We present a neural technique for learning to select a local sub-region around a point which can be used for mesh parameterization. The motivation for our framework is driven by interactive workflows used for decaling, texturing, or painting on surfaces. Our key idea is to incorporate segmentation probabilities as weights of a classical parameterization method, implemented as a novel differentiable parameterization layer within a neural network framework. We train a segmentation network to select 3D regions that are parameterized into 2D and penalized by the resulting distortion, giving rise to segmentations which are distortion-aware. Following training, a user can use our system to interactively select a point on the mesh and obtain a large, meaningful region around the selection which induces a low-distortion parameterization. Our code and project page are currently available.
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2022-11-24
The 1$^{\text{st}}$ Workshop on Maritime Computer Vision (MaCVi) 2023 focused on maritime computer vision for Unmanned Aerial Vehicles (UAV) and Unmanned Surface Vehicle (USV), and organized several subchallenges in this domain: (i) UAV-based Maritime Object Detection, (ii) UAV-based Maritime Object Tracking, (iii) USV-based Maritime Obstacle Segmentation and (iv) USV-based Maritime Obstacle Detection. The subchallenges were based on the SeaDronesSee and MODS benchmarks. This report summarizes the main findings of the individual subchallenges and introduces a new benchmark, called SeaDronesSee Object Detection v2, which extends the previous benchmark by including more classes and footage. We provide statistical and qualitative analyses, and assess trends in the best-performing methodologies of over 130 submissions. The methods are summarized in the appendix. The datasets, evaluation code and the leaderboard are publicly available at https://seadronessee.cs.uni-tuebingen.de/macvi.
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本文介绍了一种数据驱动的形状完成方法，该方法着重于完成3D形状缺失区域的几何细节。我们观察到，现有的生成方法缺乏训练数据和表示能力，可以通过复杂的几何形状和拓扑合成合理的，细粒度的细节。我们的关键见解是从部分输入复制和变形补丁以完成缺失区域。这使我们能够保留本地几何特征的风格，即使它与培训数据有很大不同。我们的全自动方法分为两个阶段。首先，我们学会从输入形状检索候选补丁。其次，我们选择并变形了一些检索到的候选者，以无缝将它们融合到完整的形状中。该方法结合了两种最常见的完成方法的优点：基于相似性的单稳定性完成，以及通过学习形状空间来完成。我们通过从部分输入中检索贴片来利用重复模式，并通过使用神经网络来指导检索和变形步骤来学习全球结构先验。实验结果表明，我们的方法在多个数据集和形状类别上的表现非常优于基线。代码和数据可在https://github.com/gitbosun/patchrd上找到。
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本文介绍了学习3D表面类似地图集的表示的新技术，即从2D域到表面的同质形态转换。与先前的工作相比，我们提出了两项主要贡献。首先，我们没有通过优化作为高斯人的混合物来了解具有任意拓扑的连续2D域，而不是将固定的2D域（例如一组平方斑）映射到表面上。其次，我们在两个方向上学习一致的映射：图表，从3D表面到2D域，以及参数化，它们的倒数。我们证明，这可以提高学到的表面表示的质量，并在相关形状集合中的一致性。因此，它导致了应用程序的改进，例如对应估计，纹理传输和一致的UV映射。作为额外的技术贡献，我们概述了，尽管合并正常的一致性具有明显的好处，但它会导致优化问题，并且可以使用简单的排斥正则化来缓解这些问题。我们证明我们的贡献比现有基线提供了更好的表面表示。
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我们通过执行基于接触的推理，提供了一种形状部分插槽机，一种用于组装来自现有部件的新型3D形状。我们的方法表示每个形状作为“槽”的图形，其中每个槽是两个形状部件之间的接触区域。基于此表示，我们设计了一种基于图形 - 神经网络的模型，用于生成新的插槽图和检索兼容部分，以及基于梯度 - 下降的优化方案，用于将检索到的部分组装成尊重所生成的完整形状插槽图。这种方法不需要任何语义部分标签;有趣的是，它还不需要完整的部分几何形状 - 推理零件连接的区域足以产生新颖的，高质量的3D形状。我们展示了我们的方法在质量，多样性和结构复杂性方面产生了优于现有的逐个拟合方法的形状。
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Superhuman神经网络代理如alphazero是什么？这个问题是科学和实际的兴趣。如果强神经网络的陈述与人类概念没有相似之处，我们理解他们的决定的忠实解释的能力将受到限制，最终限制了我们可以通过神经网络解释来实现的。在这项工作中，我们提供了证据表明，人类知识是由alphapero神经网络获得的，因为它在国际象棋游戏中列车。通过探究广泛的人类象棋概念，我们在alphazero网络中显示了这些概念的时间和地点。我们还提供了一种关注开放游戏的行为分析，包括来自国际象棋Grandmaster Vladimir Kramnik的定性分析。最后，我们开展了初步调查，观察alphazero的表现的低级细节，并在线提供由此产生的行为和代表性分析。
