由于大气湍流的扭曲而恢复图像是一个长期存在的问题,这是由于变形的空间变化,图像形成过程的非线性以及训练和测试数据的稀缺性。现有方法通常在失真模型上具有强大的统计假设,在许多情况下,由于没有概括,因此在现实世界中的性能有限。为了克服挑战,本文提出了一种端到端物理驱动的方法,该方法有效,可以推广到现实世界的湍流。在数据合成方面,我们通过通过宽sense式的平稳性近似随机场来显着增加SOTA湍流模拟器可以处理的图像分辨率。新的数据合成过程使大规模的多级湍流和训练的地面真相对产生。在网络设计方面,我们提出了湍流缓解变压器(TMT),这是一个两级U-NET形状的多帧恢复网络,该网络具有Noval有效的自发机制,称为暂时通道关节关注(TCJA)。我们还引入了一种新的培训方案,该方案由新的模拟器启用,并设计新的变压器单元以减少内存消耗。在静态场景和动态场景上的实验结果是有希望的,包括各种真实的湍流场景。
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特殊设备产品的设计或仿真分析必须遵循国家标准,因此可能有必要反复参考设计过程中标准的内容。但是,基于关键字检索的传统问题应答系统很难提供准确的技术问题的答案。因此,我们使用自然语言处理技术来设计用于压力容器设计中的决策过程的问题应答系统。为了解决技术问题应答系统的培训数据不足的问题,我们提出了一种根据来自几个不同维度的声明性句子生成问题的方法,以便可以从声明性句子获得多个问题答案对。此外,我们设计了一种基于双向长期短期存储器(BILSTM)网络的交互式注意模型,以提高两个问题句子的相似性比较的性能。最后,在公共和技术域数据集中测试了问题应答系统的性能。
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这封信提供了在沟通限制下进行多机器人探索的完整框架会议 - 结合措施。考虑到沟通在现实世界中的带宽和范围都受到限制,我们提出了一种轻巧的环境演示方法和有效的合作探索策略。对于较低的带宽,每个机器人都利用特定的多面有来维护自由空间和超级边界信息(SFI)作为勘探决策的来源。为了减少重复的探索,我们开发了一种基于任务的协议,该协议驱动机器人以稳定的会合方式共享收集的信息。我们还为集中式和分散案件设计了完整的路径计划计划。为了验证我们的框架是实用且通用的,我们提出了广泛的基准,并将系统部署到多UGV和多UAV平台中。
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我们提出了Urbanscene3D,这是一个大规模的数据平台,用于研究城市场景感知和重建。 Urbanscene3D包含超过128K的高分辨率图像,其中涵盖了16个场景,包括大规模的真实城市区域和合成城市,总共有136 km^2区域。该数据集还包含具有不同观察模式的高精度激光扫描和数百个图像集,它们为设计和评估空中路径计划和3D重建算法提供了全面的基准。此外,该数据集是基于虚幻引擎和AirSim模拟器构建的数据集以及数据集中每个建筑物的手动注释的唯一实例标签,启用了各种数据的生成,例如2D/3D边界框, ,以及3D点云/网状分段等。具有物理发动机和照明系统的模拟器不仅产生各种数据,而且还使用户能够在拟议的城市环境中模拟汽车或无人机以进行未来的研究。
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Masked image modeling (MIM) performs strongly in pre-training large vision Transformers (ViTs). However, small models that are critical for real-world applications cannot or only marginally benefit from this pre-training approach. In this paper, we explore distillation techniques to transfer the success of large MIM-based pre-trained models to smaller ones. We systematically study different options in the distillation framework, including distilling targets, losses, input, network regularization, sequential distillation, etc, revealing that: 1) Distilling token relations is more effective than CLS token- and feature-based distillation; 2) An intermediate layer of the teacher network as target perform better than that using the last layer when the depth of the student mismatches that of the teacher; 3) Weak regularization is preferred; etc. With these findings, we achieve significant fine-tuning accuracy improvements over the scratch MIM pre-training on ImageNet-1K classification, using all the ViT-Tiny, ViT-Small, and ViT-base models, with +4.2%/+2.4%/+1.4% gains, respectively. Our TinyMIM model of base size achieves 52.2 mIoU in AE20K semantic segmentation, which is +4.1 higher than the MAE baseline. Our TinyMIM model of tiny size achieves 79.6% top-1 accuracy on ImageNet-1K image classification, which sets a new record for small vision models of the same size and computation budget. This strong performance suggests an alternative way for developing small vision Transformer models, that is, by exploring better training methods rather than introducing inductive biases into architectures as in most previous works. Code is available at https://github.com/OliverRensu/TinyMIM.
