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Prior-based methods for low-light image enhancement often face challenges in extracting available prior information from dim images. To overcome this limitation, we introduce a simple yet effective Retinex model with the proposed edge…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Chaoyan Huang , Zhongming Wu , Tieyong Zeng

The perfectly matched layers (PML) and exterior complex scaling (ECS) methods for absorbing boundary conditions are analyzed using spectral decomposition. Both methods are derived through analytical continuations from unitary to contractive…

Computational Physics · Physics 2015-06-16 A. Scrinzi , H. P. Stimming , N. J . Mauser

Accurately segmenting brain lesions in MRI scans is critical for providing patients with prognoses and neurological monitoring. However, the performance of CNN-based segmentation methods is constrained by the limited training set size.…

Image and Video Processing · Electrical Eng. & Systems 2023-07-06 Jiayu Huo , Yang Liu , Xi Ouyang , Alejandro Granados , Sebastien Ourselin , Rachel Sparks

Infrared small target detection is crucial for remote sensing applications like disaster warning and maritime surveillance. However, due to the lack of distinctive texture and morphological features, infrared small targets are highly…

Computer Vision and Pattern Recognition · Computer Science 2025-09-26 Jiayi Zuo , Songwei Pei , Qian Li

Anti-collision assistance, integral to the current drive towards increased vehicular autonomy, relies heavily on precise detection and localization of moving targets in the vehicle's vicinity. A crucial step towards achieving this is the…

Signal Processing · Electrical Eng. & Systems 2024-12-18 Xiangyu Gao , Sumit Roy , Lyutianyang Zhang

Spectral super-resolution that aims to recover hyperspectral image (HSI) from easily obtainable RGB image has drawn increasing interest in the field of computational photography. The crucial aspect of spectral super-resolution lies in…

Image and Video Processing · Electrical Eng. & Systems 2024-03-19 Hongyuan Wang , Lizhi Wang , Jiang Xu , Chang Chen , Xue Hu , Fenglong Song , Youliang Yan

Multi-layer networks or multiplex networks are generally considered as the networks that have the same set of vertices but different types of edges. Multi-layer networks are especially useful when describing the systems with several kinds…

Physics and Society · Physics 2018-12-31 Rui-jie Wu , Yi-Xiu Kong , Gui-Yuan Shi , Yi-Cheng Zhang

Traditional snapshot hyperspectral imaging systems generally require multiple refractive-optics-based elements to modulate light, resulting in bulky framework. In pursuit of a more compact form factor, a metasurface-based snapshot…

Optics · Physics 2022-11-29 Qiangbo Zhang , Zeqing Yu , Xinyu Liu , Chang Wang , Zhenrong Zheng

This paper presents a simple and effective method to study the spectral and energy efficiency (SE-EE) trade-off in cellular networks, an issue that has attracted significant recent interest in the wireless community. The proposed…

Information Theory · Computer Science 2016-11-18 Dimitrios Tsilimantos , Jean-Marie Gorce , Katia Jaffrès-Runser , H. Vincent Poor

Image harmonization task aims at harmonizing different composite foreground regions according to specific background image. Previous methods would rather focus on improving the reconstruction ability of the generator by some internal…

Computer Vision and Pattern Recognition · Computer Science 2022-12-14 Jingtang Liang , Chi-Man Pun

Spectral computed tomography has received considerable interest in recent years since spectral measurements contain much richer information about the object of interest. In spectral computed tomography, we are interested in the energy…

Numerical Analysis · Mathematics 2022-03-04 Katrine O Bangsgaard , Genoveva Burca , Evelina Ametova , Martin S Andersen , Jakob S Jørgensen

Deep learning solutions of the salient object detection problem have achieved great results in recent years. The majority of these models are based on encoders and decoders, with a different multi-feature combination. In this paper, we show…

Computer Vision and Pattern Recognition · Computer Science 2021-10-25 Hazarapet Tunanyan

Edge-preserving smoothing (EPS) can be formulated as minimizing an objective function that consists of data and prior terms. This global EPS approach shows better smoothing performance than a local one that typically has a form of weighted…

Computer Vision and Pattern Recognition · Computer Science 2016-04-27 Youngjung Kim , Dongbo Min , Bumsub Ham , Kwanghoon Sohn

We propose a multiscale method for elliptic problems on complex domains, e.g. domains with cracks or complicated boundary. For local singularities this paper also offers a discrete alternative to enrichment techniques such as XFEM. We…

Numerical Analysis · Mathematics 2016-11-01 Daniel Elfverson , Mats G. Larson , Axel Målqvist

Harmonic lasing in a free electron laser with a planar undulator (under the condition that the fundamental frequency is suppressed) might be a cheap and efficient way of extension of wavelength ranges of existing and planned X-ray FEL…

Accelerator Physics · Physics 2015-06-05 E. A. Schneidmiller , M. V. Yurkov

In this study, we tackle the challenging fine-grained edge detection task, which refers to predicting specific edges caused by reflectance, illumination, normal, and depth changes, respectively. Prior methods exploit multi-scale…

Computer Vision and Pattern Recognition · Computer Science 2023-08-08 Shaocong Xu , Xiaoxue Chen , Yuhang Zheng , Guyue Zhou , Yurong Chen , Hongbin Zha , Hao Zhao

AI inference at the edge is becoming increasingly common for low-latency services. However, edge environments are power- and resource-constrained, and susceptible to failures. Conventional failure resilience approaches, such as cloud…

Analysing extended emission in photometric observations of star-forming regions requires maps free from compact foreground, embedded, and background sources, which can interfere with various techniques used to characterise the interstellar…

Instrumentation and Methods for Astrophysics · Physics 2025-04-02 M. Madarász , G. Marton , I. Gezer , S. Lehner , J. Roquette , M. Audard , D. Hernandez , O. Dionatos

Ultra-low field magnetic resonance imaging(ULF-MRI) systems operating in open environments are highly susceptible to composite electromagnetic interference(EMI). Different imaging channels respond non-uniformly to EMI owing to their…

Signal Processing · Electrical Eng. & Systems 2025-09-09 Jiali He , Sheng Shen , Jiamin Wu , Xiaohan Kong , Yamei Dai , Liang Tan , Zheng Xu

Many edge and contour detection algorithms give a soft-value as an output and the final binary map is commonly obtained by applying an optimal threshold. In this paper, we propose a novel method to detect image contours from the extracted…

Computer Vision and Pattern Recognition · Computer Science 2021-05-12 Zahra Mousavi Kouzehkanan , Reshad Hosseini , Babak Nadjar Araabi
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