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Focusing on What Matters: Fine-grained Medical Activity recognition for Trauma Resuscitation via Actor Tracking

Focusing on What Matters: Fine-grained Medical Activity Reco...

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Wenjin Zhang Keyi Li Sen Yang Sifan Yuan Ivan Marsic Genevieve J. Sippel Mary S. Kim Randall S. Burd Rutgers University Waymo Children’s National Hospital

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Trauma is a leading cause of mortality worldwide, with about 20% of these deaths being preventable. Most of these preventable deaths result from errors during the initial resuscitation of injured patients. Decision support has been evaluated as an approach to support teams during this phase to reduce errors. Existing systems require manual data entry and monitoring, which makes tasks challenging to accomplish in a time-critical setting. This paper identified the specific challenges of achieving effective decision support in trauma resuscitation based on computer vision techniques, including complex backgrounds, crowded scenes, fine-grained activities, and a scarcity of labeled data. To address the first three challenges, the proposed system involved an actor tracker that identifies individuals, allowing the system to focus on actor-specific features. Video Masked Autoencoder (Video-MAE) was used to overcome the issue of insufficient labeled data. This approach enables self-supervised learning using unlabeled video content, improving feature representation for medical activities. For more reliable performance, an ensemble fusion method was introduced. This technique combines predictions from consecutive video clips and different actors. Our method outperformed existing approaches in identifying fine-grained activities, providing a solution for activity recognition in trauma resuscitation and similar complex domains.

关键词： computer vision conferences Focusing Self-supervised learning Manuals Activity recognition Time factors

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BGDNet: Background-guided Indoor Panorama Depth Estimation

BGDNet: Background-guided Indoor Panorama Depth Estimation

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Jiajing Chen Zhiqiang Wan Manjunath Narayana Yuguang Li Will Hutchcroft Senem Velipasalar Sing Bing Kang Syracuse University Zillow Group

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Depth estimation from single perspective image has received significant attention in the past decade, whereas the same task applied to single panoramic image remains comparatively under-explored. Most existing depth estimation models for panoramic images imitate models proposed for perspective images, which take RGB images as input and output depth directly. However, as demonstrated by our experiments, model performance drops significantly when the training and testing datasets greatly differ, since they over-fit the training data. To address this issue, we propose a novel method, referred to as the Background-guided Network (BGDNet), for more robust and accurate depth estimation from indoor panoramic images. Different from existing models, our proposed BGDNet first infers the background depth, namely from walls, floor and ceiling, via background masks, room layout and camera model. The background depth is then used to guide and improve the output foreground depth. We perform within dataset as well as cross-domain experiments on two benchmark datasets. The results show that BGDNet outperforms the state-of-the-art baselines, and is more robust to overfitting issues, with superior generalization across datasets.

关键词： Training computer vision conferences Layout Estimation Training data Cameras

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DehazeDCT: Towards Effective Non-Homogeneous Dehazing via Deformable Convolutional Transformer

DehazeDCT: Towards Effective Non-Homogeneous Dehazing via De...

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Wei Dong Han Zhou Ruiyi Wang Xiaohong Liu Guangtao Zhai Jun Chen McMaster University Shanghai Jiao Tong University

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Image dehazing, a pivotal task in low-level vision, aims to restore the visibility and detail from hazy images. Many deep learning methods with powerful representation learning capability demonstrate advanced performance on non-homogeneous dehazing, however, these methods usually struggle with processing high-resolution images (e.g., 4000 × 6000) due to their heavy computational demands. To address these challenges, we introduce an innovative non-homogeneous Dehazing method via Deformable Convolutional Transformer-like architecture (DehazeDCT). Specifically, we first design a transformer-like network based on deformable convolution v4, which offers long-range dependency and adaptive spatial aggregation capabilities and demonstrates faster convergence and forward speed. Furthermore, we leverage a lightweight Retinex-inspired transformer to achieve color correction and structure refinement. Extensive experiment results and highly competitive performance of our method in NTIRE 2024 Dense and Non-Homogeneous Dehazing Challenge, ranking second among all 16 submissions, demonstrate the superior capability of our proposed method. The code is available: https://***/movingforward100/Dehazing_R.

