LiDAR mapping is important yet challenging in self-driving and mobile robotics. To tackle such a global point cloud registration problem, DeepMapping converts the complex map estimation into a self-supervised training of simple deep networks. Despite its broad convergence range on small datasets, DeepMapping still cannot produce satisfactory results on large-scale datasets with thousands of frames. This is due to the lack of loop closures and exact cross-frame point correspondences, and the slow convergence of its global localization network. We propose DeepMapping2 by adding two novel techniques to address these issues: (1) organization of training batch based on map topology from loop closing, and (2) self-supervised local-to-global point consistency loss leveraging pairwise registration. Our experiments and ablation studies on public datasets (KITTI, NCLT, and Nebula) demonstrate the effectiveness of our method. Our code will be released.

During the deployment of deep neural networks (DNNs) on edge devices, many research efforts are devoted to the limited hardware resource. However, little attention is paid to the influence of dynamic power management. As edge devices typically only have a budget of energy with batteries (rather than almost unlimited energy support on servers or workstations), their dynamic power management often changes the execution frequency as in the widely-used dynamic voltage and frequency scaling (DVFS) technique. This leads to highly unstable inference speed performance, especially for computation-intensive DNN models, which can harm user experience and waste hardware resources. We firstly identify this problem and then propose All-in-One, a highly representative pruning framework to work with dynamic power management using DVFS. The framework can use only one set of model weights and soft masks (together with other auxiliary parameters of negligible storage) to represent multiple models of various pruning ratios. By re-configuring the model to the corresponding pruning ratio for a specific execution frequency (and voltage), we are able to achieve stable inference speed, i.e., keeping the difference in speed performance under various execution frequencies as small as possible. Our experiments demonstrate that our method not only achieves high accuracy for multiple models of different pruning ratios, but also reduces their variance of inference latency for various frequencies, with minimal memory consumption of only one model and one soft mask.

The security of artificial intelligence (AI) is an important research area towards safe, reliable, and trustworthy AI systems. To accelerate the research on AI security, the Artificial Intelligence Security Competition (AISC) was organized by the Zhongguancun Laboratory, China Industrial Control Systems Cyber Emergency Response Team, Institute for Artificial Intelligence, Tsinghua University, and RealAI as part of the Zhongguancun International Frontier Technology Innovation Competition (https://www.zgc-aisc.com/en). The competition consists of three tracks, including Deepfake Security Competition, Autonomous Driving Security Competition, and Face Recognition Security Competition. This report will introduce the competition rules of these three tracks and the solutions of top-ranking teams in each track.

Image super-resolution is a common task on mobile and IoT devices, where one often needs to upscale and enhance low-resolution images and video frames. While numerous solutions have been proposed for this problem in the past, they are usually not compatible with low-power mobile NPUs having many computational and memory constraints. In this Mobile AI challenge, we address this problem and propose the participants to design an efficient quantized image super-resolution solution that can demonstrate a real-time performance on mobile NPUs. The participants were provided with the DIV2K dataset and trained INT8 models to do a high-quality 3X image upscaling. The runtime of all models was evaluated on the Synaptics VS680 Smart Home board with a dedicated edge NPU capable of accelerating quantized neural networks. All proposed solutions are fully compatible with the above NPU, demonstrating an up to 60 FPS rate when reconstructing Full HD resolution images. A detailed description of all models developed in the challenge is provided in this paper.

在统一功能对应模型中建模稀疏和致密的图像匹配最近引起了研究的兴趣。但是，现有的努力主要集中于提高匹配的准确性，同时忽略其效率，这对于现实世界的应用至关重要。在本文中，我们提出了一种有效的结构，该结构以粗到精细的方式找到对应关系，从而显着提高了功能对应模型的效率。为了实现这一目标，多个变压器块是阶段范围连接的，以逐步完善共享的多尺度特征提取网络上的预测坐标。给定一对图像和任意查询坐标，所有对应关系均在单个进纸传球内预测。我们进一步提出了一种自适应查询聚类策略和基于不确定性的离群检测模块，以与提出的框架合作，以进行更快，更好的预测。对各种稀疏和密集的匹配任务进行的实验证明了我们方法在效率和有效性上对现有的最新作品的优势。

