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Pseudospectra and structured pseudospectra are important tools for the analysis of matrices. Their computation, however, can be very demanding for all but small matrices. A new approach to compute approximations of pseudospectra and…

数值分析 · 数学 2016-11-16 Silvia Noschese , Lothar Reichel

Autoencoding, which aims to reconstruct the input images through a bottleneck latent representation, is one of the classic feature representation learning strategies. It has been shown effective as an auxiliary task for semi-supervised…

计算机视觉与模式识别 · 计算机科学 2023-03-20 Yuhao Lin , Haiming Xu , Lingqiao Liu , Jinan Zou , Javen Qinfeng Shi

Recent object detection systems rely on two critical steps: (1) a set of object proposals is predicted as efficiently as possible, and (2) this set of candidate proposals is then passed to an object classifier. Such approaches have been…

计算机视觉与模式识别 · 计算机科学 2015-09-02 Pedro O. Pinheiro , Ronan Collobert , Piotr Dollar

Learning automatically the structure of object categories remains an important open problem in computer vision. In this paper, we propose a novel unsupervised approach that can discover and learn landmarks in object categories, thus…

计算机视觉与模式识别 · 计算机科学 2017-08-08 James Thewlis , Hakan Bilen , Andrea Vedaldi

Convolutional Neural Networks (CNNs) can provide accurate object classification. They can be extended to perform object detection by iterating over dense or selected proposed object regions. However, the runtime of such detectors scales as…

计算机视觉与模式识别 · 计算机科学 2014-04-08 Forrest Iandola , Matt Moskewicz , Sergey Karayev , Ross Girshick , Trevor Darrell , Kurt Keutzer

Contour polygonal approximation is a simplified representation of a contour by line segments, so that the main characteristics of the contour remain in a small number of line segments. This paper presents a novel method for polygonal…

计算物理 · 物理学 2013-11-19 André Ricardo Backes , Dalcimar Casanova , Odemir Martinez Bruno

We introduce a "learning-based" algorithm for the low-rank decomposition problem: given an $n \times d$ matrix $A$, and a parameter $k$, compute a rank-$k$ matrix $A'$ that minimizes the approximation loss $\|A-A'\|_F$. The algorithm uses a…

机器学习 · 计算机科学 2019-10-31 Piotr Indyk , Ali Vakilian , Yang Yuan

Context modeling is one of the most fertile subfields of visual recognition which aims at designing discriminant image representations while incorporating their intrinsic and extrinsic relationships. However, the potential of context…

计算机视觉与模式识别 · 计算机科学 2020-12-22 Mingyuan Jiu , Hichem Sahbi

Standard losses for training deep segmentation networks could be seen as individual classifications of pixels, instead of supervising the global shape of the predicted segmentations. While effective, they require exact knowledge of the…

计算机视觉与模式识别 · 计算机科学 2021-05-04 Hoel Kervadec , Houda Bahig , Laurent Letourneau-Guillon , Jose Dolz , Ismail Ben Ayed

We study and derive algorithms for nonlinear eigenvalue problems, where the system matrix depends on the eigenvector, or several eigenvectors (or their corresponding invariant subspace). The algorithms are derived from an implicit…

数值分析 · 数学 2020-03-02 Elias Jarlebring , Parikshit Upadhyaya

Recently, instance segmentation has made great progress with the rapid development of deep neural networks. However, there still exist two main challenges including discovering indistinguishable objects and modeling the relationship between…

计算机视觉与模式识别 · 计算机科学 2023-04-19 Jinming Su , Ruihong Yin , Xingyue Chen , Junfeng Luo

The landmark recognition problem is far from being solved, but with the use of features extracted from intermediate layers of Convolutional Neural Networks (CNNs), excellent results have been obtained. In this work, we propose some…

计算机视觉与模式识别 · 计算机科学 2018-06-25 Federico Magliani , Andrea Prati

In this work we present a novel end-to-end framework for tracking and classifying a robot's surroundings in complex, dynamic and only partially observable real-world environments. The approach deploys a recurrent neural network to filter an…

机器学习 · 计算机科学 2016-04-20 Peter Ondruska , Julie Dequaire , Dominic Zeng Wang , Ingmar Posner

We study low-rank matrix regression in settings where matrix-valued predictors and scalar responses are observed across multiple individuals. Rather than assuming a fully homogeneous coefficient matrices across individuals, we accommodate…

统计方法学 · 统计学 2025-10-28 Di Wang , Xiaoyu Zhang , Guodong Li , Wenyang Zhang

While convolutional neural networks have gained impressive success recently in solving structured prediction problems such as semantic segmentation, it remains a challenge to differentiate individual object instances in the scene. Instance…

机器学习 · 计算机科学 2017-07-14 Mengye Ren , Richard S. Zemel

Instance search is an interesting task as well as a challenging issue due to the lack of effective feature representation. In this paper, an instance level feature representation built upon fully convolutional instance-aware segmentation is…

计算机视觉与模式识别 · 计算机科学 2019-05-10 Yu Zhan , Wan-Lei Zhao

In many applications it is important to understand the sensitivity of eigenvalues of a matrix polynomial to perturbations of the polynomial. The sensitivity commonly is described by condition numbers or pseudospectra. However, the…

数值分析 · 数学 2017-04-06 Silvia Noschese , Lothar Reichel

We present a model that generates natural language descriptions of images and their regions. Our approach leverages datasets of images and their sentence descriptions to learn about the inter-modal correspondences between language and…

计算机视觉与模式识别 · 计算机科学 2015-04-15 Andrej Karpathy , Li Fei-Fei

We present a new object representation, called Dense RepPoints, that utilizes a large set of points to describe an object at multiple levels, including both box level and pixel level. Techniques are proposed to efficiently process these…

计算机视觉与模式识别 · 计算机科学 2020-05-19 Ze Yang , Yinghao Xu , Han Xue , Zheng Zhang , Raquel Urtasun , Liwei Wang , Stephen Lin , Han Hu

The shape of objects is an important source of visual information in a wide range of applications. One of the core challenges of shape quantification is to ensure that the extracted measurements remain invariant to transformations that…

计算机视觉与模式识别 · 计算机科学 2025-07-02 Anna Foix Romero , Craig Russell , Alexander Krull , Virginie Uhlmann