Search Results for author: Li Ma

Found 53 papers, 20 papers with code

Survey of Video Diffusion Models: Foundations, Implementations, and Applications

no code implementations22 Apr 2025 Yimu Wang, Xuye Liu, Wei Pang, Li Ma, Shuai Yuan, Paul Debevec, Ning Yu

Recent advances in diffusion models have revolutionized video generation, offering superior temporal consistency and visual quality compared to traditional generative adversarial networks-based approaches.

Computational Efficiency Denoising +4

FreSca: Unveiling the Scaling Space in Diffusion Models

no code implementations2 Apr 2025 Chao Huang, Susan Liang, Yunlong Tang, Li Ma, Yapeng Tian, Chenliang Xu

Diffusion models offer impressive controllability for image tasks, primarily through noise predictions that encode task-specific information and classifier-free guidance enabling adjustable scaling.

Depth Estimation

Lux Post Facto: Learning Portrait Performance Relighting with Conditional Video Diffusion and a Hybrid Dataset

no code implementations18 Mar 2025 Yiqun Mei, Mingming He, Li Ma, Julien Philip, Wenqi Xian, David M George, Xueming Yu, Gabriel Dedic, Ahmet Levent Taşel, Ning Yu, Vishal M. Patel, Paul Debevec

In this work, we introduce Lux Post Facto, a novel portrait video relighting method that produces both photorealistic and temporally consistent lighting effects.

Go-with-the-Flow: Motion-Controllable Video Diffusion Models Using Real-Time Warped Noise

3 code implementations14 Jan 2025 Ryan Burgert, Yuancheng Xu, Wenqi Xian, Oliver Pilarski, Pascal Clausen, Mingming He, Li Ma, Yitong Deng, Lingxiao Li, Mohsen Mousavi, Michael Ryoo, Paul Debevec, Ning Yu

The efficiency of our algorithm enables us to fine-tune modern video diffusion base models using warped noise with minimal overhead, and provide a one-stop solution for a wide range of user-friendly motion control: local object motion control, global camera movement control, and motion transfer.

Optical Flow Estimation

A partial likelihood approach to tree-based density modeling and its application in Bayesian inference

no code implementations16 Dec 2024 Li Ma, Benedetta Bruni

Tree-based priors for probability distributions are usually specified using a predetermined, data-independent collection of candidate recursive partitions of the sample space.

Bayesian Inference Computational Efficiency +1

Fitting Spherical Gaussians to Dynamic HDRI Sequences

no code implementations9 Dec 2024 Pascal Clausen, Li Ma, Mingming He, Ahmet Levent Tasel, Oliver Pilarski, Paul Debevec

We present a technique for fitting high dynamic range illumination (HDRI) sequences using anisotropic spherical Gaussians (ASGs) while preserving temporal consistency in the compressed HDRI maps.

Boosting 3D Object Generation through PBR Materials

no code implementations25 Nov 2024 Yitong Wang, Xudong Xu, Li Ma, Haoran Wang, Bo Dai

By analyzing the components of PBR materials, we choose to consider albedo, roughness, metalness, and bump maps.

Object

Stream-level flow matching with Gaussian processes

1 code implementation30 Sep 2024 Ganchao Wei, Li Ma

Conditional flow matching (CFM) exploits the fact that the marginal vector field of a CNF can be learned by fitting least-squares regression to the conditional vector field specified given one or both ends of the flow path.

Gaussian Processes Time Series

Fisheye-GS: Lightweight and Extensible Gaussian Splatting Module for Fisheye Cameras

1 code implementation7 Sep 2024 Zimu Liao, Siyan Chen, Rong Fu, Yi Wang, Zhongling Su, Hao Luo, Li Ma, Linning Xu, Bo Dai, Hengjie Li, Zhilin Pei, Xingcheng Zhang

However, adapting 3DGS to different camera models, particularly fisheye lenses, poses challenges due to the unique 3D to 2D projection calculation.

3DGS

EA-RAS: Towards Efficient and Accurate End-to-End Reconstruction of Anatomical Skeleton

no code implementations3 Sep 2024 Zhiheng Peng, Kai Zhao, Xiaoran Chen, Li Ma, Siyu Xia, Changjie Fan, Weijian Shang, Wei Jing

In this work, we also develop a progressive training strategy and integrated it with an enhanced optimization process, enabling the network to obtain initial weights using only a small skin dataset and achieve self-supervision in skeleton reconstruction.

