Bo Zhang

Then we extend the model family to a variety of bayesian online models with increasing feature embedding capabilities, such as Sparse-MLP, FM-MLP and FFM-MLP.

Click-Through Rate Prediction

AdaDNNs: Adaptive Ensemble of Deep Neural Networks for Scene Text Recognition

no code implementations10 Oct 2017 Chun Yang, Xu-Cheng Yin, Zejun Li, Jianwei Wu, Chunchao Guo, Hongfa Wang, Lei Xiao

Recognizing text in the wild is a really challenging task because of complex backgrounds, various illuminations and diverse distortions, even with deep neural networks (convolutional neural networks and recurrent neural networks).

Scene Text Recognition

Field-aware Calibration: A Simple and Empirically Strong Method for Reliable Probabilistic Predictions

no code implementations26 May 2019 Feiyang Pan, Xiang Ao, Pingzhong Tang, Min Lu, Dapeng Liu, Lei Xiao, Qing He

It is often observed that the probabilistic predictions given by a machine learning model can disagree with averaged actual outcomes on specific subsets of data, which is also known as the issue of miscalibration.

BIG-bench Machine Learning Click-Through Rate Prediction

Neural supersampling for real-time rendering

1 code implementation ACM Transactions on Graphics 2020 Lei Xiao, Salah Nouri, Matt Chapman, Alexander Fix, Douglas Lanman, Anton Kaplanyan

Due to higher resolutions and refresh rates, as well as more photorealistic effects, real-time rendering has become increasingly challenging for video games and emerging virtual reality headsets.

Video Super-Resolution

A feature-supervised generative adversarial network for environmental monitoring during hazy days

no code implementations5 Aug 2020 Ke Wang, Si-Yuan Zhang, Junlan Chen, Fan Ren, Lei Xiao

First, pairs of hazy and clean images are used as inputs to supervise the encoding process and obtain high-quality feature maps.

Generative Adversarial Network

KCoreMotif: An Efficient Graph Clustering Algorithm for Large Networks by Exploiting k-core Decomposition and Motifs

no code implementations21 Aug 2020 Gang Mei, Jingzhi Tu, Lei Xiao, Francesco Piccialli

Comparative results demonstrate that the proposed graph clustering algorithm is accurate yet efficient for large networks, which also means that it can be further used to evaluate the intra-cluster and inter-cluster trusts on large networks.

Clustering Graph Clustering

Mixture of Virtual-Kernel Experts for Multi-Objective User Profile Modeling

1 code implementation4 Jun 2021 Zhenhui Xu, Meng Zhao, Liqun Liu, Lei Xiao, Xiaopeng Zhang, Bifeng Zhang

This paper introduces a novel multi-task model called Mixture of Virtual-Kernel Experts (MVKE) to learn user preferences on various actions and topics unitedly.

Recommendation Systems TAG

LiveView: Dynamic Target-Centered MPI for View Synthesis

no code implementations11 Jul 2021 Sushobhan Ghosh, Zhaoyang Lv, Nathan Matsuda, Lei Xiao, Andrew Berkovich, Oliver Cossairt

Existing Multi-Plane Image (MPI) based view-synthesis methods generate an MPI aligned with the input view using a fixed number of planes in one forward pass.

Novel View Synthesis

Follow the Prophet: Accurate Online Conversion Rate Prediction in the Face of Delayed Feedback

1 code implementation13 Aug 2021 Haoming Li, Feiyang Pan, Xiang Ao, Zhao Yang, Min Lu, Junwei Pan, Dapeng Liu, Lei Xiao, Qing He

The delayed feedback problem is one of the imperative challenges in online advertising, which is caused by the highly diversified feedback delay of a conversion varying from a few minutes to several days.

View Synthesis of Dynamic Scenes based on Deep 3D Mask Volume

no code implementations ICCV 2021 Kai-En Lin, Guowei Yang, Lei Xiao, Feng Liu, Ravi Ramamoorthi

Image view synthesis has seen great success in reconstructing photorealistic visuals, thanks to deep learning and various novel representations.

NeuralPassthrough: Learned Real-Time View Synthesis for VR

1 code implementation5 Jul 2022 Lei Xiao, Salah Nouri, Joel Hegland, Alberto Garcia Garcia, Douglas Lanman

Virtual reality (VR) headsets provide an immersive, stereoscopic visual experience, but at the cost of blocking users from directly observing their physical environment.

Blocking Neural Rendering +1

AdaTask: A Task-aware Adaptive Learning Rate Approach to Multi-task Learning

no code implementations28 Nov 2022 Enneng Yang, Junwei Pan, Ximei Wang, Haibin Yu, Li Shen, Xihua Chen, Lei Xiao, Jie Jiang, Guibing Guo

In this paper, we propose to measure the task dominance degree of a parameter by the total updates of each task on this parameter.