关键词： Convolutional codes Representation learning Image color analysis Convolution computer architecture Transformer cores Transformers

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Analyzing the Internals of Neural Radiance Fields

Analyzing the Internals of Neural Radiance Fields

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Lukas Radl Andreas Kurz Michael Steiner Markus Steinberger Graz University of Technology Austria

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Modern Neural Radiance Fields (NeRFs) learn a mapping from position to volumetric density leveraging proposal network samplers. In contrast to the coarse-to-fine sampling approach with two NeRFs, this offers significant potential for acceleration using lower network capacity. Given that NeRFs utilize most of their network capacity to estimate radiance, they could store valuable density information in their parameters or their deep features. To investigate this proposition, we take one step back and analyze large, trained ReLU-MLPs used in coarse-to-fine sampling. Building on our novel activation visualization method, we find that trained NeRFs, Mip-NeRFs and proposal network samplers map samples with high density to local minima along a ray in activation feature space. We show how these large MLPs can be accelerated by transforming intermediate activations to a weight estimate, without any modifications to the training protocol or the network architecture. With our approach, we can reduce the computational requirements of trained NeRFs by up to 50% with only a slight hit in rendering quality. Extensive experimental evaluation on a variety of datasets and architectures demonstrates the effectiveness of our approach. Consequently, our methodology provides valuable insight into the inner workings of NeRFs.

关键词： Training Visualization computer vision Protocols conferences Network architecture Neural radiance field

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Scattering Prompt Tuning: A Fine-tuned Foundation Model for SAR Object recognition

Scattering Prompt Tuning: A Fine-tuned Foundation Model for ...

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Weilong Guo Shengyang Liv Jian Yang Key Laboratory of Space Utilization Chinese Academy of Sciences Technology and the Engineering Center for Space Utilization Chinese Academy of Sciences University of Chinese Academy of Sciences

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Synthetic Aperture Radar (SAR) serves as a vital tool in various earth observation applications, providing robust imaging under challenging weather conditions. While the fine-tuned foundation models excel in many downstream tasks, they struggle with SAR object recognition because of SAR's unique imaging and scattering characteristics. In this study, we propose a novel approach named Scattering Prompt Tuning (SPT) based vision foundation model. It uses SAR image scattering information as a prompt and integrates learnable parameters into the pre-trained model's input space to help learn SAR's unique information. We also employ a lightweight Residual AdapterMLP for fine-tuning, design a Sequential Feature Aggregation (SFA) to selectively fuse features from different transformer blocks effectively, and develop a Dynamic Distributional Contrast loss (DCLoss) to maintain the proper distance between different objects in feature space. Additionally, a four-stage training strategy, incorporating semi-supervised learning, is deployed to enhance SAR object recognition performance further Our approach reaches a Top-1 accuracy of 37.9% and an AUROC of 0.83 on the final dataset, winning the first place in the SAR Classification track of PBVS 2024 Multi-modal Aerial View Object Classification Challenge, which is better than the latest advanced fine-tuned foundation models.

关键词： Training Scattering Imaging Semisupervised learning Radar imaging Radar polarimetry pattern recognition

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QuantNAS: Quantization-aware Neural Architecture Search For Efficient Deployment On Mobile Device

QuantNAS: Quantization-aware Neural Architecture Search For ...

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Tianxiao Gao Li Guo Shanwei Zhao Peihan Xu Yukun Yang Xionghao Liu Shihao Wang Shiai Zhu Dajiang Zhou Ant Group

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Deep convolutional networks are increasingly applied in mobile AI scenarios. To achieve efficient deployment, researchers combine neural architecture search (NAS) and quantization to find the best quantized architecture. However, existing methods overlook the on-device implementation of quantization. The searching result is usually sub-optimal or has limited latency reduction. To this end, we propose QuantNAS, a novel quantization-aware NAS based on a two-stage one-shot method. Different from the previous method, our method considers the on-device implementation of the quantized network and searches for the architecture from a fully quantized supernet. During training, we propose a batch-statistics-based strategy to alleviate the non-convergence problem. Besides, a scale predictor is proposed and is jointly trained with the supernet. During search, the scale predictor can provide optimal scale for different subnets without retraining. At different latency levels on Kirin 9000 mobile CPU, the proposed method achieves 1.53%-1.68% Top-1 accuracy improvement on ImageNet 1K dataset and 1.7% mAP improvement.

关键词： Training computer vision Quantization (signal) conferences Computational modeling computer architecture Mobile handsets

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Relational Edge-Node Graph Attention Network for Classification of Micro-Expressions

Relational Edge-Node Graph Attention Network for Classificat...

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Ankith Jain Rakesh Kumar Bir Bhanu Department of Electrical and Computer Engineering University of California Riverside

Facial micro-expressions (MEs) refer to subtle, transient, and involuntary muscle movements expressing a person’s true feelings. This paper presents a novel two-stream relational edge-node graph attention network-based approach to classify MEs in a video by selecting the high-intensity frames and edge-node features that can provide valuable information about the relationship between nodes and structural information in a graph structure. The paper examines the impact of different edge-node features and their relationships on the graphs. The first step involves extracting high-intensity-emotion frames from the video using optical flow. Second, node feature embeddings are calculated using the node location coordinate features and the patch size information of the optical flow across each node location. Additionally, we obtain the global and local structural similarity score using the jaccard’s similarity score and radial basis function as the edge features. Third, a self-attention graph pooling layer helps to remove the nodes with lower attention scores based on the top-k selection. As the final step, the network employs a two-stream edge-node graph attention network that focuses on finding correlations among the edge and node features, such as landmark coordinates, optical flow, and global and local edge features. A three-frame graph structure is designed to obtain spatiotemporal information. For 3 and 5 expression classes, the results are compared for SMIC and CASME II databases.