Histology Virtual Staining with Mask-Guided Adversarial Transfer Learning for Tertiary Lymphoid Structure Detection

no code implementations26 Aug 2024 Qiuli Wang, Yongxu Liu, Li Ma, Xianqi Wang, Wei Chen, Xiaohong Yao

Capitalizing on the prevalence of H&E staining slides, we introduce a novel Mask-Guided Adversarial Transfer Learning method designed for virtual pathological staining.

Specificity Transfer Learning +2

P/D-Serve: Serving Disaggregated Large Language Model at Scale

no code implementations15 Aug 2024 Yibo Jin, Tao Wang, Huimin Lin, Mingyang Song, Peiyang Li, Yipeng Ma, Yicheng Shan, Zhengfan Yuan, Cailong Li, Yajing Sun, Tiandeng Wu, Xing Chu, Ruizhi Huan, Li Ma, Xiao You, Wenting Zhou, Yunpeng Ye, Wen Liu, Xiangkun Xu, Yongsheng Zhang, Tiantian Dong, Jiawei Zhu, Zhe Wang, Xijian Ju, Jianxun Song, Haoliang Cheng, Xiaojing Li, Jiandong Ding, Hefei Guo, Zhengyong Zhang

To overcome previous problems, this paper proposes an end-to-end system P/D-Serve, complying with the paradigm of MLOps (machine learning operations), which models end-to-end (E2E) P/D performance and enables: 1) fine-grained P/D organization, mapping the service with RoCE (RDMA over converged ethernet) as needed, to facilitate similar processing and dynamic adjustments on P/D ratios; 2) on-demand forwarding upon rejections for idle prefill, decoupling the scheduler from regular inaccurate reports and local queues, to avoid timeouts in prefill; and 3) efficient KVCache transfer via optimized D2D access.

Language Modeling Language Modelling +1

Efficient Decision Trees for Tensor Regressions

no code implementations4 Aug 2024 Hengrui Luo, Akira Horiguchi, Li Ma

We proposed the tensor-input tree (TT) method for scalar-on-tensor and tensor-on-tensor regression problems.

regression

Establishing Rigorous and Cost-effective Clinical Trials for Artificial Intelligence Models

1 code implementation11 Jul 2024 Wanling Gao, Yunyou Huang, Dandan Cui, Zhuoming Yu, Wenjing Liu, Xiaoshuang Liang, Jiahui Zhao, Jiyue Xie, Hao Li, Li Ma, Ning Ye, Yumiao Kang, Dingfeng Luo, Peng Pan, Wei Huang, Zhongmou Liu, Jizhong Hu, Gangyuan Zhao, Chongrong Jiang, Fan Huang, Tianyi Wei, Suqin Tang, Bingjie Xia, Zhifei Zhang, Jianfeng Zhan

We envision DC-AI RCTs and VC-MedAI as pivotal advancements, presenting innovative and transformative evaluation methodologies for AI models in clinical practice, offering a preclinical-like setting mirroring conventional medicine, and reshaping development paradigms in a cost-effective and fast-iterative manner.

Turbo Sparse: Achieving LLM SOTA Performance with Minimal Activated Parameters

1 code implementation10 Jun 2024 Yixin Song, Haotong Xie, Zhengyan Zhang, Bo Wen, Li Ma, Zeyu Mi, Haibo Chen

By applying our neuron sparsification method to the Mistral and Mixtral models, only 2. 5 billion and 4. 3 billion parameters are activated per inference iteration, respectively, while achieving even more powerful model performance.

Mixture-of-Experts

Generative modeling of density regression through tree flows

no code implementations7 Jun 2024 Zhuoqun Wang, Naoki Awaya, Li Ma

A common objective in the analysis of tabular data is estimating the conditional distribution (in contrast to only producing predictions) of a set of "outcome" variables given a set of "covariates", which is sometimes referred to as the "density regression" problem.

regression

Experimental investigation of trans-scale displacement responses of wrinkle defects in fiber reinforced composite laminates

no code implementations21 May 2024 Li Ma, Shoulong Wang, Changchen Liu, Ange Wen, Kaidi Ying, Jing Guo

Wrinkle defects were found widely exist in the field of industrial products, i. e. wind turbine blades and filament-wound composite pressure vessels.