Multi-Task Learning Recommendation Systems

Multimodal High-order Relation Transformer for Scene Boundary Detection

no code implementations ICCV 2023 Xi Wei, Zhangxiang Shi, Tianzhu Zhang, Xiaoyuan Yu, Lei Xiao

Scene boundary detection breaks down long videos into meaningful story-telling units and plays a crucial role in high-level video understanding.

Boundary Detection Relation +1

AlteredAvatar: Stylizing Dynamic 3D Avatars with Fast Style Adaptation

no code implementations30 May 2023 Thu Nguyen-Phuoc, Gabriel Schwartz, Yuting Ye, Stephen Lombardi, Lei Xiao

Among existing approaches for avatar stylization, direct optimization methods can produce excellent results for arbitrary styles but they are unpleasantly slow.

Meta-Learning

AutoPCF: Efficient Product Carbon Footprint Accounting with Large Language Models

no code implementations8 Aug 2023 Zhu Deng, Jinjie Liu, Biao Luo, Can Yuan, Qingrun Yang, Lei Xiao, Wenwen Zhou, Zhu Liu

The product carbon footprint (PCF) is crucial for decarbonizing the supply chain, as it measures the direct and indirect greenhouse gas emissions caused by all activities during the product's life cycle.

Tiled Multiplane Images for Practical 3D Photography

no code implementations ICCV 2023 Numair Khan, Douglas Lanman, Lei Xiao

Based on the observation that the depth complexity in local image regions is lower than that over the entire image, we split an MPI into many small, tiled regions, each with only a few depth planes.

GauFRe: Gaussian Deformation Fields for Real-time Dynamic Novel View Synthesis

no code implementations18 Dec 2023 Yiqing Liang, Numair Khan, Zhengqin Li, Thu Nguyen-Phuoc, Douglas Lanman, James Tompkin, Lei Xiao

We propose a method for dynamic scene reconstruction using deformable 3D Gaussians that is tailored for monocular video.

Novel View Synthesis

ESGReveal: An LLM-based approach for extracting structured data from ESG reports

no code implementations25 Dec 2023 Yi Zou, Mengying Shi, Zhongjie Chen, Zhu Deng, ZongXiong Lei, Zihan Zeng, Shiming Yang, HongXiang Tong, Lei Xiao, Wenwen Zhou

ESGReveal is an innovative method proposed for efficiently extracting and analyzing Environmental, Social, and Governance (ESG) data from corporate reports, catering to the critical need for reliable ESG information retrieval.

Information Retrieval Retrieval

Pareto-based Multi-Objective Recommender System with Forgetting Curve

no code implementations28 Dec 2023 Jipeng Jin, Zhaoxiang Zhang, Zhiheng Li, Xiaofeng Gao, Xiongwen Yang, Lei Xiao, Jie Jiang

Considering recency effect in memories, we propose a forgetting model based on Ebbinghaus Forgetting Curve to cope with negative feedback.

Recommendation Systems

TextureDreamer: Image-guided Texture Synthesis through Geometry-aware Diffusion

no code implementations17 Jan 2024 Yu-Ying Yeh, Jia-Bin Huang, Changil Kim, Lei Xiao, Thu Nguyen-Phuoc, Numair Khan, Cheng Zhang, Manmohan Chandraker, Carl S Marshall, Zhao Dong, Zhengqin Li

In contrast, TextureDreamer can transfer highly detailed, intricate textures from real-world environments to arbitrary objects with only a few casually captured images, potentially significantly democratizing texture creation.

Texture Synthesis

ReplaceAnything3D:Text-Guided 3D Scene Editing with Compositional Neural Radiance Fields

no code implementations31 Jan 2024 Edward Bartrum, Thu Nguyen-Phuoc, Chris Xie, Zhengqin Li, Numair Khan, Armen Avetisyan, Douglas Lanman, Lei Xiao

We introduce ReplaceAnything3D model (RAM3D), a novel text-guided 3D scene editing method that enables the replacement of specific objects within a scene.

3D scene Editing Object

Ad Recommendation in a Collapsed and Entangled World

no code implementations22 Feb 2024 Junwei Pan, Wei Xue, Ximei Wang, Haibin Yu, Xun Liu, Shijie Quan, Xueming Qiu, Dapeng Liu, Lei Xiao, Jie Jiang

In this paper, we present an industry ad recommendation system, paying attention to the challenges and practices of learning appropriate representations.

Feature Correlation Model Optimization

Understanding the Ranking Loss for Recommendation with Sparse User Feedback

1 code implementation21 Mar 2024 Zhutian Lin, Junwei Pan, Shangyu Zhang, Ximei Wang, Xi Xiao, Shudong Huang, Lei Xiao, Jie Jiang

In this paper, we uncover a new challenge associated with BCE loss in scenarios with sparse positive feedback, such as CTR prediction: the gradient vanishing for negative samples.

Binary Classification Click-Through Rate Prediction

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