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Multimodal Attack Detection for Action recognition Models

Multimodal Attack Detection for Action Recognition Models

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Furkan Mumcu Yasin Yilmaz University of South Florida Tampa FL

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Adversarial machine learning attacks on video action recognition models is a growing research area and many effective attacks were introduced in recent years. These attacks show that action recognition models can be breached in many ways. Hence using these models in practice raises significant security concerns. However, there are very few works which focus on defending against or detecting attacks. In this work, we propose a novel universal detection method which is compatible with any action recognition model. In our extensive experiments, we show that our method consistently detects various attacks against different target models with high true positive rates while satisfying very low false positive rates. Tested against four state-of-the-art attacks targeting four action recognition models, the proposed detector achieves an average AUC of 0.911 over 16 test cases while the best performance achieved by the existing detectors is 0.645 average AUC. This 41.2% improvement is enabled by the robustness of the proposed detector to varying attack methods and target models. The lowest AUC achieved by our detector across the 16 test cases is 0.837 while the competing detector’s performance drops as low as 0.211. We also show that the proposed detector is robust to varying attack strengths. In addition, we analyze our method’s real-time performance with different hardware setups to demonstrate its potential as a practical defense mechanism.

关键词： computer vision Target recognition conferences Graphics processing units Detectors Real-time systems Robustness

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GM-DETR: Generalized Muiltispectral DEtection TRansformer with Efficient Fusion Encoder for Visible-Infrared Detection

GM-DETR: Generalized Muiltispectral DEtection TRansformer wi...

引用

ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Yiming Xiao Fanman Meng Qingbo Wu Linfeng Xu Mingzhou He Hongliang Li University of Electronic Science and Technology of China China

ISBN: (数字)9798350365474

ISBN: (纸本)9798350365481

Multispectral object detection based on RGB and IR achieves improved accurate and robust performance by integrating complementary information from different modalities. However, existing methods predominantly focus on effectively fusing information from both modalities to enhance detection performance, and rarely study the diversified utilization of RGB and IR data and explore the adaptability of the model to practical application scenarios. We first analyze the utilization of datasets for multispectral object detection, and compare their testing performance. To better leverage datasets and address more generalized model application scenarios, we propose a Generalized Multispectral DEtection TRansformer (GM-DETR) with a two-stage training strategy. Specifically, we design the Modality-Specific Feature Interaction (MSFI) module to extract the high-level information from RGB and IR, and propose the Cross-Modality-Scale feature Fusion (CMSF) module for fusing RGB and IR modalities, which performs multi-scale cross-modalities fusion. Our GM-DETR achieves state-of-the-art performance on FLIR and LLVIP benchmark datasets.

关键词： Training Adaptation models computer vision conferences Object detection Benchmark testing Feature extraction

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Diversified and Multi-Class Controllable Industrial Defect Synthesis for Data Augmentation and Transfer

Diversified and Multi-Class Controllable Industrial Defect S...

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ieee computer Society conference on computer vision and pattern recognition workshops (cvprw)

作者： Jing Wei Fei Shen Chengkan Lv Zhengtao Zhang Feng Zhang Huabin Yang Institute of Automation Chinese Academy of Sciences The School of Artificial Intelligence University of Chinese Academy of Sciences CASI Vision Technology CO.

Data augmentation is crucial to solve few-sample issues in industrial inspection based on deep learning. However, current industrial data augmentation methods have not yet demonstrated on-par ability in the synthesis of complex defects with pixel-level annotations. This paper proposes a new defect synthesis framework to fill the gap. Firstly, DCDGANc (Diversified and multi-class Controllable Defect Generation Adversarial Networks based on constant source images) is proposed to employ class labels to construct source inputs to control the category and random codes to generate diversified styles of defects. DCDGANc can generate defect content images with pure backgrounds, which avoids the influence of non-defect information and makes it easy to obtain binary masks by segmentation. Secondly, the Poisson blending is improved to avoid content loss when blending generated defect contents to the normal backgrounds. Finally, the complete defect samples and accurate pixel-level annotations are obtained by fine image processing. Experiments are conducted to verify the effectiveness of our work in wood, fabric, metal, and marble. The results show that our methods yield significant improvement in the segmentation performance of industrial products. Moreover, our work enables zero-shot inspection by facilitating defect transfer between datasets with different backgrounds but similar defects, which can greatly reduce the cost of data collection in industrial inspection.

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