我们提出了PIXTRACK,这是一种基于视觉的对象姿势跟踪框架,并使用新型视图合成和深度特征 - 金属对齐。我们的评估表明,我们的方法产生了RGB图像中对象的高度准确,健壮和无抖动的6DOF姿势估计,而无需任何数据注释或轨迹平滑。我们的方法还在计算上有效,可以轻松进行多对象跟踪,而不会改变我们的方法,而只是使用CPU多处理。
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在本文中,我们提出了一种视觉定位管道,即MEGLOC,在不同的场景下,包括室内和室外场景,包括室内和户外场景,每天不同的时间,跨越多年的不同时间,甚至是跨越多年的。Megloc实现了最先进的数据集,包括在不断变化的条件下赢得ICCV 2021研讨会的户外和室内视觉本地化挑战,以及自主的重新定位挑战驾驶ICCV 2021研讨会关于基于地图的自主驾驶定位。
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我们介绍了日常桌面对象的998 3D型号的数据集及其847,000个现实世界RGB和深度图像。每个图像的相机姿势和对象姿势的准确注释都以半自动化方式执行,以促进将数据集用于多种3D应用程序,例如形状重建,对象姿势估计,形状检索等。3D重建由于缺乏适当的现实世界基准来完成该任务,并证明我们的数据集可以填补该空白。整个注释数据集以及注释工具和评估基线的源代码可在http://www.ocrtoc.org/3d-reconstruction.html上获得。
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神经辐射场(NERF)在代表具有高分辨率细节和有效记忆的复杂3D场景方面取得了巨大成功。然而,当前基于NERF的姿势估计量没有初始姿势预测,并且在优化过程中易于局部优势。在本文中,我们介绍了纬度:全球定位,具有截短的动态低通滤波器,该过滤器引入了城市规模的NERF中的两阶段定位机制。在识别阶段,我们通过训练有素的NERFS生成的图像来训练回归器,该图像为全球本地化提供了初始值。在姿势优化阶段,我们通过直接优化切线平面上的姿势来最大程度地减少观察到的图像之间的残差和渲染图像。为了避免收敛到局部最优,我们引入了一个截短的动态低通滤波器(TDLF),以进行粗到细小的姿势注册。我们在合成和现实世界中评估了我们的方法,并显示了其在大规模城市场景中高精度导航的潜在应用。代码和数据将在https://github.com/jike5/latitude上公开获取。
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Estimating 6D poses of objects from images is an important problem in various applications such as robot manipulation and virtual reality. While direct regression of images to object poses has limited accuracy, matching rendered images of an object against the input image can produce accurate results. In this work, we propose a novel deep neural network for 6D pose matching named DeepIM. Given an initial pose estimation, our network is able to iteratively refine the pose by matching the rendered image against the observed image. The network is trained to predict a relative pose transformation using a disentangled representation of 3D location and 3D orientation and an iterative training process. Experiments on two commonly used benchmarks for 6D pose estimation demonstrate that DeepIM achieves large improvements over stateof-the-art methods. We furthermore show that DeepIM is able to match previously unseen objects.
