Search Results for author: Hao Lu

Found 59 papers, 36 papers with code

TasselNet: Counting maize tassels in the wild via local counts regression network

no code implementations7 Jul 2017 Hao Lu, Zhiguo Cao, Yang Xiao, Bohan Zhuang, Chunhua Shen

To our knowledge, this is the first time that a plant-related counting problem is considered using computer vision technologies under unconstrained field-based environment.

Plant Phenotyping regression

When Unsupervised Domain Adaptation Meets Tensor Representations

1 code implementation ICCV 2017 Hao Lu, Lei Zhang, Zhiguo Cao, Wei Wei, Ke Xian, Chunhua Shen, Anton Van Den Hengel

Domain adaption (DA) allows machine learning methods trained on data sampled from one distribution to be applied to data sampled from another.

Unsupervised Domain Adaptation

The Edge Density Barrier: Computational-Statistical Tradeoffs in Combinatorial Inference

no code implementations ICML 2018 Hao Lu, Yuan Cao, Zhuoran Yang, Junwei Lu, Han Liu, Zhaoran Wang

We study the hypothesis testing problem of inferring the existence of combinatorial structures in undirected graphical models.

Two-sample testing

Deep attention-based classification network for robust depth prediction

1 code implementation11 Jul 2018 Ruibo Li, Ke Xian, Chunhua Shen, Zhiguo Cao, Hao Lu, Lingxiao Hang

However, robust depth prediction suffers from two challenging problems: a) How to extract more discriminative features for different scenes (compared to a single scene)?

Classification Deep Attention +5

Index Network

6 code implementations11 Aug 2019 Hao Lu, Yutong Dai, Chunhua Shen, Songcen Xu

By viewing the indices as a function of the feature map, we introduce the concept of "learning to index", and present a novel index-guided encoder-decoder framework where indices are self-learned adaptively from data and are used to guide the downsampling and upsampling stages, without extra training supervision.

Grayscale Image Denoising Image Denoising +3

From Open Set to Closed Set: Supervised Spatial Divide-and-Conquer for Object Counting

3 code implementations7 Jan 2020 Haipeng Xiong, Hao Lu, Chengxin Liu, Liang Liu, Chunhua Shen, Zhiguo Cao

Visual counting, a task that aims to estimate the number of objects from an image/video, is an open-set problem by nature, i. e., the number of population can vary in [0, inf) in theory.

Object Counting

A Learning-based Iterative Method for Solving Vehicle Routing Problems

1 code implementation ICLR 2020 Hao Lu, Xingwen Zhang, Shuang Yang

This paper is concerned with solving combinatorial optimization problems, in particular, the capacitated vehicle routing problems (CVRP).

Combinatorial Optimization

The Effect of Dipole from $γ$-AgI Substrates on Heterogeneous Ice Nucleation

no code implementations23 Aug 2020 Hao Lu, Quanming Xu, Chaohong Wang, Jianyang Wu, Rongdun Hong, Xiang-Yang Liu, Zhisen Zhang

Heterogeneous ice nucleation is one of the most common and important process in the physical environment.

Materials Science

Learning Affinity-Aware Upsampling for Deep Image Matting

1 code implementation CVPR 2021 Yutong Dai, Hao Lu, Chunhua Shen

By looking at existing upsampling operators from a unified mathematical perspective, we generalize them into a second-order form and introduce Affinity-Aware Upsampling (A2U) where upsampling kernels are generated using a light-weight lowrank bilinear model and are conditioned on second-order features.

Image Matting Image Reconstruction

Bootstrapping Fitted Q-Evaluation for Off-Policy Inference

no code implementations6 Feb 2021 Botao Hao, Xiang Ji, Yaqi Duan, Hao Lu, Csaba Szepesvári, Mengdi Wang

Bootstrapping provides a flexible and effective approach for assessing the quality of batch reinforcement learning, yet its theoretical property is less understood.

Off-policy evaluation

Dual-GAN: Joint BVP and Noise Modeling for Remote Physiological Measurement

no code implementations CVPR 2021 Hao Lu, Hu Han, S. Kevin Zhou

Remote photoplethysmography (rPPG) based physiological measurement has great application values in health monitoring, emotion analysis, etc.

