大多数手指静脉特征提取算法由于其质地表示能力而达到满意的性能,尽管同时忽略了手指组织形成的强度分布,以及在某些情况下,将其加工为背景噪声。在本文中,我们利用这种噪音作为一种新型软生物识别性状,以实现更好的手指静脉识别性能。首先,提出了对手指静脉成像原理的详细分析和图像的特性,以表明由背景中的手指组织形成的强度分布可以作为柔软的生物分析来识别。然后,提出了两个指静脉背景层提取算法和三个软生物识别性提取算法,用于强度分布特征提取。最后,提出了一种混合匹配策略来解决初级和软生物识别性质之间的尺寸差异在得分水平上。三个开放式数据库的一系列严格对比实验表明,我们所提出的方法是手指静脉识别的可行和有效。
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在情感计算领域的基于生理信号的情感识别,已经支付了相当大的关注。对于可靠性和用户友好的采集,电卸电子活动(EDA)在实际应用中具有很大的优势。然而,基于EDA的情感识别与数百个科目仍然缺乏有效的解决方案。在本文中,我们的工作试图融合主题的各个EDA功能和外部诱发的音乐功能。我们提出了端到端的多模式框架,1维剩余时间和通道注意网络(RTCAN-1D)。对于EDA特征,基于新型的基于凸优化的EDA(CVXEDA)方法被应用于将EDA信号分解为PAHSIC和TONC信号,以进行动态和稳定的功能。首先涉及基于EDA的情感识别的渠道时间关注机制,以改善时间和渠道明智的表示。对于音乐功能,我们将音乐信号与开源工具包opensmile处理,以获取外部特征向量。来自EDA信号和来自音乐的外部情绪基准的个体情感特征在分类层中融合。我们对三个多模式数据集(PMEMO,DEAP,AMIGOS)进行了系统的比较,适用于2级薪酬/唤醒情感识别。我们提出的RTCAN-1D优于现有的最先进的模型,这也验证了我们的工作为大规模情感认可提供了可靠和有效的解决方案。我们的代码已在https://github.com/guanghaoyin/rtcan-1发布。
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Adding perturbations via utilizing auxiliary gradient information or discarding existing details of the benign images are two common approaches for generating adversarial examples. Though visual imperceptibility is the desired property of adversarial examples, conventional adversarial attacks still generate traceable adversarial perturbations. In this paper, we introduce a novel Adversarial Attack via Invertible Neural Networks (AdvINN) method to produce robust and imperceptible adversarial examples. Specifically, AdvINN fully takes advantage of the information preservation property of Invertible Neural Networks and thereby generates adversarial examples by simultaneously adding class-specific semantic information of the target class and dropping discriminant information of the original class. Extensive experiments on CIFAR-10, CIFAR-100, and ImageNet-1K demonstrate that the proposed AdvINN method can produce less imperceptible adversarial images than the state-of-the-art methods and AdvINN yields more robust adversarial examples with high confidence compared to other adversarial attacks.
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代码生成是一个长期的挑战,旨在根据自然语言描述生成代码段。通常,昂贵的文本编码配对数据对于培训代码生成模型至关重要。最近,由于培训预培训技术的成功,大型语言模型接受了大规模未标记的代码语料库的培训,并在代码生成方面表现良好。在本文中,我们调查了如何利用未标记的代码语料库来训练以图书馆为导向的代码生成的模型。由于对于程序员重复使用第三方库是一种普遍的做法,因此由于库数量大量,文本编码配对数据很难获得。我们观察到面向图书馆的代码片段更有可能共享类似的代码草图。因此,我们为证书提供了两个步骤:草图器生成草图,然后发电机填充了草图中的详细信息。 Sketcher和Generator都使用未标记的数据在基本模型上不断预先训练。此外,我们制作了两个名为Pandaseval和NumpyeVal的基准,以评估面向图书馆的代码生成。实验结果证明了CERT的表现令人印象深刻。例如,它超过了基本模型,在pandaseval上的Pass@1方面,绝对提高了15.67%。我们的工作可在https://github.com/microsoft/pycodegpt上获得。
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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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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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Graph Neural Networks (GNNs) have shown satisfying performance on various graph learning tasks. To achieve better fitting capability, most GNNs are with a large number of parameters, which makes these GNNs computationally expensive. Therefore, it is difficult to deploy them onto edge devices with scarce computational resources, e.g., mobile phones and wearable smart devices. Knowledge Distillation (KD) is a common solution to compress GNNs, where a light-weighted model (i.e., the student model) is encouraged to mimic the behavior of a computationally expensive GNN (i.e., the teacher GNN model). Nevertheless, most existing GNN-based KD methods lack fairness consideration. As a consequence, the student model usually inherits and even exaggerates the bias from the teacher GNN. To handle such a problem, we take initial steps towards fair knowledge distillation for GNNs. Specifically, we first formulate a novel problem of fair knowledge distillation for GNN-based teacher-student frameworks. Then we propose a principled framework named RELIANT to mitigate the bias exhibited by the student model. Notably, the design of RELIANT is decoupled from any specific teacher and student model structures, and thus can be easily adapted to various GNN-based KD frameworks. We perform extensive experiments on multiple real-world datasets, which corroborates that RELIANT achieves less biased GNN knowledge distillation while maintaining high prediction utility.
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This paper focuses on designing efficient models with low parameters and FLOPs for dense predictions. Even though CNN-based lightweight methods have achieved stunning results after years of research, trading-off model accuracy and constrained resources still need further improvements. This work rethinks the essential unity of efficient Inverted Residual Block in MobileNetv2 and effective Transformer in ViT, inductively abstracting a general concept of Meta-Mobile Block, and we argue that the specific instantiation is very important to model performance though sharing the same framework. Motivated by this phenomenon, we deduce a simple yet efficient modern \textbf{I}nverted \textbf{R}esidual \textbf{M}obile \textbf{B}lock (iRMB) for mobile applications, which absorbs CNN-like efficiency to model short-distance dependency and Transformer-like dynamic modeling capability to learn long-distance interactions. Furthermore, we design a ResNet-like 4-phase \textbf{E}fficient \textbf{MO}del (EMO) based only on a series of iRMBs for dense applications. Massive experiments on ImageNet-1K, COCO2017, and ADE20K benchmarks demonstrate the superiority of our EMO over state-of-the-art methods, \eg, our EMO-1M/2M/5M achieve 71.5, 75.1, and 78.4 Top-1 that surpass \textbf{SoTA} CNN-/Transformer-based models, while trading-off the model accuracy and efficiency well.
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