由于COVID-19，许多学校通过视频会议软件在线考试已经采用了许多学校。虽然方便，但教师要同时显示的学生变焦窗口监督在线考试是具有挑战性的。在本文中，我们提出了IEXAM，这是一种智能的在线考试监测和分析系统，不仅可以使用面部检测来帮助监护人实时学生识别，而且还可以检测到常见的异常行为（包括面部消失，旋转的面部，旋转的面部，旋转，，旋转，并在考试期间用另一个人替换）通过基于面部识别后的外观后视频分析。为了建立这样的新型系统，我们克服了三个挑战。首先，我们发现了一种轻巧的方法来捕获考试视频流并实时分析它们。其次，我们利用每个学生的变焦窗口上显示的左角名称，并提出了改进的OCR（光学角色识别）技术来自动收集具有动态位置的学生面孔的地面真相。第三，我们进行了几次实验比较和优化，以有效缩短教师PC所需的训练时间和测试时间。我们的评估表明，IEXAM可以实现高精度，实时面部检测为90.4％，后验后面部识别率为98.4％，同时保持可接受的运行时性能。我们已经在https://github.com/vprlab/iexam上提供了IEXAM的源代码。

面部检测和识别是人工智能系统中最困难，经常使用的任务。这项研究的目的是介绍和比较系统中使用的几种面部检测和识别算法的结果。该系统始于人类的训练图像，然后继续进行测试图像，识别面部，将其与受过训练的面部进行比较，最后使用OPENCV分类器对其进行分类。这项研究将讨论系统中使用的最有效，最成功的策略，这些策略是使用Python，OpenCV和Matplotlib实施的。它也可以用于CCTV的位置，例如公共场所，购物中心和ATM摊位。

The International Workshop on Reading Music Systems (WoRMS) is a workshop that tries to connect researchers who develop systems for reading music, such as in the field of Optical Music Recognition, with other researchers and practitioners that could benefit from such systems, like librarians or musicologists. The relevant topics of interest for the workshop include, but are not limited to: Music reading systems; Optical music recognition; Datasets and performance evaluation; Image processing on music scores; Writer identification; Authoring, editing, storing and presentation systems for music scores; Multi-modal systems; Novel input-methods for music to produce written music; Web-based Music Information Retrieval services; Applications and projects; Use-cases related to written music. These are the proceedings of the 3rd International Workshop on Reading Music Systems, held in Alicante on the 23rd of July 2021.

Video, as a key driver in the global explosion of digital information, can create tremendous benefits for human society. Governments and enterprises are deploying innumerable cameras for a variety of applications, e.g., law enforcement, emergency management, traffic control, and security surveillance, all facilitated by video analytics (VA). This trend is spurred by the rapid advancement of deep learning (DL), which enables more precise models for object classification, detection, and tracking. Meanwhile, with the proliferation of Internet-connected devices, massive amounts of data are generated daily, overwhelming the cloud. Edge computing, an emerging paradigm that moves workloads and services from the network core to the network edge, has been widely recognized as a promising solution. The resulting new intersection, edge video analytics (EVA), begins to attract widespread attention. Nevertheless, only a few loosely-related surveys exist on this topic. A dedicated venue for collecting and summarizing the latest advances of EVA is highly desired by the community. Besides, the basic concepts of EVA (e.g., definition, architectures, etc.) are ambiguous and neglected by these surveys due to the rapid development of this domain. A thorough clarification is needed to facilitate a consensus on these concepts. To fill in these gaps, we conduct a comprehensive survey of the recent efforts on EVA. In this paper, we first review the fundamentals of edge computing, followed by an overview of VA. The EVA system and its enabling techniques are discussed next. In addition, we introduce prevalent frameworks and datasets to aid future researchers in the development of EVA systems. Finally, we discuss existing challenges and foresee future research directions. We believe this survey will help readers comprehend the relationship between VA and edge computing, and spark new ideas on EVA.

