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Recent development of 3D sensors allows the acquisition of extremely dense 3D point clouds of large-scale scenes. The main challenge of processing such large point clouds remains in the size of the data, which induce expensive computational…

Computer Vision and Pattern Recognition · Computer Science 2021-09-24 Thomas Richard , Florent Dupont , Guillaume Lavoue

Most deep learning methods for video frame interpolation consist of three main components: feature extraction, motion estimation, and image synthesis. Existing approaches are mainly distinguishable in terms of how these modules are…

Computer Vision and Pattern Recognition · Computer Science 2022-11-28 Moritz Nottebaum , Stefan Roth , Simone Schaub-Meyer

In this work we use the persistent homology method, a technique in topological data analysis (TDA), to extract essential topological features from the data space and combine them with deep learning features for classification tasks. In TDA,…

Computer Vision and Pattern Recognition · Computer Science 2023-11-14 Mariana Dória Prata Lima , Gilson Antonio Giraldi , Gastão Florêncio Miranda Junior

This paper discusses the critical decision process of extracting or selecting the features in a supervised learning context. It is often confusing to find a suitable method to reduce dimensionality. There are pros and cons to deciding…

Machine Learning · Computer Science 2022-06-22 Jean-Sébastien Dessureault , Daniel Massicotte

Seam carving is a representative content-aware image retargeting approach to adjust the size of an image while preserving its visually prominent content. To maintain visually important content, seam-carving algorithms first calculate the…

Multimedia · Computer Science 2021-07-20 Seung-Hun Nam , Wonhyuk Ahn , In-Jae Yu , Myung-Joon Kwon , Minseok Son , Heung-Kyu Lee

In this work, we present the Deep Newton Reconstruction Network (DNR-Net), a hybrid data-driven reconstruction technique for emission tomography inspired by Newton's method, a well-known iterative optimization algorithm. The DNR-Net employs…

Image and Video Processing · Electrical Eng. & Systems 2021-10-25 Loizos Koutsantonis , Tiago Carneiro , Emmanuel Kieffer , Frederic Pinel , Pascal Bouvry

Deep learning based methods have recently pushed the state-of-the-art on the problem of Single Image Super-Resolution (SISR). In this work, we revisit the more traditional interpolation-based methods, that were popular before, now with the…

Computer Vision and Pattern Recognition · Computer Science 2017-12-19 Xu Jia , Hong Chang , Tinne Tuytelaars

Monocular depth estimation and image deblurring are two fundamental tasks in computer vision, given their crucial role in understanding 3D scenes. Performing any of them by relying on a single image is an ill-posed problem. The recent…

Computer Vision and Pattern Recognition · Computer Science 2023-07-31 Saqib Nazir , Lorenzo Vaquero , Manuel Mucientes , Víctor M. Brea , Daniela Coltuc

Recently, machine learning based single image super resolution (SR) approaches focus on jointly learning representations for high-resolution (HR) and low-resolution (LR) image patch pairs to improve the quality of the super-resolved images.…

Computer Vision and Pattern Recognition · Computer Science 2016-07-26 Yukai Shi , Keze Wang , Li Xu , Liang Lin

Supervised machine learning pipelines trained on features derived from persistent homology have been experimentally observed to ignore much of the information contained in a persistence diagram. Computing persistence diagrams is often the…

Machine Learning · Statistics 2025-07-11 Nicole Abreu , Parker B. Edwards , Francis Motta

Using a large number of parameters , deep neural networks have achieved remarkable performance on computer vison and natural language processing tasks. However the networks usually suffer from overfitting by using too much parameters.…

Computer Vision and Pattern Recognition · Computer Science 2018-10-24 Zhengsu Chen Jianwei Niu Qi Tian

As datasets used in scientific applications become more complex, studying the geometry and topology of data has become an increasingly prevalent part of the data analysis process. This can be seen for example with the growing interest in…

Algebraic Geometry · Mathematics 2024-03-22 Ezzeddine El Sai , Parker Gara , Markus J. Pflaum

LiDAR odometry is a fundamental task for various areas such as robotics, autonomous driving. This problem is difficult since it requires the systems to be highly robust running in noisy real-world data. Existing methods are mostly local…

Computer Vision and Pattern Recognition · Computer Science 2020-04-10 Zhichao Li , Naiyan Wang

Visual place recognition (VPR) is a fundamental task for many applications such as robot localization and augmented reality. Recently, the hierarchical VPR methods have received considerable attention due to the trade-off between accuracy…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Feng Lu , Shuting Dong , Lijun Zhang , Bingxi Liu , Xiangyuan Lan , Dongmei Jiang , Chun Yuan

We study how to synthesize novel views of human body from a single image. Though recent deep learning based methods work well for rigid objects, they often fail on objects with large articulation, like human bodies. The core step of…

Computer Vision and Pattern Recognition · Computer Science 2018-04-13 Hao Zhu , Hao Su , Peng Wang , Xun Cao , Ruigang Yang

In this paper, we present two pipelines in order to reduce the feature space for anomaly detection using the One Class SVM. As a first stage of both pipelines, we compare the performance of three convolutional autoencoders. We use the PCA…

Computer Vision and Pattern Recognition · Computer Science 2023-05-01 Simon Bilik , Karel Horak

Identifying salient points in images is a crucial component for visual odometry, Structure-from-Motion or SLAM algorithms. Recently, several learned keypoint methods have demonstrated compelling performance on challenging benchmarks.…

Computer Vision and Pattern Recognition · Computer Science 2019-12-24 Jiexiong Tang , Hanme Kim , Vitor Guizilini , Sudeep Pillai , Rares Ambrus

Establishing a sparse set of keypoint correspon dences between images is a fundamental task in many computer vision pipelines. Often, this translates into a computationally expensive nearest neighbor search, where every keypoint descriptor…

Computer Vision and Pattern Recognition · Computer Science 2022-08-11 Emanuele Santellani , Christian Sormann , Mattia Rossi , Andreas Kuhn , Friedrich Fraundorfer

Monocular depth estimation, which plays a crucial role in understanding 3D scene geometry, is an ill-posed problem. Recent methods have gained significant improvement by exploring image-level information and hierarchical features from deep…

Computer Vision and Pattern Recognition · Computer Science 2018-06-08 Huan Fu , Mingming Gong , Chaohui Wang , Kayhan Batmanghelich , Dacheng Tao

In this paper, we propose an iterative framework, which consists of two phases: a generation phase and a training phase, to generate realistic training data and yield a supervised homography network. In the generation phase, given an…

Computer Vision and Pattern Recognition · Computer Science 2023-08-16 Hai Jiang , Haipeng Li , Songchen Han , Haoqiang Fan , Bing Zeng , Shuaicheng Liu