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大多数最先进的定位算法都依赖于稳健的相对姿势估计和几何验证来获得移动的对象不可知的摄像机在复杂的室内环境中姿势。但是,如果场景包含重复的结构,例如书桌,桌子,盒子或移动的人,则这种方法容易犯错。我们表明,可移动对象包含了不可忽略的本地化误差,并提出了一种新的直接方法,以预测六度自由(6DOF)更加坚固。我们为定位管道INLOC配备了实例分割网络yolact ++。动态对象的口罩用于相对姿势估计步骤和摄像头姿势建议的最终分类中。首先,我们过滤出放置在动态对象的掩模上的匹配。其次,我们跳过了与移动对象相关的区域上查询和合成图像的比较。此过程导致更强大的本地化。最后,我们描述并改善了由合成图像和查询图像之间的基于梯度的比较引起的错误,并发布了新的管道,以模拟MatterPort扫描中具有可移动对象的环境。所有代码均可在github.com/dubenma/d-inlocpp上获得。
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我们提出了LOC-NERF,这是一种基于实时视觉的机器人定位方法,结合了蒙特卡洛定位和神经辐射场(NERF)。我们的系统使用预先训练的NERF模型作为环境的地图,可以使用RGB摄像机作为机器人唯一的外部感受传感器实时定位。尽管神经辐射场在计算机视觉和图形中看到了重要的视觉渲染应用,但他们发现机器人技术的用途有限。现有的基于NERF的本地化方法需要良好的初始姿势猜测和重大的计算,这使得它们对于实时机器人技术应用不切实际。通过使用Monte Carlo定位作为使用NERF MAP模型估算姿势的主力,LOC-NERF能够比ART的状态更快地执行本地化,并且不依赖初始姿势估计。除了测试合成数据外,我们还使用ClearPath Jackal UGV收集的实际数据运行系统,并首次证明了使用神经光辉场进行实时全球定位的能力。我们在https://github.com/mit-spark/loc-nerf上公开代码。
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我们提出了一种便携式多型摄像头系统,该系统具有专用模型,用于动态场景中的新型视图和时间综合。我们的目标是使用我们的便携式多座相机从任何角度从任何角度出发为动态场景提供高质量的图像。为了实现这种新颖的观点和时间综合,我们开发了一个配备了五个相机的物理多型摄像头,以在时间和空间域中训练神经辐射场(NERF),以进行动态场景。我们的模型将6D坐标(3D空间位置,1D时间坐标和2D观看方向)映射到观看依赖性且随时间变化的发射辐射和体积密度。量渲染用于在指定的相机姿势和时间上渲染光真实的图像。为了提高物理相机的鲁棒性,我们提出了一个摄像机参数优化模块和一个时间框架插值模块,以促进跨时间的信息传播。我们对现实世界和合成数据集进行了实验以评估我们的系统,结果表明,我们的方法在定性和定量上优于替代解决方案。我们的代码和数据集可从https://yuenfuilau.github.io获得。
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While object reconstruction has made great strides in recent years, current methods typically require densely captured images and/or known camera poses, and generalize poorly to novel object categories. To step toward object reconstruction in the wild, this work explores reconstructing general real-world objects from a few images without known camera poses or object categories. The crux of our work is solving two fundamental 3D vision problems -- shape reconstruction and pose estimation -- in a unified approach. Our approach captures the synergies of these two problems: reliable camera pose estimation gives rise to accurate shape reconstruction, and the accurate reconstruction, in turn, induces robust correspondence between different views and facilitates pose estimation. Our method FORGE predicts 3D features from each view and leverages them in conjunction with the input images to establish cross-view correspondence for estimating relative camera poses. The 3D features are then transformed by the estimated poses into a shared space and are fused into a neural radiance field. The reconstruction results are rendered by volume rendering techniques, enabling us to train the model without 3D shape ground-truth. Our experiments show that FORGE reliably reconstructs objects from five views. Our pose estimation method outperforms existing ones by a large margin. The reconstruction results under predicted poses are comparable to the ones using ground-truth poses. The performance on novel testing categories matches the results on categories seen during training. Project page: https://ut-austin-rpl.github.io/FORGE/
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6D object pose estimation problem has been extensively studied in the field of Computer Vision and Robotics. It has wide range of applications such as robot manipulation, augmented reality, and 3D scene understanding. With the advent of Deep Learning, many breakthroughs have been made; however, approaches continue to struggle when they encounter unseen instances, new categories, or real-world challenges such as cluttered backgrounds and occlusions. In this study, we will explore the available methods based on input modality, problem formulation, and whether it is a category-level or instance-level approach. As a part of our discussion, we will focus on how 6D object pose estimation can be used for understanding 3D scenes.
