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Wavefront sensors have now become core components in the fields of metrology of optical systems, biomedical optics, and adaptive optics systems for astronomy. However, none of the designs used or proposed so far achieve simultaneously a…

光学 · 物理学 2024-07-04 F. Henault , Y. Feng , J. -J. Correia , L. Schreiber , A. Spang

A method for object classification that is based on distribution analysis is proposed. In addition, a method for finding relevant features and the unification of this algorithm with another classification algorithm is proposed. The…

机器学习 · 计算机科学 2021-11-09 Thomas Olschewski

Objective: To present an overview on the current state of the art concerning metrics-based quality evaluation of software components and component assemblies. Method: Comparison of several approaches available in the literature, using a…

软件工程 · 计算机科学 2011-10-03 Miguel Goulão , Fernando Brito e Abreu

In this paper, we propose SparseDet for end-to-end 3D object detection from point cloud. Existing works on 3D object detection rely on dense object candidates over all locations in a 3D or 2D grid following the mainstream methods for object…

计算机视觉与模式识别 · 计算机科学 2022-06-03 Jianhong Han , Zhaoyi Wan , Zhe Liu , Jie Feng , Bingfeng Zhou

Although much progress has been made in classification with high-dimensional features \citep{Fan_Fan:2008, JGuo:2010, CaiSun:2014, PRXu:2014}, classification with ultrahigh-dimensional features, wherein the features much outnumber the…

机器学习 · 统计学 2016-11-14 Yanming Li , Hyokyoung Hong , Jian Kang , Kevin He , Ji Zhu , Yi Li

Accurately measuring mechanical displacements is essential for a vast portion of current technologies. Several optical techniques accomplish this task, allowing for non-contact sensing even below the diffraction limit. Here we introduce an…

3D object detection plays an important role in a large number of real-world applications. It requires us to estimate the localizations and the orientations of 3D objects in real scenes. In this paper, we present a new network architecture…

计算机视觉与模式识别 · 计算机科学 2019-09-25 Xin Zhao , Zhe Liu , Ruolan Hu , Kaiqi Huang

The purpose of this work is to provide theoretically grounded assessment on both the field-of-view and the bandwidth of a lensless holographic setup. Indeed, while previous works have presented results with super-resolution and…

信号处理 · 电气工程与系统科学 2021-03-23 Ferréol Soulez

The bandwidth of a kernel function is a crucial parameter in the mean shift algorithm. This paper proposes a novel adaptive bandwidth strategy which contains three main contributions. (1) The differences among different adaptive bandwidth…

计算机视觉与模式识别 · 计算机科学 2017-12-25 Fanyang Meng , Hong Liu , Yongsheng Liang , Wei Liu , Jihong Pei

Wavelets are closely related to the Schr\"odinger's wave functions and the interpretation of Born. Similarly to the appearance of atomic orbital, it is proposed to combine anti-symmetric wavelets into orbital wavelets. The proposed approach…

信号处理 · 电气工程与系统科学 2020-10-02 H. M. de Oliveira , V. V. Vermehren , R. J. Cintra

Anomaly detection methods have demonstrated remarkable success across various applications. However, assessing their performance, particularly at the pixel-level, presents a complex challenge due to the severe imbalance that is most…

计算机视觉与模式识别 · 计算机科学 2023-10-26 Mehdi Rafiei , Toby P. Breckon , Alexandros Iosifidis

Visual affordance segmentation identifies image regions of an object an agent can interact with. Existing methods re-use and adapt learning-based architectures for semantic segmentation to the affordance segmentation task and evaluate on…

计算机视觉与模式识别 · 计算机科学 2025-05-27 Tommaso Apicella , Alessio Xompero , Paolo Gastaldo , Andrea Cavallaro

The modern image search system requires semantic understanding of image, and a key yet under-addressed problem is to learn a good metric for measuring the similarity between images. While deep metric learning has yielded impressive…

计算机视觉与模式识别 · 计算机科学 2017-08-08 Jian Wang , Feng Zhou , Shilei Wen , Xiao Liu , Yuanqing Lin

Semantic segmentation aims to robustly predict coherent class labels for entire regions of an image. It is a scene understanding task that powers real-world applications (e.g., autonomous navigation). One important application, the use of…

计算机视觉与模式识别 · 计算机科学 2023-02-16 Yuxiang Zhang , Sachin Mehta , Anat Caspi

We present a practical apparatus for characterizing optical aberrations of large collimation mirrors and lenses, and give a detailed analysis of wavefront-detection errors. We utilize a scanning pentaprism technique for precise measurements…

光学 · 物理学 2022-05-13 Youn Seok Lee , Kimia Mohammadi , Thomas Jennewein

In this paper, we consider the channel estimation problem in Millimeter wave (mmWave) wireless systems with large antenna arrays. By exploiting the inherent sparse nature of the mmWave channel, we develop a novel rate-adaptive channel…

信息论 · 计算机科学 2016-09-12 Matthew Kokshoorn , He Chen , Yonghui Li , Branka Vucetic

We propose a new class of kernels to simplify the design of filters for image interpolation and resizing. Their properties are defined according to two parameters, specifying the width of the transition band and the height of a unique…

图像与视频处理 · 电气工程与系统科学 2023-12-05 Amir Said

Our goal in this paper is to develop an effective estimator of fractal dimension. We survey existing ideas in dimension estimation, with a focus on the currently popular method of Grassberger and Procaccia for the estimation of correlation…

数据分析、统计与概率 · 物理学 2014-01-17 Shohei Hidaka , Neeraj Kashyap

When designing multispectral imaging systems for classifying different spectra it is necessary to choose a small number of filters from a set with several hundred different ones. Tackling this problem by full search leads to a tremendous…

图像与视频处理 · 电气工程与系统科学 2023-01-19 Frank Sippel , Jürgen Seiler , André Kaup

Accurate lesion segmentation in ultrasound images is essential for preventive screening and clinical diagnosis, yet remains challenging due to low contrast, blurry boundaries, and significant scale variations. Although existing deep…

计算机视觉与模式识别 · 计算机科学 2026-04-16 Chen Wang , Yixin Zhu , Yongbin Zhu , Fengyuan Shi , Qi Li , Jun Wang , Zuozhu Liu , Keli Hu