由于多个实际应用,全自动车牌识别(ALPR)一直是一个经常研究的主题。但是,在实际情况下,许多当前的解决方案仍然不够强大,通常取决于许多限制。本文提出了一个基于最先进的Yolo对象检测器和标准化流量的强大而有效的ALPR系统。该模型使用两种新策略。首先,使用YOLO的两阶段网络和基于标准化的基于归一化的模型来检测许可板(LP)并识别具有数字和阿拉伯字符的LP。其次,实施了多尺度图像转换,以解决Yolo裁剪LP检测问题的问题,包括明显的背景噪声。此外,在具有现实情况的新数据集中,我们引入了一个更大的公共注释数据集,该数据集从摩洛哥板上收集到了更大的公共注释数据集。我们证明我们提出的模型可以在没有单个或多个字符的少数样品上学习。该数据集还将公开使用,以鼓励对板检测和识别进行进一步的研究和研究。
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为了更好地利用搜索日志和建模用户的行为模式,提出了许多点击模型来提取用户的隐式交互反馈。大多数传统点击模型都是基于概率图形模型(PGM)框架,该框架需要手动设计的依赖项,并且可能会过度简化用户行为。最近,提出了基于神经网络的方法来通过增强表达能力并允许灵活的依赖性来提高用户行为的预测准确性。但是,他们仍然遭受数据稀疏性和冷启动问题的困扰。在本文中,我们提出了一个新颖的图形增强点击模型(GraphCM),用于Web搜索。首先,我们将每个查询或文档视为顶点,并分别针对查询和文档提出新颖的均匀图构造方法,以完全利用会议内和会议间信息,以解决稀疏性和冷启动问题。其次,在考试假设之后,我们分别对吸引力估计量和检查预测值进行了建模,以输出吸引力得分和检查概率,在该分数中,应用图形神经网络和邻居相互作用技术用于提取在预构建的同质图中编码的辅助信息。最后,我们将组合功能应用于将考试概率和吸引力得分整合到点击预测中。在三个现实世界会话数据集上进行的广泛实验表明,GraphCM不仅胜过了最先进的模型,而且还可以在解决数据稀疏性和冷启动问题方面取得卓越的性能。
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语言模型既展示了定量的改进,又展示了新的定性功能,随着规模的增加。尽管它们具有潜在的变革性影响,但这些新能力的特征却很差。为了为未来的研究提供信息,为破坏性的新模型能力做准备,并改善社会有害的效果,至关重要的是,我们必须了解目前和近乎未来的能力和语言模型的局限性。为了应对这一挑战,我们介绍了超越模仿游戏基准(Big Bench)。 Big Bench目前由204个任务组成,由132家机构的442位作者贡献。任务主题是多样的,从语言学,儿童发展,数学,常识性推理,生物学,物理学,社会偏见,软件开发等等。 Big-Bench专注于被认为超出当前语言模型的功能的任务。我们评估了OpenAI的GPT型号,Google内部密集变压器体系结构和大型基础上的开关稀疏变压器的行为,跨越了数百万到数十亿个参数。此外,一个人类专家评估者团队执行了所有任务,以提供强大的基准。研究结果包括:模型性能和校准都随规模改善,但绝对的术语(以及与评估者的性能相比);在模型类中的性能非常相似,尽管带有稀疏性。逐渐和预测的任务通常涉及大量知识或记忆成分,而在临界规模上表现出“突破性”行为的任务通常涉及多个步骤或组成部分或脆性指标;社交偏见通常会随着含糊不清的环境而随着规模而增加,但这可以通过提示来改善。
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高赌注域的机器学习模型制作的算法决策可能随着时间的推移而持久影响。不幸的是,静态环境中的标准公平标准的天真在时间域中的静态设置可能导致延迟和不利影响。要了解性能差异的动态,我们研究马尔可夫决策过程(MDP)的公平问题。具体而言,我们提出了返回奇偶校验,这是一个公平的概念,需要来自不同的人口统计组的MDP,这些组共享相同的状态和行动空间,以实现大致相同的预期折扣奖励。我们首先为返回差异提供分解定理,它将任何两个MDP的返回差异分解为组明智奖励函数,组政策的差异的差异,以及组政策所引起的国家探索分布之间的差异。通过我们的分解定理激励,我们提出了通过使用积分概率度量的状态探索分布对齐进行共享组策略来减轻返回差异的算法。我们进行实验以证实我们的结果,表明该算法可以成功地关闭视差差距,同时保持对两个现实世界推荐系统基准数据集的策略性能。
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When using LiDAR semantic segmentation models for safety-critical applications such as autonomous driving, it is essential to understand and improve their robustness with respect to a large range of LiDAR corruptions. In this paper, we aim to comprehensively analyze the robustness of LiDAR semantic segmentation models under various corruptions. To rigorously evaluate the robustness and generalizability of current approaches, we propose a new benchmark called SemanticKITTI-C, which features 16 out-of-domain LiDAR corruptions in three groups, namely adverse weather, measurement noise and cross-device discrepancy. Then, we systematically investigate 11 LiDAR semantic segmentation models, especially spanning different input representations (e.g., point clouds, voxels, projected images, and etc.), network architectures and training schemes. Through this study, we obtain two insights: 1) We find out that the input representation plays a crucial role in robustness. Specifically, under specific corruptions, different representations perform variously. 2) Although state-of-the-art methods on LiDAR semantic segmentation achieve promising results on clean data, they are less robust when dealing with noisy data. Finally, based on the above observations, we design a robust LiDAR segmentation model (RLSeg) which greatly boosts the robustness with simple but effective modifications. It is promising that our benchmark, comprehensive analysis, and observations can boost future research in robust LiDAR semantic segmentation for safety-critical applications.