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我们提出了一种从一系列时间演化点云序列中对时间一致的表面序列的无监督重建的方法。它在帧之间产生了密集和语义有意义的对应关系。我们将重建的表面代表由神经网络计算的Atlases，这使我们能够在帧之间建立对应关系。使这些对应关系的关键是语义上有意义的是为了保证在相应点计算的度量张量和尽可能相似。我们设计了一种优化策略，使我们的方法能够强大地对噪声和全局动作，而无需先验的对应关系或预先对准步骤。结果，我们的方法在几个具有挑战性的数据集中占据了最先进的。该代码可在https://github.com/bednarikjan/temporally_coherent_surface_reconstruction附近获得。
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How can we accurately identify new memory workloads while classifying known memory workloads? Verifying DRAM (Dynamic Random Access Memory) using various workloads is an important task to guarantee the quality of DRAM. A crucial component in the process is open-set recognition which aims to detect new workloads not seen in the training phase. Despite its importance, however, existing open-set recognition methods are unsatisfactory in terms of accuracy since they fail to exploit the characteristics of workload sequences. In this paper, we propose Acorn, an accurate open-set recognition method capturing the characteristics of workload sequences. Acorn extracts two types of feature vectors to capture sequential patterns and spatial locality patterns in memory access. Acorn then uses the feature vectors to accurately classify a subsequence into one of the known classes or identify it as the unknown class. Experiments show that Acorn achieves state-of-the-art accuracy, giving up to 37% points higher unknown class detection accuracy while achieving comparable known class classification accuracy than existing methods.
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FSS(Few-shot segmentation)~aims to segment a target class with a small number of labeled images (support Set). To extract information relevant to target class, a dominant approach in best performing FSS baselines removes background features using support mask. We observe that this support mask presents an information bottleneck in several challenging FSS cases e.g., for small targets and/or inaccurate target boundaries. To this end, we present a novel method (MSI), which maximizes the support-set information by exploiting two complementary source of features in generating super correlation maps. We validate the effectiveness of our approach by instantiating it into three recent and strong FSS baselines. Experimental results on several publicly available FSS benchmarks show that our proposed method consistently improves the performance by visible margins and allows faster convergence. Our codes and models will be publicly released.
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Weakly-supervised object detection (WSOD) models attempt to leverage image-level annotations in lieu of accurate but costly-to-obtain object localization labels. This oftentimes leads to substandard object detection and localization at inference time. To tackle this issue, we propose D2DF2WOD, a Dual-Domain Fully-to-Weakly Supervised Object Detection framework that leverages synthetic data, annotated with precise object localization, to supplement a natural image target domain, where only image-level labels are available. In its warm-up domain adaptation stage, the model learns a fully-supervised object detector (FSOD) to improve the precision of the object proposals in the target domain, and at the same time learns target-domain-specific and detection-aware proposal features. In its main WSOD stage, a WSOD model is specifically tuned to the target domain. The feature extractor and the object proposal generator of the WSOD model are built upon the fine-tuned FSOD model. We test D2DF2WOD on five dual-domain image benchmarks. The results show that our method results in consistently improved object detection and localization compared with state-of-the-art methods.
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