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The softmax-based loss functions and its variants (e.g., cosface, sphereface, and arcface) significantly improve the face recognition performance in wild unconstrained scenes. A common practice of these algorithms is to perform…

Computer Vision and Pattern Recognition · Computer Science 2022-08-25 Hongwei Xu , Suncheng Xiang , Dahong Qian

Detecting and masking cloud and cloud shadow from satellite remote sensing images is a pervasive problem in the remote sensing community. Accurate and efficient detection of cloud and cloud shadow is an essential step to harness the value…

Computer Vision and Pattern Recognition · Computer Science 2019-11-12 Ke Xu , Kaiyu Guan , Jian Peng , Yunan Luo , Sibo Wang

Data collection in robotics is spread across diverse hardware, and this variation will increase as new hardware is developed. Effective use of this growing body of data requires methods capable of learning from diverse robot embodiments. We…

Robotics · Computer Science 2025-03-04 Marion Lepert , Ria Doshi , Jeannette Bohg

We present a fully automatic method to generate detailed and accurate artistic shadows from pairs of line drawing sketches and lighting directions. We also contribute a new dataset of one thousand examples of pairs of line drawings and…

Computer Vision and Pattern Recognition · Computer Science 2020-04-06 Qingyuan Zheng , Zhuoru Li , Adam Bargteil

Masked image modeling is a promising self-supervised learning method for visual data. It is typically built upon image patches with random masks, which largely ignores the variation of information density between them. The question is: Is…

Computer Vision and Pattern Recognition · Computer Science 2024-01-09 Haijian Chen , Wendong Zhang , Yunbo Wang , Xiaokang Yang

Blur detection aims at segmenting the blurred areas of a given image. Recent deep learning-based methods approach this problem by learning an end-to-end mapping between the blurred input and a binary mask representing the localization of…

Computer Vision and Pattern Recognition · Computer Science 2019-08-29 Aitor Alvarez-Gila , Adrian Galdran , Estibaliz Garrote , Joost van de Weijer

Generating realistic cast shadows for inserted foreground objects is a crucial yet challenging problem in image composition, where maintaining geometric consistency of shadow and object in complex scenes remains difficult due to the…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Jing Li , Jing Zhang

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

Image smoothing is a fundamental task in computer vision, that aims to retain salient structures and remove insignificant textures. In this paper, we aim to address the fundamental shortcomings of existing image smoothing methods, which…

Computer Vision and Pattern Recognition · Computer Science 2018-05-09 Kaiyue Lu , Shaodi You , Nick Barnes

Existing shadow removal methods often rely on shadow masks, which are challenging to acquire in real-world scenarios. Exploring intrinsic image cues, such as local contrast information, presents a potential alternative for guiding shadow…

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

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

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 art is a captivating form of sculptural expression where the projection of a sculpture in a specific direction reveals a desired shape with high precision. In this work, we introduce Neural Shadow Art, which leverages implicit…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Caoliwen Wang , Bailin Deng , Juyong Zhang

Relying on either deep models or physical models are two mainstream approaches for solving inverse sample reconstruction problems in programmable illumination computational microscopy. Solutions based on physical models possess strong…

Image and Video Processing · Electrical Eng. & Systems 2024-03-21 Ruiqing Sun , Delong Yang , Shaohui Zhang , Qun Hao

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

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

This paper proposes a novel self-supervised learning method for semantic segmentation using selective masking image reconstruction as the pretraining task. Our proposed method replaces the random masking augmentation used in most masked…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Yuemin Wang , Ian Stavness

Diffusion models have demonstrated strong potential in language modeling, offering various advantages over traditional autoregressive approaches. Their ability to generate and revise entire responses in parallel enables faster generation…

Machine Learning · Computer Science 2026-03-03 Michael Hersche , Samuel Moor-Smith , Thomas Hofmann , Abbas Rahimi

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…

Computer Vision and Pattern Recognition · Computer Science 2024-12-20 Jinting Luo , Ru Li , Chengzhi Jiang , Xiaoming Zhang , Mingyan Han , Ting Jiang , Haoqiang Fan , Shuaicheng Liu

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