Disentanglement Emotion Recognition +1

Composing Photos Like a Photographer

1 code implementation CVPR 2021 Chaoyi Hong, Shuaiyuan Du, Ke Xian, Hao Lu, Zhiguo Cao, Weicai Zhong

To this end, we introduce the concept of the key composition map (KCM) to encode the composition rules.

Image Cropping

BokehMe: When Neural Rendering Meets Classical Rendering

1 code implementation CVPR 2022 Juewen Peng, Zhiguo Cao, Xianrui Luo, Hao Lu, Ke Xian, Jianming Zhang

Based on this formulation, we implement the classical renderer by a scattering-based method and propose a two-stage neural renderer to fix the erroneous areas from the classical renderer.

Neural Rendering

3D Instances as 1D Kernels

1 code implementation15 Jul 2022 Yizheng Wu, Min Shi, Shuaiyuan Du, Hao Lu, Zhiguo Cao, Weicai Zhong

The idea of instance kernel is inspired by recent success of dynamic convolutions in 2D/3D instance segmentation.

Ranked #2 on 3D Instance Segmentation on S3DIS (mCov metric)

3D Instance Segmentation Semantic Segmentation

MPIB: An MPI-Based Bokeh Rendering Framework for Realistic Partial Occlusion Effects

1 code implementation18 Jul 2022 Juewen Peng, Jianming Zhang, Xianrui Luo, Hao Lu, Ke Xian, Zhiguo Cao

Partial occlusion effects are a phenomenon that blurry objects near a camera are semi-transparent, resulting in partial appearance of occluded background.

Robust Object Detection With Inaccurate Bounding Boxes

1 code implementation20 Jul 2022 Chengxin Liu, Kewei Wang, Hao Lu, Zhiguo Cao, Ziming Zhang

As the crowd-sourcing labeling process and the ambiguities of the objects may raise noisy bounding box annotations, the object detectors will suffer from the degenerated training data.

Multiple Instance Learning Object +2

FADE: Fusing the Assets of Decoder and Encoder for Task-Agnostic Upsampling

no code implementations21 Jul 2022 Hao Lu, Wenze Liu, Hongtao Fu, Zhiguo Cao

We consider the problem of task-agnostic feature upsampling in dense prediction where an upsampling operator is required to facilitate both region-sensitive tasks like semantic segmentation and detail-sensitive tasks such as image matting.

Feature Upsampling Image Matting +1

Design What You Desire: Icon Generation from Orthogonal Application and Theme Labels

1 code implementation31 Jul 2022 Yinpeng Chen, Zhiyu Pan, Min Shi, Hao Lu, Zhiguo Cao, Weicai Zhong

Generative adversarial networks (GANs) have been trained to be professional artists able to create stunning artworks such as face generation and image style transfer.

Disentanglement Face Generation +1

DoF-NeRF: Depth-of-Field Meets Neural Radiance Fields

1 code implementation1 Aug 2022 Zijin Wu, Xingyi Li, Juewen Peng, Hao Lu, Zhiguo Cao, Weicai Zhong

To mitigate this issue, we introduce DoF-NeRF, a novel neural rendering approach that can deal with shallow DoF inputs and can simulate DoF effect.

Neural Rendering

SAPA: Similarity-Aware Point Affiliation for Feature Upsampling

2 code implementations26 Sep 2022 Hao Lu, Wenze Liu, Zixuan Ye, Hongtao Fu, Yuliang Liu, Zhiguo Cao

We introduce point affiliation into feature upsampling, a notion that describes the affiliation of each upsampled point to a semantic cluster formed by local decoder feature points with semantic similarity.

Depth Estimation Feature Upsampling +6

ParallelNet: Multi-mode Trajectory Prediction by Multi-mode Trajectory Fusion

no code implementations20 Dec 2022 Fei Wu, Luoyu Chen, Hao Lu

Level 5 Autonomous Driving, a technology that a fully automated vehicle (AV) requires no human intervention, has raised serious concerns on safety and stability before widespread use.

Autonomous Driving Trajectory Prediction

Infusing Definiteness into Randomness: Rethinking Composition Styles for Deep Image Matting

1 code implementation27 Dec 2022 Zixuan Ye, Yutong Dai, Chaoyi Hong, Zhiguo Cao, Hao Lu

Inspired by this, we introduce a novel composition style that binds the source and combined foregrounds in a definite triplet.