在Covid-19爆发之后，作为最方便，最有效的预防手段，掩盖检测在流行病预防和控制中起着至关重要的作用。出色的自动实时面具检测系统可以减轻相关人员的大量工作压力。但是，通过分析现有的掩码检测方法，我们发现它们大多是资源密集型的，并且在速度和准确性之间无法达到良好的平衡。目前还没有完美的面膜数据集。在本文中，我们提出了一种用于掩盖检测的新体系结构。我们的系统使用SSD作为掩码定位器和分类器，并用MobilenetV2进一步替换VGG-16来提取图像的功能并减少许多参数。因此，我们的系统可以部署在嵌入式设备上。转移学习方法用于将预训练的模型从其他域转移到我们的模型。我们系统中的数据增强方法（例如混合）有效防止过度拟合。它还有效地减少了对大规模数据集的依赖性。通过在实际情况下进行实验，结果表明我们的系统在实时掩模检测中的表现良好。

The International Workshop on Reading Music Systems (WoRMS) is a workshop that tries to connect researchers who develop systems for reading music, such as in the field of Optical Music Recognition, with other researchers and practitioners that could benefit from such systems, like librarians or musicologists. The relevant topics of interest for the workshop include, but are not limited to: Music reading systems; Optical music recognition; Datasets and performance evaluation; Image processing on music scores; Writer identification; Authoring, editing, storing and presentation systems for music scores; Multi-modal systems; Novel input-methods for music to produce written music; Web-based Music Information Retrieval services; Applications and projects; Use-cases related to written music. These are the proceedings of the 2nd International Workshop on Reading Music Systems, held in Delft on the 2nd of November 2019.

2019年冠状病毒疾病（Covid-19）继续自爆发以来对世界产生巨大挑战。为了对抗这种疾病，开发了一系列人工智能（AI）技术，并应用于现实世界的情景，如安全监测，疾病诊断，感染风险评估，Covid-19 CT扫描的病变细分等。 Coronavirus流行病迫使人们佩戴面膜来抵消病毒的传播，这也带来了监控戴着面具的大群人群的困难。在本文中，我们主要关注蒙面面部检测和相关数据集的AI技术。从蒙面面部检测数据集的描述开始，我们调查了最近的进步。详细描述并详细讨论了十三可用数据集。然后，该方法大致分为两类：传统方法和基于神经网络的方法。常规方法通常通过用手工制作的特征升高算法来训练，该算法占少比例。基于神经网络的方法根据处理阶段的数量进一步归类为三个部分。详细描述了代表性算法，与一些简要描述的一些典型技术耦合。最后，我们总结了最近的基准测试结果，讨论了关于数据集和方法的局限性，并扩大了未来的研究方向。据我们所知，这是关于蒙面面部检测方法和数据集的第一次调查。希望我们的调查可以提供一些帮助对抗流行病的帮助。

在过去的十年中，电子学习已经彻底改变了学生通过随时随地获得素质教育的学习方式。然而，由于各种原因，学生经常会分心，这在很大程度上影响了学习能力。许多研究人员一直在努力提高在线教育的质量，但我们需要一个整体方法来解决这个问题。本文打算提供一种机制，该机制使用相机馈送和麦克风输入来监测在线类别期间学生的实时关注水平。我们探讨了本研究的各种图像处理技术和机器学习算法。我们提出了一个系统，它使用五个不同的非语言特征来计算基于计算机的任务期间学生的注意得分，并为学生和组织生成实时反馈。我们可以使用所产生的反馈作为启发式价值，以分析学生的整体性能以及讲师的教学标准。

这项工作代表了沉浸式数字学习平台的系统面部表达识别和面部压力分析算法的实验和开发过程。该系统从用户网络摄像头检索，并使用人工神经网络（ANN）算法对其进行评估。 ANN输出信号可用于评分和改进学习过程。将ANN适应新系统可能需要大量的实施工作或重复ANN培训。还存在与运行ANN所需的最小硬件有关的局限性。为了使这些限制超过这些约束，提出了一些可能的面部表达识别和面部压力分析算法的实现。新解决方案的实施使得提高识别面部表情的准确性并提高其响应速度成为可能。实验结果表明，与社交设备相比，使用开发的算法可以以更高的速度检测心率。

