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The requirement for paired shadow and shadow-free images limits the size and diversity of shadow removal datasets and hinders the possibility of training large-scale, robust shadow removal algorithms. We propose a shadow removal method that…

计算机视觉与模式识别 · 计算机科学 2020-08-04 Hieu Le , Dimitris Samaras

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…

计算机视觉与模式识别 · 计算机科学 2021-04-13 Lan Fu , Changqing Zhou , Qing Guo , Felix Juefei-Xu , Hongkai Yu , Wei Feng , Yang Liu , Song Wang

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…

计算机视觉与模式识别 · 计算机科学 2023-08-08 Yeying Jin , Aashish Sharma , Robby T. Tan

Medical ultrasound is widely used technique for diagnosing internal organs. As common artifacts, shadows often appear in ultrasound images. Detecting such shadows is curious because they prevent accurate diagnosis. In this paper, we propose…

图像与视频处理 · 电气工程与系统科学 2019-08-08 Suguru Yasutomi , Tatsuya Arakaki , Ryuji Hamamoto

Shadows encode rich information about scene geometry and illumination, yet existing methods either predict a unified shadow mask or overlook attached shadows entirely. We address this gap by proposing a framework for jointly detecting cast…

计算机视觉与模式识别 · 计算机科学 2026-03-20 Shilin Hu , Jingyi Xu , Sagnik Das , Dimitris Samaras , Hieu Le

Shadow, as a natural consequence of light interacting with objects, plays a crucial role in shaping the aesthetics of an image, which however also impairs the content visibility and overall visual quality. Recent shadow removal approaches…

计算机视觉与模式识别 · 计算机科学 2024-11-22 Hengxing Liu , Mingjia Li , Xiaojie Guo

In this paper, we present a novel deep metric learning method to tackle the multi-label image classification problem. In order to better learn the correlations among images features, as well as labels, we attempt to explore a latent space,…

计算机视觉与模式识别 · 计算机科学 2020-07-28 Changsheng Li , Chong Liu , Lixin Duan , Peng Gao , Kai Zheng

Most shadow removal methods rely on the invasion of training images associated with laborious and lavish shadow region annotations, leading to the increasing popularity of shadow image synthesis. However, the poor performance also stems…

计算机视觉与模式识别 · 计算机科学 2023-07-11 Yunshan Zhong , Lizhou You , Yuxin Zhang , Fei Chao , Yonghong Tian , Rongrong Ji

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…

计算机视觉与模式识别 · 计算机科学 2024-10-23 Eirini Cholopoulou , Dimitrios E. Diamantis , Dimitra-Christina C. Koutsiou , Dimitris K. Iakovidis

Shadows, formed by the occlusion of light, play an essential role in visual perception and directly influence scene understanding, image quality, and visual realism. This paper presents a unified survey and benchmark of deep-learning-based…

计算机视觉与模式识别 · 计算机科学 2026-03-16 Xiaowei Hu , Zhenghao Xing , Tianyu Wang , Chi-Wing Fu , Pheng-Ann Heng

Hashing has been widely used in approximate nearest search for large-scale database retrieval for its computation and storage efficiency. Deep hashing, which devises convolutional neural network architecture to exploit and extract the…

计算机视觉与模式识别 · 计算机科学 2020-06-11 Xiaopeng Zhang

We present a novel method for recovering the absolute pose and shape of a human in a pre-scanned scene given a single image. Unlike previous methods that perform sceneaware mesh optimization, we propose to first estimate absolute position…

计算机视觉与模式识别 · 计算机科学 2023-06-07 Zehong Shen , Zhi Cen , Sida Peng , Qing Shuai , Hujun Bao , Xiaowei Zhou

Recovering textures under shadows has remained a challenging problem due to the difficulty of inferring shadow-free scenes from shadow images. In this paper, we propose the use of diffusion models as they offer a promising approach to…

计算机视觉与模式识别 · 计算机科学 2025-05-13 Kangfu Mei , Luis Figueroa , Zhe Lin , Zhihong Ding , Scott Cohen , Vishal M. Patel

We propose Diff-Shadow, a global-guided diffusion model for shadow removal. Previous transformer-based approaches can utilize global information to relate shadow and non-shadow regions but are limited in their synthesis ability and recover…

计算机视觉与模式识别 · 计算机科学 2024-12-20 Jinting Luo , Ru Li , Chengzhi Jiang , Xiaoming Zhang , Mingyan Han , Ting Jiang , Haoqiang Fan , Shuaicheng Liu

Shadow detection is commonly formulated as a vision-driven dense prediction problem, where models rely primarily on pixel-wise visual supervision to distinguish shadows from non-shadow regions. However, this formulation can become…

计算机视觉与模式识别 · 计算机科学 2026-05-13 Yonghui Wang , Wengang Zhou , Hao Feng , Houqiang Li

This paper presents a novel approach to learn and detect distinctive regions on 3D shapes. Unlike previous works, which require labeled data, our method is unsupervised. We conduct the analysis on point sets sampled from 3D shapes, then…

图形学 · 计算机科学 2020-04-22 Xianzhi Li , Lequan Yu , Chi-Wing Fu , Daniel Cohen-Or , Pheng-Ann Heng

Segment anything model (SAM) has shown its spectacular performance in segmenting universal objects, especially when elaborate prompts are provided. However, the drawback of SAM is twofold. On the first hand, it fails to segment specific…

计算机视觉与模式识别 · 计算机科学 2023-11-16 Leiping Jie , Hui Zhang

This paper presents a survey and a comparative evaluation of recent techniques for moving cast shadow detection. We identify shadow removal as a critical step for improving object detection and tracking. The survey covers methods published…

计算机视觉与模式识别 · 计算机科学 2013-04-05 Andres Sanin , Conrad Sanderson , Brian C. Lovell

We describe an approach to learning rich representations for images, that enables simple and effective predictors in a range of vision tasks involving spatially structured maps. Our key idea is to map small image elements to feature…

计算机视觉与模式识别 · 计算机科学 2019-09-02 Mohammadreza Mostajabi

Recovering shadows is an important step for many vision algorithms. Current approaches that work with time-lapse sequences are limited to simple thresholding heuristics. We show these approaches only work with very careful tuning of…

计算机视觉与模式识别 · 计算机科学 2013-04-16 Austin Abrams , Chris Hawley , Kylia Miskell , Adina Stoica , Nathan Jacobs , Robert Pless