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我们提出了一个基于按键的对象级别的SLAM框架,该框架可以为对称和不对称对象提供全球一致的6DOF姿势估计。据我们所知,我们的系统是最早利用来自SLAM的相机姿势信息的系统之一,以提供先验知识,以跟踪对称对象的关键点 - 确保新测量与当前的3D场景一致。此外,我们的语义关键点网络经过训练,可以预测捕获预测的真实错误的关键点的高斯协方差,因此不仅可以作为系统优化问题中残留物的权重,而且还可以作为检测手段有害的统计异常值,而无需选择手动阈值。实验表明,我们的方法以6DOF对象姿势估算和实时速度为最先进的状态提供了竞争性能。我们的代码,预培训模型和关键点标签可用https://github.com/rpng/suo_slam。
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Estimating the 6D pose of known objects is important for robots to interact with the real world. The problem is challenging due to the variety of objects as well as the complexity of a scene caused by clutter and occlusions between objects. In this work, we introduce PoseCNN, a new Convolutional Neural Network for 6D object pose estimation. PoseCNN estimates the 3D translation of an object by localizing its center in the image and predicting its distance from the camera. The 3D rotation of the object is estimated by regressing to a quaternion representation. We also introduce a novel loss function that enables PoseCNN to handle symmetric objects. In addition, we contribute a large scale video dataset for 6D object pose estimation named the YCB-Video dataset. Our dataset provides accurate 6D poses of 21 objects from the YCB dataset observed in 92 videos with 133,827 frames. We conduct extensive experiments on our YCB-Video dataset and the OccludedLINEMOD dataset to show that PoseCNN is highly robust to occlusions, can handle symmetric objects, and provide accurate pose estimation using only color images as input. When using depth data to further refine the poses, our approach achieves state-of-the-art results on the challenging OccludedLINEMOD dataset. Our code and dataset are available at https://rse-lab.cs.washington.edu/projects/posecnn/.
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我们引入了一个相机重新定位管道,该管道结合了绝对姿势回归(APR)和直接功能匹配。通过结合曝光自适应的新视图综合,我们的方法成功地解决了现有基于光度法方法无法处理的室外环境中的光度扭曲。借助域不变的功能匹配,我们的解决方案通过对未标记数据的半监督学习提高了姿势回归精度。特别是,该管道由两个组成部分组成:新型视图合成器和DFNET。前者综合了新的视图,以补偿暴露的变化,后者会回归摄像头的姿势,并提取了可靠的功能,这些特征弥补了真实图像和合成图像之间的域间隙。此外,我们引入了在线合成数据生成方案。我们表明,这些方法有效地增强了室内和室外场景中的相机姿势估计。因此,我们的方法通过优于现有的单位图APR方法高达56%,可与基于3D结构的方法相当。
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在3D视觉中,视觉重新定位已被广泛讨论:鉴于预构建的3D视觉图,估计查询图像的6 DOF(自由度)姿势。大规模室内环境中的重新定位可实现有吸引力的应用程序,例如增强现实和机器人导航。但是,当相机移动时,在这种环境中,外观变化很快,这对于重新定位系统来说是具有挑战性的。为了解决这个问题,我们建议一种基于虚拟视图综合方法Rendernet,以丰富有关此特定情况的数据库和完善姿势。我们选择直接渲染虚拟观点的必要全局和本地特征,而不是渲染需要高质量3D模型的真实图像,并分别将它们应用于后续图像检索和功能匹配操作中。所提出的方法在很大程度上可以改善大规模室内环境中的性能,例如,在INLOC数据集中获得7.1 \%和12.2 \%的改善。
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Camera pose estimation is a key step in standard 3D reconstruction pipelines that operate on a dense set of images of a single object or scene. However, methods for pose estimation often fail when only a few images are available because they rely on the ability to robustly identify and match visual features between image pairs. While these methods can work robustly with dense camera views, capturing a large set of images can be time-consuming or impractical. We propose SparsePose for recovering accurate camera poses given a sparse set of wide-baseline images (fewer than 10). The method learns to regress initial camera poses and then iteratively refine them after training on a large-scale dataset of objects (Co3D: Common Objects in 3D). SparsePose significantly outperforms conventional and learning-based baselines in recovering accurate camera rotations and translations. We also demonstrate our pipeline for high-fidelity 3D reconstruction using only 5-9 images of an object.