最近，面部生物识别是对传统认证系统的方便替代的巨大关注。因此，检测恶意尝试已经发现具有重要意义，导致面部抗欺骗〜（FAS），即面部呈现攻击检测。与手工制作的功能相反，深度特色学习和技术已经承诺急剧增加FAS系统的准确性，解决了实现这种系统的真实应用的关键挑战。因此，处理更广泛的发展以及准确的模型的新研究区越来越多地引起了研究界和行业的关注。在本文中，我们为自2017年以来对与基于深度特征的FAS方法相关的文献综合调查。在这一主题上阐明，基于各种特征和学习方法的语义分类。此外，我们以时间顺序排列，其进化进展和评估标准（数据集内集和数据集互联集合中集）覆盖了FAS的主要公共数据集。最后，我们讨论了开放的研究挑战和未来方向。

海洋生态系统及其鱼类栖息地越来越重要，因为它们在提供有价值的食物来源和保护效果方面的重要作用。由于它们的偏僻且难以接近自然，因此通常使用水下摄像头对海洋环境和鱼类栖息地进行监测。这些相机产生了大量数字数据，这些数据无法通过当前的手动处理方法有效地分析，这些方法涉及人类观察者。 DL是一种尖端的AI技术，在分析视觉数据时表现出了前所未有的性能。尽管它应用于无数领域，但仍在探索其在水下鱼类栖息地监测中的使用。在本文中，我们提供了一个涵盖DL的关键概念的教程，该教程可帮助读者了解对DL的工作原理的高级理解。该教程还解释了一个逐步的程序，讲述了如何为诸如水下鱼类监测等挑战性应用开发DL算法。此外，我们还提供了针对鱼类栖息地监测的关键深度学习技术的全面调查，包括分类，计数，定位和细分。此外，我们对水下鱼类数据集进行了公开调查，并比较水下鱼类监测域中的各种DL技术。我们还讨论了鱼类栖息地加工深度学习的新兴领域的一些挑战和机遇。本文是为了作为希望掌握对DL的高级了解，通过遵循我们的分步教程而为其应用开发的海洋科学家的教程，并了解如何发展其研究，以促进他们的研究。努力。同时，它适用于希望调查基于DL的最先进方法的计算机科学家，以进行鱼类栖息地监测。

技术的改进与时间和时间相关的问题线性相关。已经看到，随着时间的推移，人类面临的问题数量也会增加。然而，解决这些问题的技术也往往会改善。最早的现有问题之一开始于车辆的发明内容是停车位。多年来，使用技术的易于解决这个问题已经发展，但停车问题仍然仍未解决。这背后的主要原因是停车不仅涉及一个问题，而且它包括一系列问题。其中一个问题是分布式停车生态系统中停车槽的占用检测。在分布式系统中，用户将找到优选的停车位，而不是随机停车位。在本文中，我们将基于Web的应用提出了一种用于在不同停车位停车空间检测的解决方案。该解决方案基于计算机视觉（CV），并使用Python 3.0中编写的Django框架构建。解决方案用于解决占用检测问题以及提供用户基于可用性和偏好确定块的选项。我们提出的系统的评估结果是有前途和有效的。所提出的系统也可以与不同的系统集成，并用于解决其他相关停车问题。

Identity authentication is the process of verifying one's identity. There are several identity authentication methods, among which biometric authentication is of utmost importance. Facial recognition is a sort of biometric authentication with various applications, such as unlocking mobile phones and accessing bank accounts. However, presentation attacks pose the greatest threat to facial recognition. A presentation attack is an attempt to present a non-live face, such as a photo, video, mask, and makeup, to the camera. Presentation attack detection is a countermeasure that attempts to identify between a genuine user and a presentation attack. Several industries, such as financial services, healthcare, and education, use biometric authentication services on various devices. This illustrates the significance of presentation attack detection as the verification step. In this paper, we study state-of-the-art to cover the challenges and solutions related to presentation attack detection in a single place. We identify and classify different presentation attack types and identify the state-of-the-art methods that could be used to detect each of them. We compare the state-of-the-art literature regarding attack types, evaluation metrics, accuracy, and datasets and discuss research and industry challenges of presentation attack detection. Most presentation attack detection approaches rely on extensive data training and quality, making them difficult to implement. We introduce an efficient active presentation attack detection approach that overcomes weaknesses in the existing literature. The proposed approach does not require training data, is CPU-light, can process low-quality images, has been tested with users of various ages and is shown to be user-friendly and highly robust to 2-dimensional presentation attacks.

