语音触发检测是一项重要的任务，它可以在目标用户说关键字短语时激活语音助手。通常对探测器进行语音数据培训，独立于说话者信息，并用于语音触发检测任务。但是，这样的说话者独立语音触发探测器通常会遭受绩效降低，因为代表性不足的群体，例如重音说话者。在这项工作中，我们提出了一个新颖的语音触发探测器，该触发探测器可以使用目标扬声器中的少量话语来提高检测准确性。我们提出的模型采用编码器架构。尽管编码器执行扬声器独立语音触发检测，但类似于传统检测器，解码器预测了每种话语的个性化嵌入。然后，获得个性化的语音触发分数作为在注册话语的嵌入与测试话语之间的相似性得分。个性化的嵌入允许在计算语音触发评分时适应目标扬声器的语音，从而提高语音触发检测精度。实验结果表明，与基线扬声器独立语音触发模型相比，所提出的方法相对降低（FRR）的相对降低38％。
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In this paper, we propose SceNDD: a scenario-based naturalistic driving dataset that is built upon data collected from an instrumented vehicle in downtown Indianapolis. The data collection was completed in 68 driving sessions with different drivers, where each session lasted about 20--40 minutes. The main goal of creating this dataset is to provide the research community with real driving scenarios that have diverse trajectories and driving behaviors. The dataset contains ego-vehicle's waypoints, velocity, yaw angle, as well as non-ego actor's waypoints, velocity, yaw angle, entry-time, and exit-time. Certain flexibility is provided to users so that actors, sensors, lanes, roads, and obstacles can be added to the existing scenarios. We used a Joint Probabilistic Data Association (JPDA) tracker to detect non-ego vehicles on the road. We present some preliminary results of the proposed dataset and a few applications associated with it. The complete dataset is expected to be released by early 2023.
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For low-level computer vision and image processing ML tasks, training on large datasets is critical for generalization. However, the standard practice of relying on real-world images primarily from the Internet comes with image quality, scalability, and privacy issues, especially in commercial contexts. To address this, we have developed a procedural synthetic data generation pipeline and dataset tailored to low-level vision tasks. Our Unreal engine-based synthetic data pipeline populates large scenes algorithmically with a combination of random 3D objects, materials, and geometric transformations. Then, we calibrate the camera noise profiles to synthesize the noisy images. From this pipeline, we generated a fully synthetic image denoising dataset (FSID) which consists of 175,000 noisy/clean image pairs. We then trained and validated a CNN-based denoising model, and demonstrated that the model trained on this synthetic data alone can achieve competitive denoising results when evaluated on real-world noisy images captured with smartphone cameras.
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Diffusion models have emerged as a powerful tool for point cloud generation. A key component that drives the impressive performance for generating high-quality samples from noise is iteratively denoise for thousands of steps. While beneficial, the complexity of learning steps has limited its applications to many 3D real-world. To address this limitation, we propose Point Straight Flow (PSF), a model that exhibits impressive performance using one step. Our idea is based on the reformulation of the standard diffusion model, which optimizes the curvy learning trajectory into a straight path. Further, we develop a distillation strategy to shorten the straight path into one step without a performance loss, enabling applications to 3D real-world with latency constraints. We perform evaluations on multiple 3D tasks and find that our PSF performs comparably to the standard diffusion model, outperforming other efficient 3D point cloud generation methods. On real-world applications such as point cloud completion and training-free text-guided generation in a low-latency setup, PSF performs favorably.
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Linear-quadratic regulators (LQR) are a well known and widely used tool in control theory for both linear and nonlinear dynamics. For nonlinear problems, an LQR-based controller is usually only locally viable, thus, raising the problem of estimating the region of attraction (ROA). The need for good ROA estimations becomes especially pressing for underactuated systems, as a failure of controls might lead to unsafe and unrecoverable system states. Known approaches based on optimization or sampling, while working well, might be too slow in time critical applications and are hard to verify formally. In this work, we propose a novel approach to estimate the ROA based on the analytic solutions to linear ODEs for the torque limited simple pendulum. In simulation and physical experiments, we compared our approach to a Lyapunov-sampling baseline approach and found that our approach was faster to compute, while yielding ROA estimations of similar phase space area.
