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We consider the inverse problem of determining the geometry of penetrable objects from scattering data generated by one incident wave at a fixed frequency. We first study an orthogonality sampling type method which is fast, simple to…

数值分析 · 数学 2022-07-21 Thu Le , Dinh-Liem Nguyen , Vu Nguyen , Trung Truong

We propose a deep learning-based framework for instance-level object segmentation. Our method mainly consists of three steps. First, We train a generic model based on ResNet-101 for foreground/background segmentations. Second, based on this…

计算机视觉与模式识别 · 计算机科学 2017-09-15 Jingchun Cheng , Sifei Liu , Yi-Hsuan Tsai , Wei-Chih Hung , Shalini De Mello , Jinwei Gu , Jan Kautz , Shengjin Wang , Ming-Hsuan Yang

The sound of crashing waves, the roar of fast-moving cars -- sound conveys important information about the objects in our surroundings. In this work, we show that ambient sounds can be used as a supervisory signal for learning visual…

计算机视觉与模式识别 · 计算机科学 2017-12-21 Andrew Owens , Jiajun Wu , Josh H. McDermott , William T. Freeman , Antonio Torralba

Image blur and image noise are common distortions during image acquisition. In this paper, we systematically study the effect of image distortions on the deep neural network (DNN) image classifiers. First, we examine the DNN classifier…

计算机视觉与模式识别 · 计算机科学 2017-01-10 Yiren Zhou , Sibo Song , Ngai-Man Cheung

Deep learning is a fast-growing machine learning approach to perceive and understand large amounts of data. In this paper, general information about the deep learning approach which is attracted much attention in the field of machine…

图像与视频处理 · 电气工程与系统科学 2018-08-28 Çağrı Kaymak , Ayşegül Uçar

Real-world image denoising is an extremely important image processing problem, which aims to recover clean images from noisy images captured in natural environments. In recent years, diffusion models have achieved very promising results in…

计算机视觉与模式识别 · 计算机科学 2023-05-09 Cheng Yang , Lijing Liang , Zhixun Su

Motivated by the fact that characteristics of different sound classes are highly diverse in different temporal scales and hierarchical levels, a novel deep convolutional neural network (CNN) architecture is proposed for the environmental…

声音 · 计算机科学 2018-06-15 Boqing Zhu , Kele Xu , Dezhi Wang , Lilun Zhang , Bo Li , Yuxing Peng

Deep learning has dramatically improved the performance of sounds recognition. However, learning acoustic models directly from the raw waveform is still challenging. Current waveform-based models generally use time-domain convolutional…

声音 · 计算机科学 2018-03-29 Boqing Zhu , Changjian Wang , Feng Liu , Jin Lei , Zengquan Lu , Yuxing Peng

The primary issue in inverse halftoning is removing noisy dots on flat areas and restoring image structures (e.g., lines, patterns) on textured areas. Hence, a new structure-aware deep convolutional neural network that incorporates two…

图像与视频处理 · 电气工程与系统科学 2021-02-10 Chang-Hwan Son

Extracting information related to weather and visual conditions at a given time and space is indispensable for scene awareness, which strongly impacts our behaviours, from simply walking in a city to riding a bike, driving a car, or…

计算机视觉与模式识别 · 计算机科学 2019-10-23 Mohamed R. Ibrahim , James Haworth , Tao Cheng

Accurate noise modelling is important for training of deep learning reconstruction algorithms. While noise models are well known for traditional imaging techniques, the noise distribution of a novel sensor may be difficult to determine a…

机器学习 · 计算机科学 2018-07-11 Felix Horger , Tobias Würfl , Vincent Christlein , Andreas Maier

Detecting and evaluating surface coating defects is important for marine vessel maintenance. Currently, the assessment is carried out manually by qualified inspectors using international standards and their own experience. Automating the…

计算机视觉与模式识别 · 计算机科学 2022-03-21 Li Yu , Kareem Metwaly , James Z. Wang , Vishal Monga

Conventional deep learning-based image reconstruction methods require a large amount of training data which can be hard to obtain in practice. Untrained deep learning methods overcome this limitation by training a network to invert a…

图像与视频处理 · 电气工程与系统科学 2024-07-09 Carlos Osorio Quero , Daniel Leykam , Irving Rondon Ojeda

In this paper, we propose a fully convolutional networks for iterative non-blind deconvolution We decompose the non-blind deconvolution problem into image denoising and image deconvolution. We train a FCNN to remove noises in the gradient…

计算机视觉与模式识别 · 计算机科学 2016-11-22 Jiawei Zhang , Jinshan Pan , Wei-Sheng Lai , Rynson Lau , Ming-Hsuan Yang

In this work, by introducing the seismic impedance tensor we propose a new Rayleigh wave dispersion function in a homogeneous and layered medium of the Earth, which provides an efficient way to compute the dispersion curve -- a relation…

数值分析 · 数学 2021-06-29 Jianxun Yang , Chen Xu , Ye Zhang

A novel multi-level method for partial differential equations with uncertain parameters is proposed. The principle behind the method is that the error between grid levels in multi-level methods has a spatial structure that is by good…

数值分析 · 数学 2020-04-29 Yous van Halder , Benjamin Sanderse , Barry Koren

Image smoothing is a fundamental task in computer vision, that aims to retain salient structures and remove insignificant textures. In this paper, we aim to address the fundamental shortcomings of existing image smoothing methods, which…

计算机视觉与模式识别 · 计算机科学 2018-05-09 Kaiyue Lu , Shaodi You , Nick Barnes

Recovering a signal from its Fourier intensity underlies many important applications, including lensless imaging and imaging through scattering media. Conventional algorithms for retrieving the phase suffer when noise is present but display…

图像与视频处理 · 电气工程与系统科学 2020-03-05 Yaotian Wang , Xiaohang Sun , Jason W. Fleischer

Spectrum sensing is a key technology for cognitive radios. We present spectrum sensing as a classification problem and propose a sensing method based on deep learning classification. We normalize the received signal power to overcome the…

信号处理 · 电气工程与系统科学 2019-09-16 Shilian Zheng , Shichuan Chen , Peihan Qi , Huaji Zhou , Xiaoniu Yang

Automated surface segmentation is important and challenging in many medical image analysis applications. Recent deep learning based methods have been developed for various object segmentation tasks. Most of them are a classification based…

图像与视频处理 · 电气工程与系统科学 2020-07-03 Leixin Zhou , Xiaodong Wu