Search Results for author: Chao Zhou

Found 36 papers, 8 papers with code

©Plug-in Authorization for Human Content Copyright Protection in Text-to-Image Model

no code implementations18 Apr 2024 Chao Zhou, Huishuai Zhang, Jiang Bian, Weiming Zhang, Nenghai Yu

To mitigate this, we propose the \copyright Plug-in Authorization framework, introducing three operations: addition, extraction, and combination.

Convergence analysis of controlled particle systems arising in deep learning: from finite to infinite sample size

no code implementations8 Apr 2024 Huafu Liao, Alpár R. Mészáros, Chenchen Mou, Chao Zhou

Using these uniform regularity results, we show the convergence of the minima of objective functionals and optimal parameters of the neural SDEs as the sample size N tends to infinity.

CasSR: Activating Image Power for Real-World Image Super-Resolution

no code implementations18 Mar 2024 Haolan Chen, Jinhua Hao, Kai Zhao, Kun Yuan, Ming Sun, Chao Zhou, Wei Hu

In particular, we develop a cascaded controllable diffusion model that aims to optimize the extraction of information from low-resolution images.

Image Restoration Image Super-Resolution

CPGA: Coding Priors-Guided Aggregation Network for Compressed Video Quality Enhancement

no code implementations15 Mar 2024 Qiang Zhu, Jinhua Hao, Yukang Ding, Yu Liu, Qiao Mo, Ming Sun, Chao Zhou, Shuyuan Zhu

Specifically, the ITA module aggregates temporal information from consecutive frames and coding priors, while the MNA module globally captures spatial information guided by residual frames.

XPSR: Cross-modal Priors for Diffusion-based Image Super-Resolution

no code implementations8 Mar 2024 Yunpeng Qu, Kun Yuan, Kai Zhao, Qizhi Xie, Jinhua Hao, Ming Sun, Chao Zhou

Diffusion-based methods, endowed with a formidable generative prior, have received increasing attention in Image Super-Resolution (ISR) recently.

Image Super-Resolution

KVQ: Kwai Video Quality Assessment for Short-form Videos

1 code implementation11 Feb 2024 Yiting Lu, Xin Li, Yajing Pei, Kun Yuan, Qizhi Xie, Yunpeng Qu, Ming Sun, Chao Zhou, Zhibo Chen

Short-form UGC video platforms, like Kwai and TikTok, have been an emerging and irreplaceable mainstream media form, thriving on user-friendly engagement, and kaleidoscope creation, etc.

Video Quality Assessment Visual Question Answering (VQA)

Decoding Mean Field Games from Population and Environment Observations By Gaussian Processes

no code implementations8 Dec 2023 Jinyan Guo, Chenchen Mou, Xianjin Yang, Chao Zhou

This paper presents a Gaussian Process (GP) framework, a non-parametric technique widely acknowledged for regression and classification tasks, to address inverse problems in mean field games (MFGs).

Gaussian Processes regression

Forecasting Volatility with Machine Learning and Rough Volatility: Example from the Crypto-Winter

no code implementations8 Nov 2023 Siu Hin Tang, Mathieu Rosenbaum, Chao Zhou

We extend the application and test the performance of a recently introduced volatility prediction framework encompassing LSTM and rough volatility.

Feature Space Renormalization for Semi-supervised Learning

no code implementations7 Nov 2023 Jun Sun, Zhongjie Mao, Chao Li, Chao Zhou, Xiao-Jun Wu

The common framework among recent approaches is to train the model on a large amount of unlabelled data with consistency regularization to constrain the model predictions to be invariant to input perturbation.

Dimension Independent Mixup for Hard Negative Sample in Collaborative Filtering

1 code implementation28 Jun 2023 Xi Wu, Liangwei Yang, Jibing Gong, Chao Zhou, Tianyu Lin, Xiaolong Liu, Philip S. Yu

To address this limitation, we propose Dimension Independent Mixup for Hard Negative Sampling (DINS), which is the first Area-wise sampling method for training CF-based models.

Collaborative Filtering

Robust Equilibrium Strategy for Mean-Variance Portfolio Selection

no code implementations11 May 2023 Mengge Li, Shuaijie Qian, Chao Zhou

Under our definition, a classical solution to the corresponding PDE system implies a robust equilibrium strategy.

OcTr: Octree-based Transformer for 3D Object Detection

no code implementations CVPR 2023 Chao Zhou, Yanan Zhang, Jiaxin Chen, Di Huang

A key challenge for LiDAR-based 3D object detection is to capture sufficient features from large scale 3D scenes especially for distant or/and occluded objects.

3D Object Detection Object +1

Paraphrase Identification with Deep Learning: A Review of Datasets and Methods

no code implementations13 Dec 2022 Chao Zhou, Cheng Qiu, Daniel E. Acuna

The rapid advancement of AI technology has made text generation tools like GPT-3 and ChatGPT increasingly accessible, scalable, and effective.

Paraphrase Identification Text Generation

Object-Attentional Untargeted Adversarial Attack

no code implementations16 Oct 2022 Chao Zhou, Yuan-Gen Wang, Guopu Zhu

Specifically, we first generate an object region by intersecting the object detection region from YOLOv4 with the salient object detection (SOD) region from HVPNet.

Adversarial Attack Object +3

Robust control problems of BSDEs coupled with value functions

no code implementations23 Aug 2022 Zhou Yang, Jing Zhang, Chao Zhou

A robust control problem is considered in this paper, where the controlled stochastic differential equations (SDEs) include ambiguity parameters and their coefficients satisfy non-Lipschitz continuous and non-linear growth conditions, the objective function is expressed as a backward stochastic differential equation (BSDE) with the generator depending on the value function.