Sensitivity Decouple Learning for Image Compression Artifacts Reduction

no code implementations15 May 2024 Li Ma, Yifan Zhao, Peixi Peng, Yonghong Tian

Different from these methods, we propose to decouple the intrinsic attributes into two complementary features for artifacts reduction, ie, the compression-insensitive features to regularize the high-level semantic representations during training and the compression-sensitive features to be aware of the compression degree.

Image Compression

InternLM2 Technical Report

3 code implementations26 Mar 2024 Zheng Cai, Maosong Cao, Haojiong Chen, Kai Chen, Keyu Chen, Xin Chen, Xun Chen, Zehui Chen, Zhi Chen, Pei Chu, Xiaoyi Dong, Haodong Duan, Qi Fan, Zhaoye Fei, Yang Gao, Jiaye Ge, Chenya Gu, Yuzhe Gu, Tao Gui, Aijia Guo, Qipeng Guo, Conghui He, Yingfan Hu, Ting Huang, Tao Jiang, Penglong Jiao, Zhenjiang Jin, Zhikai Lei, Jiaxing Li, Jingwen Li, Linyang Li, Shuaibin Li, Wei Li, Yining Li, Hongwei Liu, Jiangning Liu, Jiawei Hong, Kaiwen Liu, Kuikun Liu, Xiaoran Liu, Chengqi Lv, Haijun Lv, Kai Lv, Li Ma, Runyuan Ma, Zerun Ma, Wenchang Ning, Linke Ouyang, Jiantao Qiu, Yuan Qu, FuKai Shang, Yunfan Shao, Demin Song, Zifan Song, Zhihao Sui, Peng Sun, Yu Sun, Huanze Tang, Bin Wang, Guoteng Wang, Jiaqi Wang, Jiayu Wang, Rui Wang, Yudong Wang, Ziyi Wang, Xingjian Wei, Qizhen Weng, Fan Wu, Yingtong Xiong, Chao Xu, Ruiliang Xu, Hang Yan, Yirong Yan, Xiaogui Yang, Haochen Ye, Huaiyuan Ying, JIA YU, Jing Yu, Yuhang Zang, Chuyu Zhang, Li Zhang, Pan Zhang, Peng Zhang, Ruijie Zhang, Shuo Zhang, Songyang Zhang, Wenjian Zhang, Wenwei Zhang, Xingcheng Zhang, Xinyue Zhang, Hui Zhao, Qian Zhao, Xiaomeng Zhao, Fengzhe Zhou, Zaida Zhou, Jingming Zhuo, Yicheng Zou, Xipeng Qiu, Yu Qiao, Dahua Lin

The evolution of Large Language Models (LLMs) like ChatGPT and GPT-4 has sparked discussions on the advent of Artificial General Intelligence (AGI).

4k Long-Context Understanding

UV Gaussians: Joint Learning of Mesh Deformation and Gaussian Textures for Human Avatar Modeling

no code implementations18 Mar 2024 Yujiao Jiang, Qingmin Liao, Xiaoyu Li, Li Ma, Qi Zhang, Chaopeng Zhang, Zongqing Lu, Ying Shan

Therefore, we propose UV Gaussians, which models the 3D human body by jointly learning mesh deformations and 2D UV-space Gaussian textures.

NeRF

Mixture of Link Predictors on Graphs

1 code implementation13 Feb 2024 Li Ma, Haoyu Han, Juanhui Li, Harry Shomer, Hui Liu, Xiaofeng Gao, Jiliang Tang

Link prediction, which aims to forecast unseen connections in graphs, is a fundamental task in graph machine learning.

Link Prediction Mixture-of-Experts +1

SpecNeRF: Gaussian Directional Encoding for Specular Reflections

no code implementations CVPR 2024 Li Ma, Vasu Agrawal, Haithem Turki, Changil Kim, Chen Gao, Pedro Sander, Michael Zollhöfer, Christian Richardt

We show that our Gaussian directional encoding and geometry prior significantly improve the modeling of challenging specular reflections in neural radiance fields, which helps decompose appearance into more physically meaningful components.