Image Matting

Find Beauty in the Rare: Contrastive Composition Feature Clustering for Nontrivial Cropping Box Regression

no code implementations17 Feb 2023 Zhiyu Pan, Yinpeng Chen, Jiale Zhang, Hao Lu, Zhiguo Cao, Weicai Zhong

Observing that similar composition patterns tend to be shared by the cropping boundaries annotated nearly, we argue to find the beauty of composition from the rare samples by clustering the samples with similar cropping boundary annotations, ie, similar composition patterns.

Clustering Image Cropping +2

Neuron Structure Modeling for Generalizable Remote Physiological Measurement

1 code implementation CVPR 2023 Hao Lu, Zitong Yu, Xuesong Niu, Yingcong Chen

We show that most domain generalization methods do not work well in this problem, as domain labels are ambiguous in complicated environmental changes.

Domain Generalization

Label Name is Mantra: Unifying Point Cloud Segmentation across Heterogeneous Datasets

no code implementations19 Mar 2023 Yixun Liang, Hao He, Shishi Xiao, Hao Lu, Yingcong Chen

In this paper, we propose a principled approach that supports learning from heterogeneous datasets with different label sets.

Language Modelling Point Cloud Segmentation

Learning Second-Order Attentive Context for Efficient Correspondence Pruning

no code implementations28 Mar 2023 Xinyi Ye, Weiyue Zhao, Hao Lu, Zhiguo Cao

It is challenging because of the disorganized spatial distribution of numerous outliers, especially when putative correspondences are largely dominated by outliers.

Point-and-Shoot All-in-Focus Photo Synthesis from Smartphone Camera Pair

no code implementations11 Apr 2023 Xianrui Luo, Juewen Peng, Weiyue Zhao, Ke Xian, Hao Lu, Zhiguo Cao

Benefiting from the multi-camera module in modern smartphones, we introduce a new task of AIF synthesis from main (wide) and ultra-wide cameras.

Federated Learning with Uncertainty-Based Client Clustering for Fleet-Wide Fault Diagnosis

1 code implementation26 Apr 2023 Hao Lu, Adam Thelen, Olga Fink, Chao Hu, Simon Laflamme

To quantify dataset similarity between clients without explicitly sharing data, each client sets aside a local test dataset and evaluates the other clients' model prediction accuracy and uncertainty on this test dataset.

Clustering Federated Learning

Vision Transformer Off-the-Shelf: A Surprising Baseline for Few-Shot Class-Agnostic Counting

no code implementations8 May 2023 Zhicheng Wang, Liwen Xiao, Zhiguo Cao, Hao Lu

This task is typically addressed by extracting the features of query image and exemplars respectively and then matching their feature similarity, leading to an extract-then-match paradigm.

rPPG-MAE: Self-supervised Pre-training with Masked Autoencoders for Remote Physiological Measurement

1 code implementation4 Jun 2023 Xin Liu, Yuting Zhang, Zitong Yu, Hao Lu, Huanjing Yue, Jingyu Yang

However, they focus on the contrastive learning between samples, which neglect the inherent self-similar prior in physiological signals and seem to have a limited ability to cope with noisy.

Contrastive Learning

A2B: Anchor to Barycentric Coordinate for Robust Correspondence

no code implementations5 Jun 2023 Weiyue Zhao, Hao Lu, Zhiguo Cao, Xin Li

This approach offers a new perspective to alleviate the problem of repeated patterns and emphasizes the importance of choosing coordinate representations for feature correspondences.

Learning Probabilistic Coordinate Fields for Robust Correspondences

no code implementations7 Jun 2023 Weiyue Zhao, Hao Lu, Xinyi Ye, Zhiguo Cao, Xin Li

We introduce Probabilistic Coordinate Fields (PCFs), a novel geometric-invariant coordinate representation for image correspondence problems.

Image Registration Pose Estimation

Box-DETR: Understanding and Boxing Conditional Spatial Queries

1 code implementation17 Jul 2023 Wenze Liu, Hao Lu, Yuliang Liu, Zhiguo Cao

In DAB-DETR, such queries are modulated by the so-called conditional linear projection at each decoder stage, aiming to search for positions of interest such as the four extremities of the box.

