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Foreground segmentation is an essential task in the field of image understanding. Under unsupervised conditions, different images and instances always have variable expressions, which make it difficult to achieve stable segmentation…

Computer Vision and Pattern Recognition · Computer Science 2020-05-22 Xi Li , Huimin Ma , Hongbing Ma , Yidong Wang

In this paper we present S3R-Net, the Self-Supervised Shadow Removal Network. The two-branch WGAN model achieves self-supervision relying on the unify-and-adaptphenomenon - it unifies the style of the output data and infers its…

Computer Vision and Pattern Recognition · Computer Science 2024-04-19 Nikolina Kubiak , Armin Mustafa , Graeme Phillipson , Stephen Jolly , Simon Hadfield

Low-light image enhancement is a classical computer vision problem aiming to recover normal-exposure images from low-light images. However, convolutional neural networks commonly used in this field are good at sampling low-frequency local…

Computer Vision and Pattern Recognition · Computer Science 2022-09-19 Yunliang Zhuang , Zhuoran Zheng , Chen Lyu

Shadow removal from a single image is generally still an open problem. Most existing learning-based methods use supervised learning and require a large number of paired images (shadow and corresponding non-shadow images) for training. A…

Computer Vision and Pattern Recognition · Computer Science 2023-08-08 Yeying Jin , Aashish Sharma , Robby T. Tan

Image deblurring plays a crucial role in enhancing visual clarity across various applications. Although most deep learning approaches primarily focus on sRGB images, which inherently lose critical information during the image signal…

Image and Video Processing · Electrical Eng. & Systems 2025-09-22 Wenlong Jiao , Binglong Li , Wei Shang , Ping Wang , Dongwei Ren

To fully leverage spatial information for remote sensing image segmentation and address semantic edge ambiguities caused by grayscale variations (e.g., shadows and low-contrast regions), we propose the Frequency and Spatial Domains based…

Computer Vision and Pattern Recognition · Computer Science 2025-10-02 Jiahao Fu , Yinfeng Yu , Liejun Wang

Shadow detection is a fundamental and challenging task in many computer vision applications. Intuitively, most shadows come from the occlusion of light by the object itself, resulting in the object and its shadow being contiguous (referred…

Computer Vision and Pattern Recognition · Computer Science 2024-08-08 Yonghui Wang , Shaokai Liu , Li Li , Wengang Zhou , Houqiang Li

Fully-supervised shadow removal methods achieve the best restoration qualities on public datasets but still generate some shadow remnants. One of the reasons is the lack of large-scale shadow & shadow-free image pairs. Unsupervised methods…

Computer Vision and Pattern Recognition · Computer Science 2023-10-03 Xiaoguang Li , Qing Guo , Rabab Abdelfattah , Di Lin , Wei Feng , Ivor Tsang , Song Wang

Single-image dehazing is a pivotal challenge in computer vision that seeks to remove haze from images and restore clean background details. Recognizing the limitations of traditional physical model-based methods and the inefficiencies of…

Computer Vision and Pattern Recognition · Computer Science 2024-07-17 Lihan Tong , Yun Liu , Weijia Li , Liyuan Chen , Erkang Chen

When light is scattered or reflected accidentally in the lens, flare artifacts may appear in the captured photos, affecting the photos' visual quality. The main challenge in flare removal is to eliminate various flare artifacts while…

Computer Vision and Pattern Recognition · Computer Science 2024-06-27 Yiguo Jiang , Xuhang Chen , Chi-Man Pun , Shuqiang Wang , Wei Feng

In general, intrinsic image decomposition algorithms interpret shading as one unified component including all photometric effects. As shading transitions are generally smoother than reflectance (albedo) changes, these methods may fail in…

Computer Vision and Pattern Recognition · Computer Science 2021-01-22 Anil S. Baslamisli , Partha Das , Hoang-An Le , Sezer Karaoglu , Theo Gevers

Change detection from high-resolution remote sensing images lies as a cornerstone of Earth observation applications, yet its efficacy is often compromised by two critical challenges. First, false alarms are prevalent as models misinterpret…

Computer Vision and Pattern Recognition · Computer Science 2025-09-09 Zhongxiang Xie , Shuangxi Miao , Yuhan Jiang , Zhewei Zhang , Jing Yao , Xuecao Li , Jianxi Huang , Pedram Ghamisi

The deep learning technique has been employed in removing foreground contaminants from 21 cm intensity mapping, but its effectiveness is limited by the large dynamic range of the foreground amplitude. In this study, we develop a novel…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-13 Feng Shi , Haoxiang Chang , Le Zhang , Huanyuan Shan , Jiajun Zhang , Suiping Zhou , Ming Jiang , Zitong Wang

Shadows in scanned documents pose significant challenges for document analysis and recognition tasks due to their negative impact on visual quality and readability. Current shadow removal techniques, including traditional methods and deep…

Computer Vision and Pattern Recognition · Computer Science 2024-07-31 Ziyang Zhou , Yingtie Lei , Xuhang Chen , Shenghong Luo , Wenjun Zhang , Chi-Man Pun , Zhen Wang

In this paper, we propose a novel two-stage context-aware network named CANet for shadow removal, in which the contextual information from non-shadow regions is transferred to shadow regions at the embedded feature spaces. At Stage-I, we…

Computer Vision and Pattern Recognition · Computer Science 2021-08-24 Zipei Chen , Chengjiang Long , Ling Zhang , Chunxia Xiao

Unsupervised shadow removal aims to learn a non-linear function to map the original image from shadow domain to non-shadow domain in the absence of paired shadow and non-shadow data. In this paper, we develop a simple yet efficient…

Computer Vision and Pattern Recognition · Computer Science 2021-06-01 Chao Tan , Xin Feng

High dynamic range (HDR) imaging from multiple low dynamic range (LDR) images has been suffering from ghosting artifacts caused by scene and objects motion. Existing methods, such as optical flow based and end-to-end deep learning based…

Image and Video Processing · Electrical Eng. & Systems 2023-11-09 Tianhong Dai , Wei Li , Xilei Cao , Jianzhuang Liu , Xu Jia , Ales Leonardis , Youliang Yan , Shanxin Yuan

Shadow removal can significantly improve the image visual quality and has many applications in computer vision. Deep learning methods based on CNNs have become the most effective approach for shadow removal by training on either paired…

Computer Vision and Pattern Recognition · Computer Science 2021-01-14 Zhihao Liu , Hui Yin , Yang Mi , Mengyang Pu , Song Wang

Intense light sources often produce flares in captured images at night, which deteriorates the visual quality and negatively affects downstream applications. In order to train an effective flare removal network, a reliable dataset is…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Lishen Qu , Shihao Zhou , Jinshan Pan , Jinglei Shi , Duosheng Chen , Jufeng Yang

The surge in interest regarding image dehazing has led to notable advancements in deep learning-based single image dehazing approaches, exhibiting impressive performance in recent studies. Despite these strides, many existing methods fall…

Computer Vision and Pattern Recognition · Computer Science 2025-01-20 Seongmin Hwang , Daeyoung Han , Cheolkon Jung , Moongu Jeon