Alteration Detection of Tensor Dependence Structure via Sparsity-Exploited Reranking Algorithm

no code implementations13 Oct 2023 Li Ma, Shenghao Qin, Yin Xia

Tensor-valued data arise frequently from a wide variety of scientific applications, and many among them can be translated into an alteration detection problem of tensor dependence structures.

Reranking

Picking Up Quantization Steps for Compressed Image Classification

1 code implementation21 Apr 2023 Li Ma, Peixi Peng, Guangyao Chen, Yifan Zhao, Siwei Dong, Yonghong Tian

The sensitivity of deep neural networks to compressed images hinders their usage in many real applications, which means classification networks may fail just after taking a screenshot and saving it as a compressed file.

Classification Image Classification +1

3D Video Loops from Asynchronous Input

no code implementations CVPR 2023 Li Ma, Xiaoyu Li, Jing Liao, Pedro V. Sander

Looping videos are short video clips that can be looped endlessly without visible seams or artifacts.

Neural Parameterization for Dynamic Human Head Editing

no code implementations1 Jul 2022 Li Ma, Xiaoyu Li, Jing Liao, Xuan Wang, Qi Zhang, Jue Wang, Pedro Sander

Implicit radiance functions emerged as a powerful scene representation for reconstructing and rendering photo-realistic views of a 3D scene.

3D geometry

TVConv: Efficient Translation Variant Convolution for Layout-aware Visual Processing

1 code implementation CVPR 2022 Jierun Chen, Tianlang He, Weipeng Zhuo, Li Ma, Sangtae Ha, S. -H. Gary Chan

Extensive experiments on face recognition show that TVConv reduces the computational cost by up to 3. 1x and improves the corresponding throughput by 2. 3x while maintaining a high accuracy compared to the depthwise convolution.

Face Recognition Image Segmentation +3

Deblur-NeRF: Neural Radiance Fields from Blurry Images

1 code implementation CVPR 2022 Li Ma, Xiaoyu Li, Jing Liao, Qi Zhang, Xuan Wang, Jue Wang, Pedro V. Sander

We demonstrate that our method can be used on both camera motion blur and defocus blur: the two most common types of blur in real scenes.

3D Scene Reconstruction NeRF +1

Microbiome subcommunity learning with logistic-tree normal latent Dirichlet allocation

1 code implementation11 Sep 2021 Patrick LeBlanc, Li Ma

As a result, LDA can produce inference which is highly sensitive to the specification of the number of subcommunities and often divides a single subcommunity into multiple artificial ones.

Bayesian Inference

Amplitude-Phase Recombination: Rethinking Robustness of Convolutional Neural Networks in Frequency Domain

1 code implementation ICCV 2021 Guangyao Chen, Peixi Peng, Li Ma, Jia Li, Lin Du, Yonghong Tian

This observation leads to more explanations of the CNN's generalization behaviors in both robustness to common perturbations and out-of-distribution detection, and motivates a new perspective on data augmentation designed by re-combing the phase spectrum of the current image and the amplitude spectrum of the distracter image.

Adversarial Attack Data Augmentation +2

SciConceptMiner: A system for large-scale scientific concept discovery

no code implementations ACL 2021 Zhihong Shen, Chieh-Han Wu, Li Ma, Chien-Pang Chen, Kuansan Wang

In this paper, we introduce a self-supervised end-to-end system, SciConceptMiner, for the automatic capture of emerging scientific concepts from both independent knowledge sources (semi-structured data) and academic publications (unstructured documents).

Distillation based Multi-task Learning: A Candidate Generation Model for Improving Reading Duration

no code implementations14 Feb 2021 Zhong Zhao, Yanmei Fu, Hanming Liang, Li Ma, Guangyao Zhao, Hongwei Jiang

One solution to this problem is to model the click and the reading duration simultaneously under the multi-task learning (MTL) framework.

Multi-Task Learning Recommendation Systems

Unsupervised tree boosting for learning probability distributions

1 code implementation26 Jan 2021 Naoki Awaya, Li Ma

We propose an unsupervised tree boosting algorithm for inferring the underlying sampling distribution of an i. i. d.

