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An explainable machine learning method for point cloud classification, called the PointHop method, is proposed in this work. The PointHop method consists of two stages: 1) local-to-global attribute building through iterative one-hop…

Computer Vision and Pattern Recognition · Computer Science 2020-05-26 Min Zhang , Haoxuan You , Pranav Kadam , Shan Liu , C. -C. Jay Kuo

Classical work on line segment detection is knowledge-based; it uses carefully designed geometric priors using either image gradients, pixel groupings, or Hough transform variants. Instead, current deep learning methods do away with all…

Computer Vision and Pattern Recognition · Computer Science 2020-07-21 Yancong Lin , Silvia L. Pintea , Jan C. van Gemert

Image recognition is the need of the hour. In order to be able to recognize an image, it is of immense importance that the image should be distinguishable from the background. In the present work, an approach is presented for automatic…

Computer Vision and Pattern Recognition · Computer Science 2016-04-08 Vivek Kumar , Sumit Pandey , Amrindra Pal , Sandeep Sharma

Object detection algorithms for Lidar data have seen numerous publications in recent years, reporting good results on dataset benchmarks oriented towards automotive requirements. Nevertheless, many of these are not deployable to embedded…

Computer Vision and Pattern Recognition · Computer Science 2021-01-05 Lukas Hahn , Frederik Hasecke , Anton Kummert

We present a 3D object detection method that uses regressed descriptors of locally-sampled RGB-D patches for 6D vote casting. For regression, we employ a convolutional auto-encoder that has been trained on a large collection of random local…

Computer Vision and Pattern Recognition · Computer Science 2016-07-21 Wadim Kehl , Fausto Milletari , Federico Tombari , Slobodan Ilic , Nassir Navab

New efficient source feature compression solutions are proposed based on a two-stage Walsh-Hadamard Transform (WHT) for Convolutional Neural Network (CNN)-based object classification in underwater robotics. The object images are firstly…

Computer Vision and Pattern Recognition · Computer Science 2021-12-30 Xueyuan Zhao , Mehdi Rahmati , Dario Pompili

The annotation of 3D datasets is required for semantic-segmentation and object detection in scene understanding. In this paper we present a framework for the weakly supervision of a point clouds transformer that is used for 3D object…

Computer Vision and Pattern Recognition · Computer Science 2024-01-22 Zuojin Tang , Bo Sun , Tongwei Ma , Daosheng Li , Zhenhui Xu

We describe a method to parse a complex, cluttered indoor scene into primitives which offer a parsimonious abstraction of scene structure. Our primitives are simple convexes. Our method uses a learned regression procedure to parse a scene…

Computer Vision and Pattern Recognition · Computer Science 2023-08-17 Vaibhav Vavilala , David Forsyth

This paper proposes BPNet, a novel end-to-end deep learning framework to learn B\'ezier primitive segmentation on 3D point clouds. The existing works treat different primitive types separately, thus limiting them to finite shape categories.…

Computer Vision and Pattern Recognition · Computer Science 2025-04-24 Rao Fu , Cheng Wen , Qian Li , Xiao Xiao , Pierre Alliez

The Hough transform (HT) is a fundamental tool across various domains, from classical image analysis to neural networks and tomography. Two key aspects of the algorithms for computing the HT are their computational complexity and accuracy -…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Danil Kazimirov , Dmitry Nikolaev

Recent camera-based 3D object detection methods have introduced sequential frames to improve the detection performance hoping that multiple frames would mitigate the large depth estimation error. Despite improved detection performance,…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Sanmin Kim , Youngseok Kim , In-Jae Lee , Dongsuk Kum

We propose an effective unsupervised 3D point cloud novelty detection approach, leveraging a general point cloud feature extractor and a one-class classifier. The general feature extractor consists of a graph-based autoencoder and is…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Shizuka Akahori , Satoshi Iizuka , Ken Mawatari , Kazuhiro Fukui

State-of-the-art detection systems are generally evaluated on their ability to exhaustively retrieve objects densely distributed in the image, across a wide variety of appearances and semantic categories. Orthogonal to this, many real-life…

Computer Vision and Pattern Recognition · Computer Science 2020-04-28 Amelie Royer , Christoph H. Lampert

We present a novel approach to the detection and 3D pose estimation of objects in color images. Its main contribution is that it does not require any training phases nor data for new objects, while state-of-the-art methods typically require…

Computer Vision and Pattern Recognition · Computer Science 2019-09-02 Giorgia Pitteri , Slobodan Ilic , Vincent Lepetit

Rotation estimation of known rigid objects is important for robotic applications such as dexterous manipulation. Most existing methods for rotation estimation use intermediate representations such as templates, global or local feature…

Computer Vision and Pattern Recognition · Computer Science 2018-12-04 Ge Gao , Mikko Lauri , Jianwei Zhang , Simone Frintrop

Region extraction is necessary in a wide range of applications, from object detection in autonomous driving to analysis of subcellular morphology in cell biology. There exist two main approaches: convex hull extraction, for which exact and…

Computational Geometry · Computer Science 2022-06-24 Kevin Christopher VanHorn , Murat Can Çobanoğlu

We present SuperDec, an approach for creating compact 3D scene representations via decomposition into superquadric primitives. While most recent works leverage geometric primitives to obtain photorealistic 3D scene representations, we…

Computer Vision and Pattern Recognition · Computer Science 2026-03-20 Elisabetta Fedele , Boyang Sun , Leonidas Guibas , Marc Pollefeys , Francis Engelmann

We address the problem of real-time 3D object detection from point clouds in the context of autonomous driving. Computation speed is critical as detection is a necessary component for safety. Existing approaches are, however, expensive in…

Computer Vision and Pattern Recognition · Computer Science 2019-03-05 Bin Yang , Wenjie Luo , Raquel Urtasun

A crucial step in the analysis of persistent homology is the transformation of data into an appropriate topological object (in our case, a simplicial complex). Modern packages for persistent homology often construct Vietoris--Rips or other…

Computational Geometry · Computer Science 2019-09-18 Michelle Feng , Mason A. Porter

Capturing and rendering life-like hair is particularly challenging due to its fine geometric structure, the complex physical interaction and its non-trivial visual appearance.Yet, hair is a critical component for believable avatars. In this…

Computer Vision and Pattern Recognition · Computer Science 2021-12-21 Ziyan Wang , Giljoo Nam , Tuur Stuyck , Stephen Lombardi , Michael Zollhoefer , Jessica Hodgins , Christoph Lassner