我们提出了一种新的四管齐下的方法，在文献中首次建立消防员的情境意识。我们构建了一系列深度学习框架，彼此之叠，以提高消防员在紧急首次响应设置中进行的救援任务的安全性，效率和成功完成。首先，我们使用深度卷积神经网络（CNN）系统，以实时地分类和识别来自热图像的感兴趣对象。接下来，我们将此CNN框架扩展了对象检测，跟踪，分割与掩码RCNN框架，以及具有多模级自然语言处理（NLP）框架的场景描述。第三，我们建立了一个深入的Q学习的代理，免受压力引起的迷失方向和焦虑，能够根据现场消防环境中观察和存储的事实来制定明确的导航决策。最后，我们使用了一种低计算无监督的学习技术，称为张量分解，在实时对异常检测进行有意义的特征提取。通过这些临时深度学习结构，我们建立了人工智能系统的骨干，用于消防员的情境意识。要将设计的系统带入消防员的使用，我们设计了一种物理结构，其中处理后的结果被用作创建增强现实的投入，这是一个能够建议他们所在地的消防员和周围的关键特征，这对救援操作至关重要在手头，以及路径规划功能，充当虚拟指南，以帮助迷彩的第一个响应者恢复安全。当组合时，这四种方法呈现了一种新颖的信息理解，转移和综合方法，这可能会大大提高消防员响应和功效，并降低寿命损失。

Due to object detection's close relationship with video analysis and image understanding, it has attracted much research attention in recent years. Traditional object detection methods are built on handcrafted features and shallow trainable architectures. Their performance easily stagnates by constructing complex ensembles which combine multiple low-level image features with high-level context from object detectors and scene classifiers. With the rapid development in deep learning, more powerful tools, which are able to learn semantic, high-level, deeper features, are introduced to address the problems existing in traditional architectures. These models behave differently in network architecture, training strategy and optimization function, etc. In this paper, we provide a review on deep learning based object detection frameworks. Our review begins with a brief introduction on the history of deep learning and its representative tool, namely Convolutional Neural Network (CNN). Then we focus on typical generic object detection architectures along with some modifications and useful tricks to improve detection performance further. As distinct specific detection tasks exhibit different characteristics, we also briefly survey several specific tasks, including salient object detection, face detection and pedestrian detection. Experimental analyses are also provided to compare various methods and draw some meaningful conclusions. Finally, several promising directions and tasks are provided to serve as guidelines for future work in both object detection and relevant neural network based learning systems.

Current learning machines have successfully solved hard application problems, reaching high accuracy and displaying seemingly "intelligent" behavior. Here we apply recent techniques for explaining decisions of state-of-the-art learning machines and analyze various tasks from computer vision and arcade games. This showcases a spectrum of problem-solving behaviors ranging from naive and short-sighted, to wellinformed and strategic. We observe that standard performance evaluation metrics can be oblivious to distinguishing these diverse problem solving behaviors. Furthermore, we propose our semi-automated Spectral Relevance Analysis that provides a practically effective way of characterizing and validating the behavior of nonlinear learning machines. This helps to assess whether a learned model indeed delivers reliably for the problem that it was conceived for. Furthermore, our work intends to add a voice of caution to the ongoing excitement about machine intelligence and pledges to evaluate and judge some of these recent successes in a more nuanced manner.