Density Estimation

Stability property and Dirichlet problem for translating solitons

no code implementations24 Dec 2020 Li Ma, Vicente Miquel

In this paper, we prove that the infimum of the mean curvature is zero for a translating solitons of hypersurface in $\re^{n+k}$.

Differential Geometry Analysis of PDEs translating solitons, stability, non-splitting, Dirichlet problem

Yamabe metrics, Fine solutions to the Yamabe flow, and local L1-stability

no code implementations24 Dec 2020 Li Ma

In this paper, we study the existence of complete Yamabe metric with zero scalar curvature on an n-dimensional complete Riemannian manifold $(M, g_0)$, $n\geq 3$.

Differential Geometry Analysis of PDEs 53C44, 53C20, 35Jxx, 35K50, 58J20

Two solutions to Kazdan-Warner's problem on surfaces

no code implementations24 Dec 2020 Li Ma

In this paper, we study the sign-changing Kazdan-Warner's problem on two dimensional closed Riemannian manifold with negative Euler number $\chi(M)<0$.

Differential Geometry Analysis of PDEs 53C20, 35J60, 58G99

Dirichlet-tree multinomial mixtures for clustering microbiome compositions

1 code implementation2 Aug 2020 Jialiang Mao, Li Ma

A common routine in microbiome research is to identify reproducible patterns in the population through unsupervised clustering of samples.

Methodology Applications

Privacy-preserving collaborative machine learning on genomic data using TensorFlow

1 code implementation11 Feb 2020 Cheng Hong, Zhicong Huang, Wen-jie Lu, Hunter Qu, Li Ma, Morten Dahl, Jason Mancuso

Machine learning (ML) methods have been widely used in genomic studies.

Cryptography and Security

CARP: Compression through Adaptive Recursive Partitioning for Multi-dimensional Images

1 code implementation CVPR 2020 Rongjie Liu, Meng Li, Li Ma

Fast and effective image compression for multi-dimensional images has become increasingly important for efficient storage and transfer of massive amounts of high-resolution images and videos.

Image Compression

POI Semantic Model with a Deep Convolutional Structure

no code implementations18 Mar 2019 Ji Zhao, Meiyu Yu, Huan Chen, Boning Li, Lingyu Zhang, Qi Song, Li Ma, Hua Chai, Jieping Ye

An accurate similarity calculation is challenging since the mismatch between a query and a retrieval text may exist in the case of a mistyped query or an alias inquiry.

model Retrieval

Multiscale Fisher's Independence Test for Multivariate Dependence

1 code implementation18 Jun 2018 Shai Gorsky, Li Ma

Identifying dependency in multivariate data is a common inference task that arises in numerous applications.

Bayesian graphical compositional regression for microbiome data

2 code implementations13 Dec 2017 Jialiang Mao, Yuhan Chen, Li Ma

An important task in microbiome studies is to test the existence of and give characterization to differences in the microbiome composition across groups of samples.

Methodology Applications Computation

Learning Asymmetric and Local Features in Multi-Dimensional Data through Wavelets with Recursive Partitioning

1 code implementation2 Nov 2017 Meng Li, Li Ma

Effective learning of asymmetric and local features in images and other data observed on multi-dimensional grids is a challenging objective critical for a wide range of image processing applications involving biomedical and natural images.

Bayesian Inference Image Reconstruction

Mixture modeling on related samples by $ψ$-stick breaking and kernel perturbation

no code implementations17 Apr 2017 Jacopo Soriano, Li Ma

We introduce two techniques for incorporating these features in modeling related data samples using kernel mixtures.

Bayesian Inference

Recursive partitioning and multi-scale modeling on conditional densities

1 code implementation14 Nov 2016 Li Ma

We introduce a nonparametric prior on the conditional distribution of a (univariate or multivariate) response given a set of predictors.

Methodology Statistics Theory Computation Statistics Theory

Efficient functional ANOVA through wavelet-domain Markov groves

no code implementations12 Feb 2016 Li Ma, Jacopo Soriano

We introduce a wavelet-domain functional analysis of variance (fANOVA) method based on a Bayesian hierarchical model.

Clustering

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