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We present a new approach to 3D object representation where a neural network encodes the geometry of an object directly into the weights and biases of a second 'mapping' network. This mapping network can be used to reconstruct an object by…

Machine Learning · Computer Science 2020-04-07 Eric Mitchell , Selim Engin , Volkan Isler , Daniel D Lee

Given large amount of real photos for training, Convolutional neural network shows excellent performance on object recognition tasks. However, the process of collecting data is so tedious and the background are also limited which makes it…

Computer Vision and Pattern Recognition · Computer Science 2022-05-10 Yida Wang , Weihong Deng

Semantic segmentation of point clouds, aiming to assign each point a semantic category, is critical to 3D scene understanding.Despite of significant advances in recent years, most of existing methods still suffer from either the…

Computer Vision and Pattern Recognition · Computer Science 2023-06-02 Chen Chen , Yisen Wang , Honghua Chen , Xuefeng Yan , Dayong Ren , Yanwen Guo , Haoran Xie , Fu Lee Wang , Mingqiang Wei

Following the advent of NeRFs, 3D Gaussian Splatting (3D-GS) has paved the way to real-time neural rendering overcoming the computational burden of volumetric methods. Following the pioneering work of 3D-GS, several methods have attempted…

Computer Vision and Pattern Recognition · Computer Science 2024-05-01 Evangelos Ververas , Rolandos Alexandros Potamias , Jifei Song , Jiankang Deng , Stefanos Zafeiriou

The goal of this work is to address two limitations in autoencoder-based models: latent space interpretability and compatibility with unstructured meshes. This is accomplished here with the development of a novel graph neural network (GNN)…

Machine Learning · Computer Science 2023-02-20 Shivam Barwey , Varun Shankar , Venkatasubramanian Viswanathan , Romit Maulik

We introduce PartGlot, a neural framework and associated architectures for learning semantic part segmentation of 3D shape geometry, based solely on part referential language. We exploit the fact that linguistic descriptions of a shape can…

Computer Vision and Pattern Recognition · Computer Science 2022-03-31 Juil Koo , Ian Huang , Panos Achlioptas , Leonidas Guibas , Minhyuk Sung

Scene understanding has been of high interest in computer vision. It encompasses not only identifying objects in a scene, but also their relationships within the given context. With this goal, a recent line of works tackles 3D semantic…

Computer Vision and Pattern Recognition · Computer Science 2020-04-09 Johanna Wald , Helisa Dhamo , Nassir Navab , Federico Tombari

Point cloud is one of the widely used techniques for representing and storing 3D geometric data. In the past several methods have been proposed for processing point clouds. Methods such as PointNet and FoldingNet have shown promising…

Computer Vision and Pattern Recognition · Computer Science 2022-09-29 Prajwal Singh , Kaustubh Sadekar , Shanmuganathan Raman

Geometrical structures and the internal local region relationship, such as symmetry, regular array, junction, etc., are essential for understanding a 3D shape. This paper proposes a point cloud feature extraction network named PointSCNet,…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Xingye Chen , Yiqi Wu , Wenjie Xu , Jin Li , Huaiyi Dong , Yilin Chen

Deep generative networks have been widely used for learning mappings from a low-dimensional latent space to a high-dimensional data space. In many cases, data transformations are defined by linear paths in this latent space. However, the…

Machine Learning · Statistics 2019-12-06 Marissa Connor , Christopher Rozell

This paper introduces a novel hierarchical autoencoder that maps 3D models into a highly compressed latent space. The hierarchical autoencoder is specifically designed to tackle the challenges arising from large-scale datasets and…

Computer Vision and Pattern Recognition · Computer Science 2024-10-03 Biao Zhang , Peter Wonka

We use spatially-sparse two, three and four dimensional convolutional autoencoder networks to model sparse structures in 2D space, 3D space, and 3+1=4 dimensional space-time. We evaluate the resulting latent spaces by testing their…

Computer Vision and Pattern Recognition · Computer Science 2018-11-27 Benjamin Graham

We study the problem of 3D object generation. We propose a novel framework, namely 3D Generative Adversarial Network (3D-GAN), which generates 3D objects from a probabilistic space by leveraging recent advances in volumetric convolutional…

Computer Vision and Pattern Recognition · Computer Science 2017-01-05 Jiajun Wu , Chengkai Zhang , Tianfan Xue , William T. Freeman , Joshua B. Tenenbaum

Generative models have shown great promise in synthesizing photorealistic 3D objects, but they require large amounts of training data. We introduce SinGRAF, a 3D-aware generative model that is trained with a few input images of a single…

Computer Vision and Pattern Recognition · Computer Science 2023-04-04 Minjung Son , Jeong Joon Park , Leonidas Guibas , Gordon Wetzstein

3D shape is a crucial but heavily underutilized cue in today's computer vision systems, mostly due to the lack of a good generic shape representation. With the recent availability of inexpensive 2.5D depth sensors (e.g. Microsoft Kinect),…

Computer Vision and Pattern Recognition · Computer Science 2015-04-16 Zhirong Wu , Shuran Song , Aditya Khosla , Fisher Yu , Linguang Zhang , Xiaoou Tang , Jianxiong Xiao

Recent advances in the field of generative models and in particular generative adversarial networks (GANs) have lead to substantial progress for controlled image editing, especially compared with the pre-deep learning era. Despite their…

Computer Vision and Pattern Recognition · Computer Science 2023-12-14 Gwilherm Lesné , Yann Gousseau , Saïd Ladjal , Alasdair Newson

Deep generative models of 3D shapes have received a great deal of research interest. Yet, almost all of them generate discrete shape representations, such as voxels, point clouds, and polygon meshes. We present the first 3D generative model…

Computer Vision and Pattern Recognition · Computer Science 2021-08-17 Rundi Wu , Chang Xiao , Changxi Zheng

Rapid growth of high-dimensional datasets in fields such as single-cell RNA sequencing and spatial genomics has led to unprecedented opportunities for scientific discovery, but it also presents unique computational and statistical…

We aim to obtain an interpretable, expressive, and disentangled scene representation that contains comprehensive structural and textural information for each object. Previous scene representations learned by neural networks are often…

Computer Vision and Pattern Recognition · Computer Science 2018-12-19 Shunyu Yao , Tzu Ming Harry Hsu , Jun-Yan Zhu , Jiajun Wu , Antonio Torralba , William T. Freeman , Joshua B. Tenenbaum

Directly learning features from the point cloud has become an active research direction in 3D understanding. Existing learning-based methods usually construct local regions from the point cloud and extract the corresponding features.…

Computer Vision and Pattern Recognition · Computer Science 2019-06-21 Lin-Zhuo Chen , Xuan-Yi Li , Deng-Ping Fan , Kai Wang , Shao-Ping Lu , Ming-Ming Cheng
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