VirtualCube系统是一个尝试克服传统技术的一些限制的3D视频会议系统。关键的成分是VirtualCube，一种用RGBD摄像机录制的现实世界隔间的抽象表示，用于捕获用户的3D几何和纹理。我们设计VirtualCube，以便数据捕获的任务是标准化和显着简化的，并且所有内容都可以使用现成的硬件构建。我们将VirtualCubes用作虚拟会议环境的基本构建块，我们为每个VirtualCube用户提供一个周围的显示，显示远程参与者的寿命型视频。为了实现远程参与者的实时渲染，我们开发了V-Cube视图算法，它使用多视图立体声进行更精确的深度估计和Lumi-Net渲染，以便更好地渲染质量。 VirtualCube系统正确保留了参与者之间的相互眼睛凝视，使他们能够建立目光接触并意识到谁在视觉上关注它们。该系统还允许参与者与远程参与者具有侧面讨论，就像他们在同一个房间一样。最后，系统揭示了如何支持如何支持工作项的共享空间（例如，文档和应用程序），并跟踪参与者的视觉注意工作项目。

The emergence of COVID-19 has had a global and profound impact, not only on society as a whole, but also on the lives of individuals. Various prevention measures were introduced around the world to limit the transmission of the disease, including face masks, mandates for social distancing and regular disinfection in public spaces, and the use of screening applications. These developments also triggered the need for novel and improved computer vision techniques capable of (i) providing support to the prevention measures through an automated analysis of visual data, on the one hand, and (ii) facilitating normal operation of existing vision-based services, such as biometric authentication schemes, on the other. Especially important here, are computer vision techniques that focus on the analysis of people and faces in visual data and have been affected the most by the partial occlusions introduced by the mandates for facial masks. Such computer vision based human analysis techniques include face and face-mask detection approaches, face recognition techniques, crowd counting solutions, age and expression estimation procedures, models for detecting face-hand interactions and many others, and have seen considerable attention over recent years. The goal of this survey is to provide an introduction to the problems induced by COVID-19 into such research and to present a comprehensive review of the work done in the computer vision based human analysis field. Particular attention is paid to the impact of facial masks on the performance of various methods and recent solutions to mitigate this problem. Additionally, a detailed review of existing datasets useful for the development and evaluation of methods for COVID-19 related applications is also provided. Finally, to help advance the field further, a discussion on the main open challenges and future research direction is given.

从卷积神经网络的快速发展中受益，汽车牌照检测和识别的性能得到了很大的改善。但是，大多数现有方法分别解决了检测和识别问题，并专注于特定方案，这阻碍了现实世界应用的部署。为了克服这些挑战，我们提出了一个有效而准确的框架，以同时解决车牌检测和识别任务。这是一个轻巧且统一的深神经网络，可以实时优化端到端。具体而言，对于不受约束的场景，采用了无锚方法来有效检测车牌的边界框和四个角，这些框用于提取和纠正目标区域特征。然后，新型的卷积神经网络分支旨在进一步提取角色的特征而不分割。最后，将识别任务视为序列标记问题，这些问题通过连接派时间分类（CTC）解决。选择了几个公共数据集，包括在各种条件下从不同方案中收集的图像进行评估。实验结果表明，所提出的方法在速度和精度上都显着优于先前的最新方法。

培训和测试监督对象检测模型需要大量带有地面真相标签的图像。标签定义图像中的对象类及其位置，形状以及可能的其他信息，例如姿势。即使存在人力，标签过程也非常耗时。我们引入了一个新的标签工具，用于2D图像以及3D三角网格：3D标记工具（3DLT）。这是一个独立的，功能丰富和跨平台软件，不需要安装，并且可以在Windows，MacOS和基于Linux的发行版上运行。我们不再像当前工具那样在每个图像上分别标记相同的对象，而是使用深度信息从上述图像重建三角形网格，并仅在上述网格上标记一次对象。我们使用注册来简化3D标记，离群值检测来改进2D边界框的计算和表面重建，以将标记可能性扩展到大点云。我们的工具经过最先进的方法测试，并且在保持准确性和易用性的同时，它极大地超过了它们。