How do we know when the predictions made by a classifier can be trusted? This is a fundamental problem that also has immense practical applicability, especially in safety-critical areas such as medicine and autonomous driving. The de facto approach of using the classifier's softmax outputs as a proxy for trustworthiness suffers from the over-confidence issue; while the most recent works incur problems such as additional retraining cost and accuracy versus trustworthiness trade-off. In this work, we argue that the trustworthiness of a classifier's prediction for a sample is highly associated with two factors: the sample's neighborhood information and the classifier's output. To combine the best of both worlds, we design a model-agnostic post-hoc approach NeighborAgg to leverage the two essential information via an adaptive neighborhood aggregation. Theoretically, we show that NeighborAgg is a generalized version of a one-hop graph convolutional network, inheriting the powerful modeling ability to capture the varying similarity between samples within each class. We also extend our approach to the closely related task of mislabel detection and provide a theoretical coverage guarantee to bound the false negative. Empirically, extensive experiments on image and tabular benchmarks verify our theory and suggest that NeighborAgg outperforms other methods, achieving state-of-the-art trustworthiness performance.
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Arbitrary style transfer (AST) transfers arbitrary artistic styles onto content images. Despite the recent rapid progress, existing AST methods are either incapable or too slow to run at ultra-resolutions (e.g., 4K) with limited resources, which heavily hinders their further applications. In this paper, we tackle this dilemma by learning a straightforward and lightweight model, dubbed MicroAST. The key insight is to completely abandon the use of cumbersome pre-trained Deep Convolutional Neural Networks (e.g., VGG) at inference. Instead, we design two micro encoders (content and style encoders) and one micro decoder for style transfer. The content encoder aims at extracting the main structure of the content image. The style encoder, coupled with a modulator, encodes the style image into learnable dual-modulation signals that modulate both intermediate features and convolutional filters of the decoder, thus injecting more sophisticated and flexible style signals to guide the stylizations. In addition, to boost the ability of the style encoder to extract more distinct and representative style signals, we also introduce a new style signal contrastive loss in our model. Compared to the state of the art, our MicroAST not only produces visually superior results but also is 5-73 times smaller and 6-18 times faster, for the first time enabling super-fast (about 0.5 seconds) AST at 4K ultra-resolutions. Code is available at https://github.com/EndyWon/MicroAST.
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最近的研究表明,通用风格转移的成功取得了巨大的成功,将任意视觉样式转移到内容图像中。但是,现有的方法遭受了审美的非现实主义问题,该问题引入了不和谐的模式和明显的人工制品,从而使结果很容易从真实的绘画中发现。为了解决这一限制,我们提出了一种新颖的美学增强风格转移方法,可以在美学上为任意风格产生更现实和令人愉悦的结果。具体而言,我们的方法引入了一种审美歧视者,以从大量的艺术家创造的绘画中学习通用的人类自愿美学特征。然后,合并了美学特征,以通过新颖的美学感知样式(AESSA)模块来增强样式转移过程。这样的AESSA模块使我们的Aesust能够根据样式图像的全局美学通道分布和内容图像的局部语义空间分布有效而灵活地集成样式模式。此外,我们还开发了一种新的两阶段转移培训策略,并通过两种审美正规化来更有效地训练我们的模型,从而进一步改善风格化的性能。广泛的实验和用户研究表明,我们的方法比艺术的状态综合了美学上更加和谐和现实的结果,从而大大缩小了真正的艺术家创造的绘画的差异。我们的代码可在https://github.com/endywon/aesust上找到。
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在本文中,我们介绍了纹理改革器,一个快速和通用的神经基础框架,用于使用用户指定的指导进行交互式纹理传输。挑战在三个方面:1)任务的多样性,2)引导图的简单性,以及3)执行效率。为了解决这些挑战,我们的主要思想是使用由i)全球视图结构对准阶段,ii)局部视图纹理细化阶段和III)的新的前馈多视图和多级合成程序。效果增强阶段用相干结构合成高质量结果,并以粗略的方式进行细纹细节。此外,我们还介绍了一种新颖的无学习视图特定的纹理改革(VSTR)操作,具有新的语义地图指导策略,以实现更准确的语义引导和结构保存的纹理传输。关于各种应用场景的实验结果展示了我们框架的有效性和优越性。并与最先进的交互式纹理转移算法相比,它不仅可以实现更高的质量结果,而且更加显着,也是更快的2-5个数量级。代码可在https://github.com/endywon/texture --reformer中找到。
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在所需的姿势中绘制人物的图像是动漫制作中必不可少但费力的任务。在本文中,我们介绍了协作神经渲染〜(CONR)方法,以从字符表中可用的一些任意摆姿势的参考图像中创建新图像。通常,动漫人物的身体形状的高度多样性违反了像SMPL这样的现实世界人体的普遍身体模型的利用。为了克服这个困难,Conr使用紧凑且易于攻击的地标编码,以避免在管道中创建统一的紫外线映射。此外,使用特征空间跨视图密集的对应关系和翘曲在特殊设计的神经网络构建体中使用多个参考图像时,Conr的性能可以显着提高。此外,我们收集了一个字符表数据集,该数据集包含700,000多个手绘和合成的姿势图像,以促进该领域的研究。
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本文报告了我们针对多媒体VICO 2022对话式头部生成挑战的解决方案,该挑战旨在根据音频和参考图像生成生动的面对面对话视频。我们的解决方案专注于使用正则化并组装高视觉质量渲染器的广义音频对手驱动器。我们仔细调整了行为的音频模型,并使用我们的前后背景融合模块进行后制作视频。我们在官方排名中的Talking Head Generation Track中获得了聆听校长曲目的第一名。我们的代码将发布。
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求职面试通常是高风险的社交场所,需要专业和行为技巧才能令人满意。专业的工作面试培训师会根据公共标准提供有关显示行为的教育反馈。对于提高工作面试所需的行为技能,这种反馈可能会有所帮助。产生此类反馈的技术方法可能是工作面试培训的嬉戏且低调的起点。因此,我们通过基于生成的对抗网络(GAN)的方法扩展了交互式虚拟工作面试培训系统,该方法首先检测到行为弱点并随后产生个性化的反馈。为了评估生成的反馈的有用性,我们使用求职培训系统的模型进行了一项混合方法试点研究。总体研究结果表明,基于GAN的产生的行为反馈很有帮助。此外,参与者评估反馈将改善他们的工作面试绩效。
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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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