有效的缩放和灵活的任务接口使大型语言模型能够在许多任务中表现出色。帕利（Pali）根据视觉和文本输入生成文本，并使用该界面以许多语言执行许多视觉，语言和多模式任务。为了训练帕利，我们利用了大型的编码器语言模型和视觉变压器（VITS）。这使我们能够利用其现有能力，并利用培训它们的大量成本。我们发现，视觉和语言组成部分的联合缩放很重要。由于现有的语言变压器比其视觉对应物要大得多，因此我们训练迄今为止最大的VIT（VIT-E），以量化甚至大容量视觉模型的好处。为了训练Pali，我们基于一个新的图像文本训练集，其中包含10B图像和文本，以100多种语言来创建大型的多语言组合。帕利（Pali）在多个视觉和语言任务（例如字幕，视觉问题，索方式，场景文本理解）中实现了最新的，同时保留了简单，模块化和可扩展的设计。

传统的联邦优化方法的性能较差（即降低准确性），尤其是对于高度偏斜的数据。在本文中，我们调查了佛罗里达州的标签分布偏斜，在那里标签的分布各不相同。首先，我们从统计视图研究了标签分布偏斜。我们在理论上和经验上都证明了基于软马克斯跨凝结的先前方法不合适，这可能会导致本地模型非常适合少数群体和缺失的类别。此外，我们从理论上引入了一个偏离，以测量本地更新后梯度的偏差。最后，我们建议通过\ textbf {l} ogits \ textbf {c}启动）FedLc（\ textbf {fed {fed}学习，该学习根据每个类别的出现可能性。 FedLC通过添加成对标签的边距将细粒度校准的跨透镜损失应用于本地更新。联合数据集和现实世界数据集的广泛实验表明，联邦快递会导致更准确的全球模型和大大改善的性能。此外，将其他FL方法集成到我们的方法中可以进一步增强全球模型的性能。

使用深网的Visual Place识别（VPR）已达到最先进的性能。但是，他们中的大多数都需要采用地面真相传感器姿势的培训，以获取每个观察的空间邻里的正面和负面样本，以进行监督学习。当不可用的信息不可用时，尽管我们发现其性能次优训练，但可以利用从顺序收集的数据流中的时间社区进行自我监督训练。受嘈杂的标签学习的启发，我们提出了一个名为\ textit {tf-vpr}的新颖的自我监督框架，该框架使用时间社区和可学习的特征邻域来发现未知的空间社区。我们的方法遵循一个迭代训练范式，该范式在以下方面交替：（1）与数据增强的表示学习，（2）正设置扩展以包括当前的特征空间邻居，以及（3）通过几何验证进行正面集合。我们在模拟数据集和真实数据集上进行了全面的实验，将RGB图像或点云作为输入进行。结果表明，我们的方法在召回率，稳健性和标题多样性方面优于我们的基准，这是我们为VPR提出的新型指标。可以在https://ai4ce.github.io/tf-vpr/上找到我们的代码和数据集。

一对一的匹配是DETR建立其端到端功能的关键设计，因此对象检测不需要手工制作的NMS（非最大抑制）方法来删除重复检测。这种端到端的签名对于DETR的多功能性很重要，并且已将其推广到广泛的视觉问题，包括实例/语义分割，人体姿势估计以及基于点云/多视图的检测，但是，我们注意到，由于分配为正样本的查询太少，因此一对一的匹配显着降低了阳性样品的训练效率。本文提出了一种基于混合匹配方案的简单而有效的方法，该方法将原始的一对一匹配分支与辅助查询结合在一起，这些查询在训练过程中使用一对一的匹配损失。该混合策略已被证明可显着提高训练效率并提高准确性。在推断中，仅使用原始的一对一匹配分支，从而维持端到端的优点和相同的DETR推断效率。该方法命名为$ \ MATHCAL {H} $ - DETR，它表明可以在各种视觉任务中始终如一地改进各种代表性的DITR方法，包括可变形，3DDER/PETRV2，PETR和TRANDRACK， ，其他。代码将在以下网址提供：https：//github.com/hdetr

现有视频超分辨率（VSR）算法的成功主要是从相邻框架中利用时间信息。但是，这些方法都没有讨论带有固定物体和背景的贴片中时间冗余的影响，并且通常使用相邻框架中的所有信息而没有任何歧视。在本文中，我们观察到时间冗余将对信息传播产生不利影响，这限制了最现有的VSR方法的性能。在这一观察结果的推动下，我们旨在通过以优化的方式处理时间冗余贴片来改善现有的VSR算法。我们开发了两种简单但有效的插件方法，以提高广泛使用的公共视频中现有的本地和非本地传播算法的性能。为了更全面地评估现有VSR算法的鲁棒性和性能，我们还收集了一个新数据集，其中包含各种公共视频作为测试集。广泛的评估表明，所提出的方法可以显着提高野生场景中收集的视频的现有VSR方法的性能，同时保持其在现有常用数据集上的性能。该代码可在https://github.com/hyhsimon/boosted-vsr上找到。