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Deep image prior (DIP) is a recently proposed technique for solving imaging inverse problems by fitting the reconstructed images to the output of an untrained convolutional neural network. Unlike pretrained feedforward neural networks, the…

Computer Vision and Pattern Recognition · Computer Science 2022-09-20 Kevin Zhang , Mingyang Xie , Maharshi Gor , Yi-Ting Chen , Yvonne Zhou , Christopher A. Metzler

This paper aims at recovering the shape of a scene with unknown, non-Lambertian, and possibly spatially-varying surface materials. When the shape of the object is highly complex and that shadows cast on the surface, the task becomes very…

Computer Vision and Pattern Recognition · Computer Science 2022-03-25 Junxuan Li , Hongdong Li

This project aims to adopt preprocessing operations to get less distortions for shadow image enlargement. The preprocessing operations consists of three main steps: first enlarge the original shadow image by using any kind of interpolation…

Computer Vision and Pattern Recognition · Computer Science 2021-02-24 Raid R. Al-Nima , Ali N. Hamoodi , Radhwan Y. Al-Jawadi , Ziad S. Mohammad

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

Shadow detection and removal is a challenging problem in the analysis of hyperspectral images. Yet, this step is crucial for analyzing data for remote sensing applications like methane detection. In this work, we develop a shadow detection…

Data Analysis, Statistics and Probability · Physics 2023-12-27 Core Francisco Park , Maya Nasr , Manuel Pérez-Carrasco , Eleanor Walker , Douglas Finkbeiner , Cecilia Garraffo

We introduce a high-fidelity portrait shadow removal model that can effectively enhance the image of a portrait by predicting its appearance under disturbing shadows and highlights. Portrait shadow removal is a highly ill-posed problem…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Jae Shin Yoon , Zhixin Shu , Mengwei Ren , Xuaner Zhang , Yannick Hold-Geoffroy , Krishna Kumar Singh , He Zhang

Lighting normalization is a crucial but underexplored restoration task with broad applications. However, existing works often simplify this task within the context of shadow removal, limiting the light sources to one and oversimplifying the…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Florin-Alexandru Vasluianu , Tim Seizinger , Zongwei Wu , Rakesh Ranjan , Radu Timofte

Image harmonization aims at adjusting the appearance of the foreground to make it more compatible with the background. Without exploring background illumination and its effects on the foreground elements, existing works are incapable of…

Computer Vision and Pattern Recognition · Computer Science 2023-09-19 Zhongyun Hu , Ntumba Elie Nsampi , Xue Wang , Qing Wang

Supervised learning with a convolutional neural network is recognized as a powerful means of image restoration. However, most such methods have been designed for application to grayscale and/or color images; therefore, they have limited…

Image and Video Processing · Electrical Eng. & Systems 2019-07-02 Ryuji Imamura , Tatsuki Itasaka , Masahiro Okuda

Many efforts have been devoted to designing sampling, mining, and weighting strategies in high-level deep metric learning (DML) loss objectives. However, little attention has been paid to low-level but essential data transformation. In this…

Computer Vision and Pattern Recognition · Computer Science 2021-05-24 Zhiyuan Chen , Guang Yao , Wennan Ma , Lin Xu

Realistic shadow generation is crucial for achieving seamless image compositing, yet existing methods primarily focus on single-object insertion and often fail to generalize when multiple foreground objects are composited into a background…

Computer Vision and Pattern Recognition · Computer Science 2026-03-06 Waqas Ahmed , Dean Diepeveen , Ferdous Sohel

Image restoration (IR) aims to recover clean images from degraded observations. Despite remarkable progress, most existing methods focus on a single degradation type, whereas real-world images often suffer from multiple coexisting…

Computer Vision and Pattern Recognition · Computer Science 2025-11-10 Hu Gao , Xiaoning Lei , Ying Zhang , Xichen Xu , Guannan Jiang , Lizhuang Ma

Segment Anything (SAM), an advanced universal image segmentation model trained on an expansive visual dataset, has set a new benchmark in image segmentation and computer vision. However, it faced challenges when it came to distinguishing…

Computer Vision and Pattern Recognition · Computer Science 2025-08-27 Xiao Feng Zhang , Tian Yi Song , Jia Wei Yao

Estimating the heightmaps of buildings and vegetation in single remotely sensed images is a challenging problem. Effective solutions to this problem can comprise the stepping stone for solving complex and demanding problems that require 3D…

Computer Vision and Pattern Recognition · Computer Science 2021-04-23 Savvas Karatsiolis , Andreas Kamilaris

This work proposes a new method to sequentially train deep neural networks on multiple tasks without suffering catastrophic forgetting, while endowing it with the capability to quickly adapt to unseen tasks. Starting from existing work on…

Computer Vision and Pattern Recognition · Computer Science 2023-02-02 Dhrupad Bhardwaj , Julia Kempe , Artem Vysogorets , Angela M. Teng , Evaristus C. Ezekwem

This paper presents a new regularization method to train a fully convolutional network for semantic tissue segmentation in histopathological images. This method relies on the benefit of unsupervised learning, in the form of image…

Computer Vision and Pattern Recognition · Computer Science 2020-11-26 C. T. Sari , C. Sokmensuer , C. Gunduz-Demir

One-shot segmentation of brain tissues is typically a dual-model iterative learning: a registration model (reg-model) warps a carefully-labeled atlas onto unlabeled images to initialize their pseudo masks for training a segmentation model…

Computer Vision and Pattern Recognition · Computer Science 2022-12-01 Jinxin Lv , Xiaoyu Zeng , Sheng Wang , Ran Duan , Zhiwei Wang , Qiang Li

Depth acquisition, based on active illumination, is essential for autonomous and robotic navigation. LiDARs (Light Detection And Ranging) with mechanical, fixed, sampling templates are commonly used in today's autonomous vehicles. An…

Computer Vision and Pattern Recognition · Computer Science 2019-08-06 Adam Wolff , Shachar Praisler , Ilya Tcenov , Guy Gilboa

Enhancing low-light traffic images is crucial for reliable perception in autonomous driving, intelligent transportation, and urban surveillance systems. Nighttime and dimly lit traffic scenes often suffer from poor visibility due to low…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Siddiqua Namrah

A deep learning-assisted inversion method is proposed to solve the inhomogeneous background imaging problem. Three non-iterative methods, namely the distorted-Born (DB) major current coefficients method, the DB modified Born approximation…

Applied Physics · Physics 2023-12-12 Naike Du , Tiantian Yin , Jing Wang , Rencheng Song , Kuiwen Xu , Bingyuan Liang , Sheng Sun , Xiuzhu Ye
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