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In this paper, we propose a robust 3D detector, named Cross Modal Transformer (CMT), for end-to-end 3D multi-modal detection. Without explicit view transformation, CMT takes the image and point clouds tokens as inputs and directly outputs accurate 3D bounding boxes. The spatial alignment of multi-modal tokens is performed implicitly, by encoding the 3D points into multi-modal features. The core design of CMT is quite simple while its performance is impressive. CMT obtains 73.0% NDS on nuScenes benchmark. Moreover, CMT has a strong robustness even if the LiDAR is missing. Code will be released at https://github.com/junjie18/CMT.
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Dataset distillation has emerged as a prominent technique to improve data efficiency when training machine learning models. It encapsulates the knowledge from a large dataset into a smaller synthetic dataset. A model trained on this smaller distilled dataset can attain comparable performance to a model trained on the original training dataset. However, the existing dataset distillation techniques mainly aim at achieving the best trade-off between resource usage efficiency and model utility. The security risks stemming from them have not been explored. This study performs the first backdoor attack against the models trained on the data distilled by dataset distillation models in the image domain. Concretely, we inject triggers into the synthetic data during the distillation procedure rather than during the model training stage, where all previous attacks are performed. We propose two types of backdoor attacks, namely NAIVEATTACK and DOORPING. NAIVEATTACK simply adds triggers to the raw data at the initial distillation phase, while DOORPING iteratively updates the triggers during the entire distillation procedure. We conduct extensive evaluations on multiple datasets, architectures, and dataset distillation techniques. Empirical evaluation shows that NAIVEATTACK achieves decent attack success rate (ASR) scores in some cases, while DOORPING reaches higher ASR scores (close to 1.0) in all cases. Furthermore, we conduct a comprehensive ablation study to analyze the factors that may affect the attack performance. Finally, we evaluate multiple defense mechanisms against our backdoor attacks and show that our attacks can practically circumvent these defense mechanisms.
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Blind image quality assessment (BIQA) remains challenging due to the diversity of distortion and image content variation, which complicate the distortion patterns crossing different scales and aggravate the difficulty of the regression problem for BIQA. However, existing BIQA methods often fail to consider multi-scale distortion patterns and image content, and little research has been done on learning strategies to make the regression model produce better performance. In this paper, we propose a simple yet effective Progressive Multi-Task Image Quality Assessment (PMT-IQA) model, which contains a multi-scale feature extraction module (MS) and a progressive multi-task learning module (PMT), to help the model learn complex distortion patterns and better optimize the regression issue to align with the law of human learning process from easy to hard. To verify the effectiveness of the proposed PMT-IQA model, we conduct experiments on four widely used public datasets, and the experimental results indicate that the performance of PMT-IQA is superior to the comparison approaches, and both MS and PMT modules improve the model's performance.
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Automatic music generation with artificial intelligence typically requires a large amount of data which is hard to obtain for many less common genres and musical instruments. To tackle this issue, we present ongoing work and preliminary findings on the possibility for deep models to transfer knowledge from language to music, by finetuning large language models pre-trained on a massive text corpus on only hundreds of MIDI files of drum performances. We show that by doing so, one of the largest, state-of-the-art models (GPT3) is capable of generating reasonable drum grooves, while models that are not pre-trained (Transformer) shows no such ability beyond naive repetition. Evaluating generated music is a challenging task, more so is evaluating drum grooves with little precedence in literature. Hence, we propose a tailored structural evaluation method and analyze drum grooves produced by GPT3 compared to those played by human professionals, exposing the strengths and weaknesses of such generation by language-to-music transfer. Our findings suggest that language-to-music transfer learning with large language models is viable and promising.
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Few Shot Instance Segmentation (FSIS) requires models to detect and segment novel classes with limited several support examples. In this work, we explore a simple yet unified solution for FSIS as well as its incremental variants, and introduce a new framework named Reference Twice (RefT) to fully explore the relationship between support/query features based on a Transformer-like framework. Our key insights are two folds: Firstly, with the aid of support masks, we can generate dynamic class centers more appropriately to re-weight query features. Secondly, we find that support object queries have already encoded key factors after base training. In this way, the query features can be enhanced twice from two aspects, i.e., feature-level and instance-level. In particular, we firstly design a mask-based dynamic weighting module to enhance support features and then propose to link object queries for better calibration via cross-attention. After the above steps, the novel classes can be improved significantly over our strong baseline. Additionally, our new framework can be easily extended to incremental FSIS with minor modification. When benchmarking results on the COCO dataset for FSIS, gFSIS, and iFSIS settings, our method achieves a competitive performance compared to existing approaches across different shots, e.g., we boost nAP by noticeable +8.2/+9.4 over the current state-of-the-art FSIS method for 10/30-shot. We further demonstrate the superiority of our approach on Few Shot Object Detection. Code and model will be available.
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