ESTextSpotter: Towards Better Scene Text Spotting with Explicit Synergy in Transformer

3 code implementations ICCV 2023 Mingxin Huang, Jiaxin Zhang, Dezhi Peng, Hao Lu, Can Huang, Yuliang Liu, Xiang Bai, Lianwen Jin

To this end, we introduce a new model named Explicit Synergy-based Text Spotting Transformer framework (ESTextSpotter), which achieves explicit synergy by modeling discriminative and interactive features for text detection and recognition within a single decoder.

Text Detection Text Spotting

An interpretable deep learning method for bearing fault diagnosis

no code implementations20 Aug 2023 Hao Lu, Austin M. Bray, Chao Hu, Andrew T. Zimmerman, Hongyi Xu

During the model evaluation process, the proposed approach retrieves prediction basis samples from the health library according to the similarity of the feature importance.

Feature Importance

Point-Query Quadtree for Crowd Counting, Localization, and More

1 code implementation ICCV 2023 Chengxin Liu, Hao Lu, Zhiguo Cao, Tongliang Liu

Such a querying process yields an intuitive, universal modeling of crowd as both the input and output are interpretable and steerable.

Crowd Counting

Towards Generalizable Multi-Camera 3D Object Detection via Perspective Debiasing

1 code implementation17 Oct 2023 Hao Lu, Yunpeng Zhang, Qing Lian, Dalong Du, Yingcong Chen

In our approach, we render diverse view maps from BEV features and rectify the perspective bias of these maps, leveraging implicit foreground volumes to bridge the camera and BEV planes.

3D Object Detection Domain Generalization +2

Self-similarity Prior Distillation for Unsupervised Remote Physiological Measurement

no code implementations9 Nov 2023 Xinyu Zhang, Weiyu Sun, Hao Lu, Ying Chen, Yun Ge, Xiaolin Huang, Jie Yuan, Yingcong Chen

In this paper, we propose a Self-Similarity Prior Distillation (SSPD) framework for unsupervised rPPG estimation, which capitalizes on the intrinsic self-similarity of cardiac activities.

Contrastive Learning

Benefit from public unlabeled data: A Frangi filtering-based pretraining network for 3D cerebrovascular segmentation

1 code implementation23 Dec 2023 Gen Shi, Hao Lu, Hui Hui, Jie Tian

In this study, we construct the largest preprocessed unlabeled TOF-MRA datasets (1510 subjects) to date.

Segmentation

Machine Learning-Based Analysis of Ebola Virus' Impact on Gene Expression in Nonhuman Primates

no code implementations16 Jan 2024 Mostafa Rezapour, Muhammad Khalid Khan Niazi, Hao Lu, Aarthi Narayanan, Metin Nafi Gurcan

This study introduces the Supervised Magnitude-Altitude Scoring (SMAS) methodology, a machine learning-based approach, for analyzing gene expression data obtained from nonhuman primates (NHPs) infected with Ebola virus (EBOV).

Advancing Generalizable Remote Physiological Measurement through the Integration of Explicit and Implicit Prior Knowledge

1 code implementation11 Mar 2024 Yuting Zhang, Hao Lu, Xin Liu, Yingcong Chen, Kaishun Wu

Remote photoplethysmography (rPPG) is a promising technology that captures physiological signals from face videos, with potential applications in medical health, emotional computing, and biosecurity recognition.

Domain Generalization

In-Context Matting

1 code implementation23 Mar 2024 He guo, Zixuan Ye, Zhiguo Cao, Hao Lu

We introduce in-context matting, a novel task setting of image matting.

Image Matting

Scaling Multi-Camera 3D Object Detection through Weak-to-Strong Eliciting

2 code implementations10 Apr 2024 Hao Lu, Jiaqi Tang, Xinli Xu, Xu Cao, Yunpeng Zhang, Guoqing Wang, Dalong Du, Hao Chen, Yingcong Chen

Finally, for MC3D-Det joint training, the elaborate dataset merge strategy is designed to solve the problem of inconsistent camera numbers and camera parameters.

3D Object Detection Autonomous Driving +1

Resolve Domain Conflicts for Generalizable Remote Physiological Measurement

2 code implementations11 Apr 2024 Weiyu Sun, Xinyu Zhang, Hao Lu, Ying Chen, Yun Ge, Xiaolin Huang, Jie Yuan, Yingcong Chen

Remote photoplethysmography (rPPG) technology has become increasingly popular due to its non-invasive monitoring of various physiological indicators, making it widely applicable in multimedia interaction, healthcare, and emotion analysis.

Attribute Emotion Recognition +1

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