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This paper presents a method to detect reflection of 3D light detection and ranging (Lidar) scans and uses it to classify the points and also map objects outside the line of sight. Our software uses several approaches to analyze the point…

Robotics · Computer Science 2020-10-28 Xiting Zhao , Zhijie Yang , Sören Schwertfeger

This paper addresses reflection removal, which is the task of separating reflection components from a captured image and deriving the image with only transmission components. Considering that the existence of the reflection changes the…

Computer Vision and Pattern Recognition · Computer Science 2024-02-29 Wenjiao Bian , Yusuke Monno , Masatoshi Okutomi

Estimating and modelling the appearance of an object under outdoor illumination conditions is a complex process. Although there have been several studies on illumination estimation and relighting, very few of them focus on estimating the…

Computer Vision and Pattern Recognition · Computer Science 2021-05-17 Farhan Rahman Wasee , Alen Joy , Charalambos Poullis

Shadow detection is a fundamental and challenging task, since it requires an understanding of global image semantics and there are various backgrounds around shadows. This paper presents a novel network for shadow detection by analyzing…

Computer Vision and Pattern Recognition · Computer Science 2020-05-19 Xiaowei Hu , Lei Zhu , Chi-Wing Fu , Jing Qin , Pheng-Ann Heng

Symmetry is one of the significant visual properties inside an image plane, to identify the geometrically balanced structures through real-world objects. Existing symmetry detection methods rely on descriptors of the local image features…

Computer Vision and Pattern Recognition · Computer Science 2017-07-25 Mohamed Elawady , Christophe Ducottet , Olivier Alata , Cecile Barat , Philippe Colantoni

Reflections in videos are obstructions that often occur when videos are taken behind reflective surfaces like glass. These reflections reduce the quality of such videos, lead to information loss and degrade the accuracy of many computer…

Computer Vision and Pattern Recognition · Computer Science 2020-09-08 Amgad Ahmed , Suhong Kim , Mohamed Elgharib , Mohamed Hefeeda

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

Face images captured through the glass are usually contaminated by reflections. The non-transmitted reflections make the reflection removal more challenging than for general scenes, because important facial features are completely occluded.…

Computer Vision and Pattern Recognition · Computer Science 2019-03-05 Renjie Wan , Boxin Shi , Haoliang Li , Ling-Yu Duan , Alex C. Kot

Reflections in natural images commonly cause false positives in automated detection systems. These false positives can lead to significant impairment of accuracy in the tasks of detection, counting and segmentation. Here, inspired by the…

Computer Vision and Pattern Recognition · Computer Science 2019-05-01 David Owen , Ping-Lin Chang

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…

Computer Vision and Pattern Recognition · Computer Science 2025-05-13 Kangfu Mei , Luis Figueroa , Zhe Lin , Zhihong Ding , Scott Cohen , Vishal M. Patel

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 2021-11-10 Hieu Le , Dimitris Samaras

Decomposing a scene into its reflectance and shading is a challenge due to the lack of extensive ground-truth data for real-world scenes. We introduce a novel physics-based approach for intrinsic image decomposition using a pair of visible…

Computer Vision and Pattern Recognition · Computer Science 2026-04-01 Zeqing Yuan , Mani Ramanagopal , Aswin C. Sankaranarayanan , Srinivasa G. Narasimhan

"Background subtraction" is an old technique for finding moving objects in a video sequence for example, cars driving on a freeway. The idea is that subtracting the current image from a timeaveraged background image will leave only…

Computer Vision and Pattern Recognition · Computer Science 2013-02-08 Nir Friedman , Stuart Russell

Taking pictures through glass windows almost always produces undesired reflections that degrade the quality of the photo. The ill-posed nature of the reflection removal problem reached the attention of many researchers for more than…

Image and Video Processing · Electrical Eng. & Systems 2021-05-12 Andreea Birhala , Ionut Mironica

The phenomenon of reflection is quite common in digital images, posing significant challenges for various applications such as computer vision, photography, and image processing. Traditional methods for reflection removal often struggle to…

Computer Vision and Pattern Recognition · Computer Science 2025-02-14 Kangning Yang , Huiming Sun , Jie Cai , Lan Fu , Jiaming Ding , Jinlong Li , Chiu Man Ho , Zibo Meng

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…

Image and Video Processing · Electrical Eng. & Systems 2019-08-08 Suguru Yasutomi , Tatsuya Arakaki , Ryuji Hamamoto

Document shadows are a major obstacle in the digitization process. Due to the dense information in text and patterns covered by shadows, document shadow removal requires specialized methods. Existing document shadow removal methods,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-27 Yifan Liu , Jiancheng Huang , Na Liu , Mingfu Yan , Yi Huang , Shifeng Chen

Removing objects from images is a challenging problem that is important for many applications, including mixed reality. For believable results, the shadows that the object casts should also be removed. Current inpainting-based methods only…

Computer Vision and Pattern Recognition · Computer Science 2020-12-22 Edward Zhang , Ricardo Martin-Brualla , Janne Kontkanen , Brian Curless

Facial landmark detection is a very fundamental and significant vision task with many important applications. In practice, facial landmark detection can be affected by a lot of natural degradations. One of the most common and important…

Computer Vision and Pattern Recognition · Computer Science 2021-11-30 Lan Fu , Qing Guo , Felix Juefei-Xu , Hongkai Yu , Wei Feng , Yang Liu , Song Wang

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…

Computer Vision and Pattern Recognition · Computer Science 2023-11-16 Leiping Jie , Hui Zhang