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Synthetic aperture sonar (SAS) image reconstruction, or beamforming as it is often referred to within the SAS community, comprises a class of computationally intensive algorithms for creating coherent high-resolution imagery from successive…

信号处理 · 电气工程与系统科学 2021-05-27 Isaac D. Gerg , Daniel C. Brown , Stephen G. Wagner , Daniel Cook , Brian N. O'Donnell , Thomas Benson , Thomas C. Montgomery

Supervised fine-tuning (SFT) is crucial for adapting Large Language Models (LLMs) to specific tasks. In this work, we demonstrate that the order of training data can lead to significant training imbalances, potentially resulting in…

计算与语言 · 计算机科学 2024-10-08 Yiming Ju , Ziyi Ni , Xingrun Xing , Zhixiong Zeng , hanyu Zhao , Siqi Fan , Zheng Zhang

Among underwater perceptual sensors, imaging sonar has been highlighted for its perceptual robustness underwater. The major challenge of imaging sonar, however, arises from the difficulty in defining visual features despite limited…

机器人学 · 计算机科学 2018-10-19 Sejin Lee , Byungjae Park , Ayoung Kim

Autonomous navigation in underwater environments presents challenges due to factors such as light absorption and water turbidity, limiting the effectiveness of optical sensors. Sonar systems are commonly used for perception in underwater…

计算机视觉与模式识别 · 计算机科学 2023-09-26 Ivano Donadi , Emilio Olivastri , Daniel Fusaro , Wanmeng Li , Daniele Evangelista , Alberto Pretto

Deep learning approaches have shown promising performance for compressed sensing-based Magnetic Resonance Imaging. While deep neural networks trained with mean squared error (MSE) loss functions can achieve high peak signal to noise ratio,…

Learning generalized representations from limited training samples is crucial for applying deep neural networks in low-resource scenarios. Recently, methods based on Contrastive Language-Image Pre-training (CLIP) have exhibited promising…

计算机视觉与模式识别 · 计算机科学 2023-12-08 Yao Zhu , Yuefeng Chen , Wei Wang , Xiaofeng Mao , Xiu Yan , Yue Wang , Zhigang Li , Wang lu , Jindong Wang , Xiangyang Ji

Satellite-based Synthetic Aperture Radar (SAR) images can be used as a source of remote sensed imagery regardless of cloud cover and day-night cycle. However, the speckle noise and varying image acquisition conditions pose a challenge for…

计算机视觉与模式识别 · 计算机科学 2023-11-03 Janne Alatalo , Tuomo Sipola , Mika Rantonen

Semantic segmentation requires pixel-level annotation, which is time-consuming. Active Learning (AL) is a promising method for reducing data annotation costs. Due to the gap between aerial and natural images, the previous AL methods are not…

计算机视觉与模式识别 · 计算机科学 2024-05-29 Lianlei Shan , Weiqiang Wang , Ke Lv , Bin Luo

Rapid developments in synthetic aperture (SA) systems, which generate a larger aperture with greater angular resolution than is inherently possible from the physical dimensions of a single sensor alone, are leading to novel research avenues…

Interpretability is a pressing issue for decision systems. Many post hoc methods have been proposed to explain the predictions of a single machine learning model. However, business processes and decision systems are rarely centered around a…

机器学习 · 计算机科学 2023-03-22 Gianluigi Lopardo , Damien Garreau , Frederic Precioso , Greger Ottosson

Sparse autoencoders (SAEs) have received considerable recent attention as tools for mechanistic interpretability, showing success at extracting interpretable features even from very large LLMs. However, this research has been largely…

机器学习 · 计算机科学 2025-05-20 Jeremy Budd , Javier Ideami , Benjamin Macdowall Rynne , Keith Duggar , Randall Balestriero

Acoustic sensors play an important role in autonomous underwater vehicles (AUVs). Sidescan sonar (SSS) detects a wide range and provides photo-realistic images in high resolution. However, SSS projects the 3D seafloor to 2D images, which…

计算机视觉与模式识别 · 计算机科学 2023-04-20 Weiqi Xu , Li Ling , Yiping Xie , Jun Zhang , John Folkesson

The solution of a fine tuning problem is one of the principal motivations of Supersymmetry. However experimental constraints indicate that many Supersymmetric models are also fine tuned (although to a much lesser extent). We review the…

高能物理 - 唯象学 · 物理学 2015-05-13 Peter Athron , D. J. Miller

In the context of human-in-the-loop Machine Learning applications, like Decision Support Systems, interpretability approaches should provide actionable insights without making the users wait. In this paper, we propose Accelerated…

机器学习 · 计算机科学 2021-12-24 David Dandolo , Chiara Masiero , Mattia Carletti , Davide Dalle Pezze , Gian Antonio Susto

Side-look synthetic aperture sonar (SAS) can produce very high quality images of the sea-floor. When viewing this imagery, a human observer can often easily identify various sea-floor textures such as sand ripple, hard-packed sand, sea…

计算机视觉与模式识别 · 计算机科学 2017-10-02 Alina Zare , Nicholas Young , Daniel Suen , Thomas Nabelek , Aquila Galusha , James Keller

Evaluating synthetic tabular data is challenging, since they can differ from the real data in so many ways. There exist numerous metrics of synthetic data quality, ranging from statistical distances to predictive performance, often…

机器学习 · 计算机科学 2025-04-30 Jan Kapar , Niklas Koenen , Martin Jullum

The contrasts and magnitude of observable signatures of small-scale features degrade as angular resolution decreases. High-cadence time-series of synthetic observable maps at 1.25 mm were produced from 3D magnetohydrodynamic Bifrost…

太阳与恒星天体物理 · 物理学 2023-01-18 Henrik Eklund

Huge imbalance of different scenes' sample numbers seriously reduces Synthetic Aperture Radar (SAR) ship detection accuracy. Thus, to solve this problem, this letter proposes a Balance Scene Learning Mechanism (BSLM) for offshore and…

计算机视觉与模式识别 · 计算机科学 2020-09-22 Tianwen Zhang , Xiaoling Zhang , Jun Shi , Shunjun Wei , Jianguo Wang , Jianwei Li , Hao Su , Yue Zhou

We present a multiscale approach for identifying features in ocean beds by solving inverse problems in high frequency seafloor acoustics. The setting is based on Sound Navigation And Ranging (SONAR) imaging used in scientific, commercial,…

数值分析 · 数学 2017-04-05 Bjorn Engquist , Christina Frederick , Quyen Huynh , Haomin Zhou

Data mixing augmentation has proved effective in training deep models. Recent methods mix labels mainly based on the mixture proportion of image pixels. As the main discriminative information of a fine-grained image usually resides in…

计算机视觉与模式识别 · 计算机科学 2020-12-10 Shaoli Huang , Xinchao Wang , Dacheng Tao