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Timely and effective response to humanitarian crises requires quick and accurate analysis of large amounts of text data - a process that can highly benefit from expert-assisted NLP systems trained on validated and annotated data in the humanitarian response domain. To enable creation of such NLP systems, we introduce and release HumSet, a novel and rich multilingual dataset of humanitarian response documents annotated by experts in the humanitarian response community. The dataset provides documents in three languages (English, French, Spanish) and covers a variety of humanitarian crises from 2018 to 2021 across the globe. For each document, HUMSET provides selected snippets (entries) as well as assigned classes to each entry annotated using common humanitarian information analysis frameworks. HUMSET also provides novel and challenging entry extraction and multi-label entry classification tasks. In this paper, we take a first step towards approaching these tasks and conduct a set of experiments on Pre-trained Language Models (PLM) to establish strong baselines for future research in this domain. The dataset is available at https://blog.thedeep.io/humset/.
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医疗图像分类是图像识别领域中最关键的问题之一。该领域的主要挑战之一是缺乏标记的培训数据。此外，数据集通常会出现类不平衡，因为某些情况很少发生。结果，分类任务的准确性通常很低。特别是深度学习模型，在图像细分和分类问题上显示出令人鼓舞的结果，但它们需要很大的数据集进行培训。因此，需要从相同分布中生成更多的合成样品。先前的工作表明，特征生成更有效，并且比相应的图像生成更高。我们将此想法应用于医学成像领域。我们使用转移学习来训练针对金标准班级注释的小数据集的细分模型。我们提取了学习的功能，并使用它们使用辅助分类器GAN（ACGAN）来生成在类标签上进行调节的合成特征。我们根据其严重程度测试了下游分类任务中生成特征的质量。实验结果表明，这些生成特征的有效性及其对平衡数据和提高分类类别的准确性的总体贡献的结果有希望的结果。
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在数据驱动的社会的时代，物联网（IoT）设备的无处不在，存储在不同地方的大量数据，分布式学习已获得了很多吸引力，但是，假设具有独立和相同分布的数据（IID）跨设备。在放松这种假设的同时，由于设备的异质性质，无论如何都无法实现现实，但Federated Learnation（FL）已成为一种保护隐私的解决方案，可以训练与大量设备分布的非IID数据进行协作模型。但是，由于不受限制的参与，打算破坏FL模型的恶意设备（攻击者）的出现是不可避免的。在这项工作中，我们旨在确定此类攻击者并减轻对模型的影响，从本质上讲，在双向标签与勾结的翻转攻击的情况下。我们通过利用本地模型之间的相关性来提出两种基于最小生成树和k-densest图的理论算法。即使攻击者最多占所有客户的70％，我们的FL模型也会消除攻击者的影响力，而先前的作品不能负担超过50％的客户作为攻击者。通过在两个基准数据集（即Mnist和Fashion-Mnist）的实验中确定我们算法的有效性，并具有压倒性的攻击者。我们使用准确性，攻击成功率和早期检测回合建立了算法优于现有算法的优势。
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该报告涵盖了我们对Chaplot等人的“使用变压器的可区分空间计划”的复制工作。。在本文中，考虑了以可不同方式进行空间路径计划的问题。他们表明，他们提出的使用空间规划变压器的方法优于先前数据驱动的模型，并利用可不同的结构来学习映射而无需同时地面真相图。我们通过重现其实验并在新数据上测试其方法来验证这些主张。我们还通过地图提高了障碍物复杂性，研究了计划准确性的稳定性。努力调查和验证映射模块的学习的努力是由于缺乏计算资源和无法到达的作者而导致的失败。
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我们介绍RealityTalk，该系统通过语音驱动的互动虚拟元素来增强实时实时演示。增强演示文稿利用嵌入式视觉效果和动画来吸引和表现力。但是，现有的实时演示工具通常缺乏互动性和即兴创作，同时在视频编辑工具中产生这种效果需要大量的时间和专业知识。RealityTalk使用户能够通过实时语音驱动的交互创建实时增强演示文稿。用户可以通过实时语音和支持方式进行交互提示，移动和操纵图形元素。根据我们对177个现有视频编辑的增强演示文稿的分析，我们提出了一套新颖的互动技术，然后将它们纳入真人秀。我们从主持人的角度评估我们的工具，以证明系统的有效性。
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