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In recent years, arbitrary image style transfer has attracted more and more attention. Given a pair of content and style images, a stylized one is hoped that retains the content from the former while catching style patterns from the latter. However, it is difficult to simultaneously keep well the trade-off between the content details and the style features. To stylize the image with sufficient style patterns, the content details may be damaged and sometimes the objects of images can not be distinguished clearly. For this reason, we present a new transformer-based method named STT for image style transfer and an edge loss which can enhance the content details apparently to avoid generating blurred results for excessive rendering on style features. Qualitative and quantitative experiments demonstrate that STT achieves comparable performance to state-of-the-art image style transfer methods while alleviating the content leak problem.
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With the increasing ability of large language models (LLMs), in-context learning (ICL) has become a new paradigm for natural language processing (NLP), where LLMs make predictions only based on contexts augmented with a few training examples. It has been a new trend exploring ICL to evaluate and extrapolate the ability of LLMs. In this paper, we aim to survey and summarize the progress, challenges, and future work in ICL. We first present a formal definition of ICL and clarify its correlation to related studies. Then, we organize and discuss advanced techniques of ICL, including training strategies, prompting strategies, and so on. Finally, we present the challenges of ICL and provide potential directions for further research. We hope our work can encourage more research on uncovering how ICL works and improving ICL in future work.
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Gaze estimation is the fundamental basis for many visual tasks. Yet, the high cost of acquiring gaze datasets with 3D annotations hinders the optimization and application of gaze estimation models. In this work, we propose a novel Head-Eye redirection parametric model based on Neural Radiance Field, which allows dense gaze data generation with view consistency and accurate gaze direction. Moreover, our head-eye redirection parametric model can decouple the face and eyes for separate neural rendering, so it can achieve the purpose of separately controlling the attributes of the face, identity, illumination, and eye gaze direction. Thus diverse 3D-aware gaze datasets could be obtained by manipulating the latent code belonging to different face attributions in an unsupervised manner. Extensive experiments on several benchmarks demonstrate the effectiveness of our method in domain generalization and domain adaptation for gaze estimation tasks.
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Generalizability to unseen forgery types is crucial for face forgery detectors. Recent works have made significant progress in terms of generalization by synthetic forgery data augmentation. In this work, we explore another path for improving the generalization. Our goal is to reduce the features that are easy to learn in the training phase, so as to reduce the risk of overfitting on specific forgery types. Specifically, in our method, a teacher network takes as input the face images and generates an attention map of the deep features by a diverse multihead attention ViT. The attention map is used to guide a student network to focus on the low-attended features by reducing the highly-attended deep features. A deep feature mixup strategy is also proposed to synthesize forgeries in the feature domain. Experiments demonstrate that, without data augmentation, our method is able to achieve promising performances on unseen forgeries and highly compressed data.
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The development of deep learning models in medical image analysis is majorly limited by the lack of large-sized and well-annotated datasets. Unsupervised learning does not require labels and is more suitable for solving medical image analysis problems. However, most of the current unsupervised learning methods need to be applied to large datasets. To make unsupervised learning applicable to small datasets, we proposed Swin MAE, which is a masked autoencoder with Swin Transformer as its backbone. Even on a dataset of only a few thousand medical images and without using any pre-trained models, Swin MAE is still able to learn useful semantic features purely from images. It can equal or even slightly outperform the supervised model obtained by Swin Transformer trained on ImageNet in terms of the transfer learning results of downstream tasks. The code will be publicly available soon.
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