Search Results for author: Sheng Liu

Found 28 papers, 13 papers with code

Recovering Sign Bits of DCT Coefficients in Digital Images as an Optimization Problem

no code implementations2 Nov 2022 Ruiyuan Lin, Sheng Liu, Jun Jiang, Shujun Li, Chengqing Li, C. -C. Jay Kuo

Recovering unknown, missing, damaged, distorted or lost information in DCT coefficients is a common task in multiple applications of digital image processing, including image compression, selective image encryption, and image communications.

Image Compression SSIM

Are All Losses Created Equal: A Neural Collapse Perspective

no code implementations4 Oct 2022 Jinxin Zhou, Chong You, Xiao Li, Kangning Liu, Sheng Liu, Qing Qu, Zhihui Zhu

We extend such results and show through global solution and landscape analyses that a broad family of loss functions including commonly used label smoothing (LS) and focal loss (FL) exhibits Neural Collapse.

Asymmetric Dual-Decoder U-Net for Joint Rain and Haze Removal

no code implementations14 Jun 2022 Yuan Feng, Yaojun Hu, Pengfei Fang, Yanhong Yang, Sheng Liu, ShengYong Chen

However, jointly removing the rain and haze in scene images is ill-posed and challenging, where the existence of haze and rain and the change of atmosphere light, can both degrade the scene information.

Autonomous Driving

Parotid Gland MRI Segmentation Based on Swin-Unet and Multimodal Images

no code implementations7 Jun 2022 Yin Dai, Zi'an Xu, Fayu Liu, Siqi Li, Sheng Liu, Lifu Shi, Jun Fu

Preoperative tumor localization, differential diagnosis, and subsequent selection of appropriate treatment for parotid gland tumors is critical.

MRI segmentation

Depth-Guided Sparse Structure-from-Motion for Movies and TV Shows

1 code implementation CVPR 2022 Sheng Liu, Xiaohan Nie, Raffay Hamid

We demonstrate that our approach: (a) significantly improves the quality of 3-D reconstruction for our small-parallax setting, (b) does not cause any degradation for data with large-parallax, and (c) maintains the generalizability and scalability of geometry-based sparse SfM.

On Learning Contrastive Representations for Learning with Noisy Labels

1 code implementation CVPR 2022 Li Yi, Sheng Liu, Qi She, A. Ian McLeod, Boyu Wang

To address this issue, we focus on learning robust contrastive representations of data on which the classifier is hard to memorize the label noise under the CE loss.

Learning with noisy labels Memorization +1

Robust Training under Label Noise by Over-parameterization

1 code implementation28 Feb 2022 Sheng Liu, Zhihui Zhu, Qing Qu, Chong You

In this work, we propose a principled approach for robust training of over-parameterized deep networks in classification tasks where a proportion of training labels are corrupted.

Learning with noisy labels

Uncertainty Detection and Reduction in Neural Decoding of EEG Signals

1 code implementation28 Dec 2021 Tiehang Duan, Zhenyi Wang, Sheng Liu, Sargur N. Srihari, Hui Yang

In this work, we proposed an uncertainty estimation and reduction model (UNCER) to quantify and mitigate the uncertainty during the EEG decoding process.

Data Augmentation Decision Making +1

Deep Probability Estimation

no code implementations21 Nov 2021 Sheng Liu, Aakash Kaku, Weicheng Zhu, Matan Leibovich, Sreyas Mohan, Boyang Yu, Haoxiang Huang, Laure Zanna, Narges Razavian, Jonathan Niles-Weed, Carlos Fernandez-Granda

Reliable probability estimation is of crucial importance in many real-world applications where there is inherent (aleatoric) uncertainty.

Autonomous Vehicles Weather Forecasting

Adaptive Early-Learning Correction for Segmentation from Noisy Annotations

2 code implementations CVPR 2022 Sheng Liu, Kangning Liu, Weicheng Zhu, Yiqiu Shen, Carlos Fernandez-Granda

We discover a phenomenon that has been previously reported in the context of classification: the networks tend to first fit the clean pixel-level labels during an "early-learning" phase, before eventually memorizing the false annotations.

Classification Medical Image Segmentation +4

Few-Shot Fine-Grained Action Recognition via Bidirectional Attention and Contrastive Meta-Learning

1 code implementation15 Aug 2021 Jiahao Wang, Yunhong Wang, Sheng Liu, Annan Li

Fine-grained action recognition is attracting increasing attention due to the emerging demand of specific action understanding in real-world applications, whereas the data of rare fine-grained categories is very limited.

Action Understanding Fine-grained Action Recognition +1

Multi-modal and frequency-weighted tensor nuclear norm for hyperspectral image denoising

no code implementations23 Jun 2021 Xiaozhen Xie, Sheng Liu

In this paper, we propose the multi-modal and frequency-weighted tensor nuclear norm (MFWTNN) and the non-convex MFWTNN for HSI denoising tasks.

