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This paper presents a new method for shadow removal using unpaired data, enabling us to avoid tedious annotations and obtain more diverse training samples. However, directly employing adversarial learning and cycle-consistency constraints…

Computer Vision and Pattern Recognition · Computer Science 2020-05-19 Xiaowei Hu , Yitong Jiang , Chi-Wing Fu , Pheng-Ann Heng

We propose a novel deep learning method for shadow removal. Inspired by physical models of shadow formation, we use a linear illumination transformation to model the shadow effects in the image that allows the shadow image to be expressed…

Computer Vision and Pattern Recognition · Computer Science 2019-08-26 Hieu Le , Dimitris Samaras

Effective shadow removal is pivotal in enhancing the visual quality of images in various applications, ranging from computer vision to digital photography. During the last decades physics and machine learning -based methodologies have been…

Computer Vision and Pattern Recognition · Computer Science 2024-10-23 Eirini Cholopoulou , Dimitrios E. Diamantis , Dimitra-Christina C. Koutsiou , Dimitris K. Iakovidis

In recent years, various shadow detection methods from a single image have been proposed and used in vision systems; however, most of them are not appropriate for the robotic applications due to the expensive time complexity. This paper…

Computer Vision and Pattern Recognition · Computer Science 2018-03-20 Sepideh Hosseinzadeh , Moein Shakeri , Hong Zhang

Shadow removal is still a challenging task due to its inherent background-dependent and spatial-variant properties, leading to unknown and diverse shadow patterns. Even powerful state-of-the-art deep neural networks could hardly recover…

Computer Vision and Pattern Recognition · Computer Science 2021-04-13 Lan Fu , Changqing Zhou , Qing Guo , Felix Juefei-Xu , Hongkai Yu , Wei Feng , Yang Liu , Song Wang

Developing robust drone detection systems is often constrained by the limited availability of large-scale annotated training data and the high costs associated with real-world data collection. However, leveraging synthetic data generated…

Computer Vision and Pattern Recognition · Computer Science 2026-01-09 Tamara R. Lenhard , Andreas Weinmann , Kai Franke , Tobias Koch

With a wide range of shadows in many collected images, shadow removal has aroused increasing attention since uncontaminated images are of vital importance for many downstream multimedia tasks. Current methods consider the same convolution…

Computer Vision and Pattern Recognition · Computer Science 2022-08-31 Yimin Xu , Mingbao Lin , Hong Yang , Fei Chao , Rongrong Ji

Synthetic data is an increasingly popular tool for training deep learning models, especially in computer vision but also in other areas. In this work, we attempt to provide a comprehensive survey of the various directions in the development…

Machine Learning · Computer Science 2019-09-26 Sergey I. Nikolenko

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

Shadows are essential for realistic image compositing. Physics-based shadow rendering methods require 3D geometries, which are not always available. Deep learning-based shadow synthesis methods learn a mapping from the light information to…

Computer Vision and Pattern Recognition · Computer Science 2022-07-18 Yichen Sheng , Yifan Liu , Jianming Zhang , Wei Yin , A. Cengiz Oztireli , He Zhang , Zhe Lin , Eli Shechtman , Bedrich Benes

We introduce Synscapes -- a synthetic dataset for street scene parsing created using photorealistic rendering techniques, and show state-of-the-art results for training and validation as well as new types of analysis. We study the behavior…

Computer Vision and Pattern Recognition · Computer Science 2018-10-23 Magnus Wrenninge , Jonas Unger

Shadows significantly hinder computer vision tasks in outdoor environments, particularly in field robotics, where varying lighting conditions complicate object detection and localisation. We present FieldNet, a novel deep learning framework…

Computer Vision and Pattern Recognition · Computer Science 2025-07-15 Alzayat Saleh , Alex Olsen , Jake Wood , Bronson Philippa , Mostafa Rahimi Azghadi

Shadow removal in a single image has received increasing attention in recent years. However, removing shadows over dynamic scenes remains largely under-explored. In this paper, we propose the first data-driven video shadow removal model,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-17 Zhihao Chen , Liang Wan , Yefan Xiao , Lei Zhu , Huazhu Fu

Recent advances in deep learning have significantly increased the performance of face recognition systems. The performance and reliability of these models depend heavily on the amount and quality of the training data. However, the…

Computer Vision and Pattern Recognition · Computer Science 2018-02-19 Adam Kortylewski , Andreas Schneider , Thomas Gerig , Bernhard Egger , Andreas Morel-Forster , Thomas Vetter

Recent deep learning methods have achieved promising results in image shadow removal. However, their restored images still suffer from unsatisfactory boundary artifacts, due to the lack of degradation prior embedding and the deficiency in…

Computer Vision and Pattern Recognition · Computer Science 2022-12-14 Lanqing Guo , Chong Wang , Wenhan Yang , Siyu Huang , Yufei Wang , Hanspeter Pfister , Bihan Wen

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

Shadow removal is a computer-vision task that aims to restore the image content in shadow regions. While almost all recent shadow-removal methods require shadow-free images for training, in ECCV 2020 Le and Samaras introduces an innovative…

Computer Vision and Pattern Recognition · Computer Science 2021-03-25 Zhihao Liu , Hui Yin , Xinyi Wu , Zhenyao Wu , Yang Mi , Song Wang

Casually-taken portrait photographs often suffer from unflattering lighting and shadowing because of suboptimal conditions in the environment. Aesthetic qualities such as the position and softness of shadows and the lighting ratio between…

Computer Vision and Pattern Recognition · Computer Science 2020-05-21 Xuaner Cecilia Zhang , Jonathan T. Barron , Yun-Ta Tsai , Rohit Pandey , Xiuming Zhang , Ren Ng , David E. Jacobs

Shadow detection and shadow removal are fundamental and challenging tasks, requiring an understanding of the global image semantics. This paper presents a novel deep neural network design for shadow detection and removal by analyzing the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-15 Xiaowei Hu , Chi-Wing Fu , Lei Zhu , Jing Qin , Pheng-Ann Heng

Current shadow detection methods perform poorly when detecting shadow regions that are small, unclear or have blurry edges. In this work, we attempt to address this problem on two fronts. First, we propose a Fine Context-aware Shadow…

Computer Vision and Pattern Recognition · Computer Science 2021-11-30 Jeya Maria Jose Valanarasu , Vishal M. Patel