Power Forward Performance in Semimartingale Markets with Stochastic Integrated Factors

no code implementations24 Jan 2022 Lijun Bo, Agostino Capponi, Chao Zhou

We study the forward investment performance process (FIPP) in an incomplete semimartingale market model with closed and convex portfolio constraints, when the investor's risk preferences are of the power form.

Robust lEarned Shrinkage-Thresholding (REST): Robust unrolling for sparse recover

no code implementations20 Oct 2021 Wei Pu, Chao Zhou, Yonina C. Eldar, Miguel R. D. Rodrigues

In this paper, we consider deep neural networks for solving inverse problems that are robust to forward model mis-specifications.

Compressive Sensing Rolling Shutter Correction

Mean Field Portfolio Games

no code implementations11 Jun 2021 Guanxing Fu, Chao Zhou

We study mean field portfolio games with random market parameters, where each player is concerned with not only her own wealth but also relative performance to her competitors.

The Discovery of Dynamics via Linear Multistep Methods and Deep Learning: Error Estimation

1 code implementation21 Mar 2021 Qiang Du, Yiqi Gu, Haizhao Yang, Chao Zhou

We put forward error estimates for these methods using the approximation property of deep networks.

Relative wealth concerns with partial information and heterogeneous priors

no code implementations23 Jul 2020 Chao Deng, Xizhi Su, Chao Zhou

We observe that the agent with the most accurate prior estimate is likely to lead the herd, and the effect of competition on heterogeneous agents varies more with market characteristics compared to the homogeneous case.

Hyperspectral Unmixing Network Inspired by Unfolding an Optimization Problem

no code implementations21 May 2020 Chao Zhou

We first consider a linear mixture model with sparsity constraint, then we unfold Alternating Direction Method of Multipliers (ADMM) algorithm to construct the unmixing network structures.

Hyperspectral Unmixing

Deep learning for smart fish farming: applications, opportunities and challenges

no code implementations6 Apr 2020 Xinting Yang, Song Zhang, Jintao Liu, Qinfeng Gao, Shuanglin Dong, Chao Zhou

This change can create new opportunities and a series of challenges for information and data processing in smart fish farming.

Decision Making

Balance Between Efficient and Effective Learning: Dense2Sparse Reward Shaping for Robot Manipulation with Environment Uncertainty

no code implementations5 Mar 2020 Yongle Luo, Kun Dong, Lili Zhao, Zhiyong Sun, Chao Zhou, Bo Song

The experiment results show that the Dense2Sparse method obtained higher expected reward compared with the ones using standalone dense reward or sparse reward, and it also has a superior tolerance of system uncertainty.

Robot Manipulation

Lifetime Ruin under High-watermark Fees and Drift Uncertainty

no code implementations3 Sep 2019 Junbeom Lee, Xiang Yu, Chao Zhou

This paper aims to make a new contribution to the study of lifetime ruin problem by considering investment in two hedge funds with high-watermark fees and drift uncertainty.

Dimensionality Reduction Vocal Bursts Intensity Prediction

Comyco: Quality-Aware Adaptive Video Streaming via Imitation Learning

1 code implementation6 Aug 2019 Tianchi Huang, Chao Zhou, Rui-Xiao Zhang, Chenglei Wu, Xin Yao, Lifeng Sun

Using trace-driven and real-world experiments, we demonstrate significant improvements of Comyco's sample efficiency in comparison to prior work, with 1700x improvements in terms of the number of samples required and 16x improvements on training time required.

Imitation Learning

Portfolio diversification and model uncertainty: a robust dynamic mean-variance approach

no code implementations5 Sep 2018 Huyen Pham, Xiaoli Wei, Chao Zhou

The dynamic setting allows us to consider time varying ambiguity sets, which include the cases where the drift and correlation are estimated on a rolling window of historical data or when the investor takes into account learning on the ambiguity.

Pressure Predictions of Turbine Blades with Deep Learning

no code implementations12 Jun 2018 Cheng'an Bai, Chao Zhou

Deep learning has been used in many areas, such as feature detections in images and the game of go.

Game of Go

Unsupervised Learning of Stereo Matching

no code implementations ICCV 2017 Chao Zhou, Hong Zhang, Xiaoyong Shen, Jiaya Jia

However, due to the limitations of these datasets and the difficulty of collecting new stereo data, current methods fail in real-life cases.

Stereo Matching Stereo Matching Hand

Zero-order Reverse Filtering

1 code implementation ICCV 2017 Xin Tao, Chao Zhou, Xiaoyong Shen, Jue Wang, Jiaya Jia

In this paper, we study an unconventional but practically meaningful reversibility problem of commonly used image filters.

High-Quality Correspondence and Segmentation Estimation for Dual-Lens Smart-Phone Portraits

no code implementations ICCV 2017 Xiaoyong Shen, Hongyun Gao, Xin Tao, Chao Zhou, Jiaya Jia

Estimating correspondence between two images and extracting the foreground object are two challenges in computer vision.

Binary Funding Impacts in Derivative Valuation

no code implementations1 Mar 2017 Junbeom Lee, Chao Zhou

It is often believed that considering both DVA and funding benefits results in a double-counting issue but it will be shown that the two components are affected by different mathematical structures of derivative transactions.

Mutual-Structure for Joint Filtering

no code implementations ICCV 2015 Xiaoyong Shen, Chao Zhou, Li Xu, Jiaya Jia

Previous joint/guided filters directly transfer the structural information in the reference image to the target one.

Depth Completion Image Enhancement +3

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