Hyperspectral Image Denoising Image Denoising

Convolutional Normalization: Improving Deep Convolutional Network Robustness and Training

1 code implementation NeurIPS 2021 Sheng Liu, Xiao Li, Yuexiang Zhai, Chong You, Zhihui Zhu, Carlos Fernandez-Granda, Qing Qu

Furthermore, we show that our ConvNorm can reduce the layerwise spectral norm of the weight matrices and hence improve the Lipschitzness of the network, leading to easier training and improved robustness for deep ConvNets.

Hyperspectral Image Denoising via Multi-modal and Double-weighted Tensor Nuclear Norm

no code implementations19 Jan 2021 Sheng Liu, Xiaozhen Xie, Wenfeng Kong

In the Fourier transform domain of HSIs, different frequency slices (FS) contain different information; different singular values (SVs) of each FS also represent different information.

Hyperspectral Image Denoising Image Denoising +1

Adversarial Multiscale Feature Learning for Overlapping Chromosome Segmentation

1 code implementation22 Dec 2020 Liye Mei, Yalan Yu, Yueyun Weng, Xiaopeng Guo, Yan Liu, Du Wang, Sheng Liu, Fuling Zhou, Cheng Lei

Since manual analysis is highly time and effort consuming, computer-assisted automatic chromosome karyotype analysis based on images is routinely used to improve the efficiency and accuracy of the analysis.

Urban Bike Lane Planning with Bike Trajectories: Models, Algorithms, and a Real-World Case Study

no code implementations21 Aug 2020 Sheng Liu, Zuo-Jun Max Shen, Xiang Ji

We formalize the bike lane planning problem in view of the cyclists' utility functions and derive an integer optimization model to maximize the utility.

Management

Early-Learning Regularization Prevents Memorization of Noisy Labels

2 code implementations NeurIPS 2020 Sheng Liu, Jonathan Niles-Weed, Narges Razavian, Carlos Fernandez-Granda

In contrast with existing approaches, which use the model output during early learning to detect the examples with clean labels, and either ignore or attempt to correct the false labels, we take a different route and instead capitalize on early learning via regularization.

General Classification Learning with noisy labels +1

Towards Understanding the Adversarial Vulnerability of Skeleton-based Action Recognition

no code implementations14 May 2020 Tianhang Zheng, Sheng Liu, Changyou Chen, Junsong Yuan, Baochun Li, Kui Ren

We first formulate generation of adversarial skeleton actions as a constrained optimization problem by representing or approximating the physiological and physical constraints with mathematical formulations.

Action Recognition Skeleton Based Action Recognition

Machine Discovery of Partial Differential Equations from Spatiotemporal Data

1 code implementation15 Sep 2019 Ye Yuan, Junlin Li, Liang Li, Frank Jiang, Xiuchuan Tang, Fumin Zhang, Sheng Liu, Jorge Goncalves, Henning U. Voss, Xiuting Li, Jürgen Kurths, Han Ding

The study presents a general framework for discovering underlying Partial Differential Equations (PDEs) using measured spatiotemporal data.

Sparse Recovery Beyond Compressed Sensing: Separable Nonlinear Inverse Problems

no code implementations12 May 2019 Brett Bernstein, Sheng Liu, Chrysa Papadaniil, Carlos Fernandez-Granda

In this work, we consider separable inverse problems, where the data are modeled as a linear combination of functions that depend nonlinearly on certain parameters of interest.

Geophysics

Time-Series Analysis via Low-Rank Matrix Factorization Applied to Infant-Sleep Data

no code implementations9 Apr 2019 Sheng Liu, Mark Cheng, Hayley Brooks, Wayne Mackey, David J. Heeger, Esteban G. Tabak, Carlos Fernandez-Granda

We apply our methodology to detect anomalous individuals, to cluster the cohort into groups with different sleeping tendencies, and to obtain improved predictions of future sleep behavior.

Time Series Time Series Analysis

Discovering Influential Factors in Variational Autoencoder

1 code implementation6 Sep 2018 Shiqi Liu, Jingxin Liu, Qian Zhao, Xiangyong Cao, Huibin Li, Hongy-ing Meng, Sheng Liu, Deyu Meng

In the field of machine learning, it is still a critical issue to identify and supervise the learned representation without manually intervening or intuition assistance to extract useful knowledge or serve for the downstream tasks.

General Classification

Defect detection for patterned fabric images based on GHOG and low-rank decomposition

no code implementations18 Feb 2017 Chunlei Li, Guangshuai Gao, Zhoufeng Liu, Di Huang, Sheng Liu, Miao Yu

In order to accurately detect defects in patterned fabric images, a novel detection algorithm based on Gabor-HOG (GHOG) and low-rank decomposition is proposed in this paper.

Defect Detection

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