Search Results for author: Lili Meng

Found 21 papers, 6 papers with code

Where and when to look? Spatial-temporal attention for action recognition in videos

no code implementations ICLR 2019 Lili Meng, Bo Zhao, Bo Chang, Gao Huang, Frederick Tung, Leonid Sigal

Our model is efficient, as it proposes a separable spatio-temporal mechanism for video attention, while being able to identify important parts of the video both spatially and temporally.

Action Recognition In Videos Temporal Action Localization +1

ConR: Contrastive Regularizer for Deep Imbalanced Regression

1 code implementation13 Sep 2023 Mahsa Keramati, Lili Meng, R. David Evans

ConR addresses the continuous nature of label space with two main strategies in a contrastive manner: incorrect proximities are penalized proportionate to the label similarities and the correct ones are encouraged to model local similarities.

regression

What Constitutes Good Contrastive Learning in Time-Series Forecasting?

no code implementations21 Jun 2023 Chiyu Zhang, Qi Yan, Lili Meng, Tristan Sylvain

Despite these advances, there remains a significant gap in understanding the impact of different SSCL strategies on time series forecasting performance, as well as the specific benefits that SSCL can bring.

Contrastive Learning Representation Learning +2

GAN-based Image Compression with Improved RDO Process

no code implementations18 Jun 2023 Fanxin Xia, Jian Jin, Lili Meng, Feng Ding, Huaxiang Zhang

GAN-based image compression schemes have shown remarkable progress lately due to their high perceptual quality at low bit rates.

Image Compression MS-SSIM +1

Robust Reinforcement Learning Objectives for Sequential Recommender Systems

no code implementations30 May 2023 Melissa Mozifian, Tristan Sylvain, Dave Evans, Lili Meng

Attention-based sequential recommendation methods have demonstrated promising results by accurately capturing users' dynamic interests from historical interactions.

Offline RL reinforcement-learning +2

JND-Based Perceptual Optimization For Learned Image Compression

no code implementations25 Feb 2023 Feng Ding, Jian Jin, Lili Meng, Weisi Lin

After combining them together, we can better assign the distortion in the compressed image with the guidance of JND to preserve the high perceptual quality.

Image Compression MS-SSIM +2

HVS-Inspired Signal Degradation Network for Just Noticeable Difference Estimation

1 code implementation16 Aug 2022 Jian Jin, Yuan Xue, Xingxing Zhang, Lili Meng, Yao Zhao, Weisi Lin

However, they have a major drawback that the generated JND is assessed in the real-world signal domain instead of in the perceptual domain in the human brain.

Scaleformer: Iterative Multi-scale Refining Transformers for Time Series Forecasting

1 code implementation8 Jun 2022 Amin Shabani, Amir Abdi, Lili Meng, Tristan Sylvain

The performance of time series forecasting has recently been greatly improved by the introduction of transformers.

Time Series Time Series Forecasting

Full RGB Just Noticeable Difference (JND) Modelling

no code implementations1 Mar 2022 Jian Jin, Dong Yu, Weisi Lin, Lili Meng, Hao Wang, Huaxiang Zhang

Besides, the JND of the red and blue channels are larger than that of the green one according to the experimental results of the proposed model, which demonstrates that more changes can be tolerated in the red and blue channels, in line with the well-known fact that the human visual system is more sensitive to the green channel in comparison with the red and blue ones.

Image Quality Assessment

Auto-Weighted Layer Representation Based View Synthesis Distortion Estimation for 3-D Video Coding

no code implementations7 Jan 2022 Jian Jin, Xingxing Zhang, Lili Meng, Weisi Lin, Jie Liang, Huaxiang Zhang, Yao Zhao

Experimental results show that the VSD can be accurately estimated with the weights learnt by the nonlinear mapping function once its associated S-VSDs are available.

A New Image Codec Paradigm for Human and Machine Uses

no code implementations19 Dec 2021 Sien Chen, Jian Jin, Lili Meng, Weisi Lin, Zhuo Chen, Tsui-Shan Chang, Zhengguang Li, Huaxiang Zhang

Meanwhile, an image predictor is designed and trained to achieve the general-quality image reconstruction with the 16-bit gray-scale profile and signal features.

Decision Making Image Compression +8

Continuous Graph Flow

no code implementations7 Aug 2019 Zhiwei Deng, Megha Nawhal, Lili Meng, Greg Mori

In this paper, we propose Continuous Graph Flow, a generative continuous flow based method that aims to model complex distributions of graph-structured data.

Density Estimation Graph Generation

Image Generation from Layout

no code implementations CVPR 2019 Bo Zhao, Lili Meng, Weidong Yin, Leonid Sigal

The representation of each object is disentangled into a specified/certain part (category) and an unspecified/uncertain part (appearance).

Layout-to-Image Generation Object

Interpretable Spatio-temporal Attention for Video Action Recognition

no code implementations1 Oct 2018 Lili Meng, Bo Zhao, Bo Chang, Gao Huang, Wei Sun, Frederich Tung, Leonid Sigal

Inspired by the observation that humans are able to process videos efficiently by only paying attention where and when it is needed, we propose an interpretable and easy plug-in spatial-temporal attention mechanism for video action recognition.

Action Recognition Temporal Action Localization

Generating Handwritten Chinese Characters using CycleGAN

3 code implementations25 Jan 2018 Bo Chang, Qiong Zhang, Shenyi Pan, Lili Meng

Our method is applied not only to commonly used Chinese characters but also to calligraphy work with aesthetic values.

Exploiting Points and Lines in Regression Forests for RGB-D Camera Relocalization

no code implementations28 Oct 2017 Lili Meng, Frederick Tung, James J. Little, Julien Valentin, Clarence de Silva

Camera relocalization plays a vital role in many robotics and computer vision tasks, such as global localization, recovery from tracking failure and loop closure detection.

Camera Relocalization Loop Closure Detection +1

Multi-level Residual Networks from Dynamical Systems View

no code implementations ICLR 2018 Bo Chang, Lili Meng, Eldad Haber, Frederick Tung, David Begert

Deep residual networks (ResNets) and their variants are widely used in many computer vision applications and natural language processing tasks.

General Classification Image Classification

Backtracking Regression Forests for Accurate Camera Relocalization

1 code implementation22 Oct 2017 Lili Meng, Jianhui Chen, Frederick Tung, James J. Little, Julien Valentin, Clarence W. de Silva

Camera relocalization plays a vital role in many robotics and computer vision tasks, such as global localization, recovery from tracking failure, and loop closure detection.

Camera Relocalization Loop Closure Detection +2

Reversible Architectures for Arbitrarily Deep Residual Neural Networks

2 code implementations12 Sep 2017 Bo Chang, Lili Meng, Eldad Haber, Lars Ruthotto, David Begert, Elliot Holtham

In this work, we interpret deep residual networks as ordinary differential equations (ODEs), which have long been studied in mathematics and physics with rich theoretical and empirical success.

Image Classification

Local Activity-tuned Image Filtering for Noise Removal and Image Smoothing

no code implementations9 Jul 2017 Lijun Zhao, Jie Liang, Huihui Bai, Lili Meng, Anhong Wang, Yao Zhao

Both frameworks employ the division of gradient and the local activity measurement to achieve noise removal.

Image Denoising image smoothing

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