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我们提出了一种称为DPODV2(密集姿势对象检测器)的三个阶段6 DOF对象检测方法,该方法依赖于致密的对应关系。我们将2D对象检测器与密集的对应关系网络和多视图姿势细化方法相结合,以估计完整的6 DOF姿势。与通常仅限于单眼RGB图像的其他深度学习方法不同,我们提出了一个统一的深度学习网络,允许使用不同的成像方式(RGB或DEPTH)。此外,我们提出了一种基于可区分渲染的新型姿势改进方法。主要概念是在多个视图中比较预测并渲染对应关系,以获得与所有视图中预测的对应关系一致的姿势。我们提出的方法对受控设置中的不同数据方式和培训数据类型进行了严格的评估。主要结论是,RGB在对应性估计中表现出色,而如果有良好的3D-3D对应关系,则深度有助于姿势精度。自然,他们的组合可以实现总体最佳性能。我们进行广泛的评估和消融研究,以分析和验证几个具有挑战性的数据集的结果。 DPODV2在所有这些方面都取得了出色的成果,同时仍然保持快速和可扩展性,独立于使用的数据模式和培训数据的类型
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铰接式3D形状重建的事先工作通常依赖于专用传感器(例如,同步的多摄像机系统)或预先构建的3D可变形模型(例如,Smal或SMPL)。这些方法无法在野外扩展到不同的各种物体。我们呈现Banmo,这是一种需要专用传感器的方法,也不需要预定义的模板形状。 Banmo在可怜的渲染框架中从许多单眼休闲视频中建立高保真,铰接式的3D模型(包括形状和动画皮肤的重量)。虽然许多视频的使用提供了更多的相机视图和对象关节的覆盖范围,但它们在建立不同背景,照明条件等方面建立了重大挑战。我们的主要洞察力是合并三所思想学校; (1)使用铰接骨骼和混合皮肤的经典可变形形状模型,(2)可容纳基于梯度的优化,(3)在像素之间产生对应关系的规范嵌入物模型。我们介绍了神经混合皮肤模型,可允许可微分和可逆的铰接变形。与规范嵌入式结合时,这些模型允许我们在跨越可通过循环一致性自我监督的视频中建立密集的对应。在真实和合成的数据集上,Banmo显示比人类和动物的先前工作更高保真3D重建,具有从新颖的观点和姿势的现实图像。项目网页:Banmo-www.github.io。
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This paper presents an approach that reconstructs a hand-held object from a monocular video. In contrast to many recent methods that directly predict object geometry by a trained network, the proposed approach does not require any learned prior about the object and is able to recover more accurate and detailed object geometry. The key idea is that the hand motion naturally provides multiple views of the object and the motion can be reliably estimated by a hand pose tracker. Then, the object geometry can be recovered by solving a multi-view reconstruction problem. We devise an implicit neural representation-based method to solve the reconstruction problem and address the issues of imprecise hand pose estimation, relative hand-object motion, and insufficient geometry optimization for small objects. We also provide a newly collected dataset with 3D ground truth to validate the proposed approach.
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We present a novel method for detecting 3D model instances and estimating their 6D poses from RGB data in a single shot. To this end, we extend the popular SSD paradigm to cover the full 6D pose space and train on synthetic model data only. Our approach competes or surpasses current state-of-the-art methods that leverage RGB-D data on multiple challenging datasets. Furthermore, our method produces these results at around 10Hz, which is many times faster than the related methods. For the sake of reproducibility, we make our trained networks and detection code publicly available. 1
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对人类的逼真渲染和安息对于实现增强现实体验至关重要。我们提出了一个新颖的框架,以重建人类和场景,可以用新颖的人类姿势和景色从一个单一的野外视频中呈现。给定一个由移动摄像机捕获的视频,我们训练了两个NERF模型:人类NERF模型和一个场景NERF模型。为了训练这些模型,我们依靠现有方法来估计人类和场景的粗糙几何形状。这些粗糙的几何估计值使我们能够创建一个从观察空间到独立姿势独立的空间的翘曲场10秒的视频剪辑,并以新颖的观点以及背景提供新颖的姿势,提供人类的高质量效果。
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