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Photos of faces captured in unconstrained environments, such as large crowds, still constitute challenges for current face recognition approaches as often faces are occluded by objects or people in the foreground. However, few studies have…

Computer Vision and Pattern Recognition · Computer Science 2021-06-15 Stefan Hörmann , Zeyuan Zhang , Martin Knoche , Torben Teepe , Gerhard Rigoll

Recognizing the expressions of partially occluded faces is a challenging computer vision problem. Previous expression recognition methods, either overlooked this issue or resolved it using extreme assumptions. Motivated by the fact that the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-14 Hui Ding , Peng Zhou , Rama Chellappa

In this paper, we present an approach based on convolutional neural networks (CNNs) for facial expression recognition in a difficult setting with severe occlusions. More specifically, our task is to recognize the facial expression of a…

Computer Vision and Pattern Recognition · Computer Science 2019-11-13 Mariana-Iuliana Georgescu , Radu Tudor Ionescu

We exploit the mathematical modeling of the border completion problem in the visual cortex to design convolutional neural network (CNN) filters that enhance robustness to image occlusions. We evaluate our CNN architecture, BorderNet, on…

Computer Vision and Pattern Recognition · Computer Science 2026-03-12 Catarina P. Coutinho , Aneeqa Merhab , Janko Petkovic , Ferdinando Zanchetta , Rita Fioresi

Blind Face Restoration (BFR) aims to recover high-quality face images from low-quality ones and usually resorts to facial priors for improving restoration performance. However, current methods still suffer from two major difficulties: 1)…

Computer Vision and Pattern Recognition · Computer Science 2023-12-11 Yanjiang Yu , Puyang Zhang , Kaihao Zhang , Wenhan Luo , Changsheng Li , Ye Yuan , Guoren Wang

Image classification models, including convolutional neural networks (CNNs), perform well on a variety of classification tasks but struggle under conditions of partial occlusion, i.e., conditions in which objects are partially covered from…

Computer Vision and Pattern Recognition · Computer Science 2024-09-18 Kaleb Kassaw , Francesco Luzi , Leslie M. Collins , Jordan M. Malof

Occluded person re-identification (Re-ID) in images captured by multiple cameras is challenging because the target person is occluded by pedestrians or objects, especially in crowded scenes. In addition to the processes performed during…

Computer Vision and Pattern Recognition · Computer Science 2022-12-12 Minjung Kim , MyeongAh Cho , Heansung Lee , Suhwan Cho , Sangyoun Lee

Occluded person re-identification aims to retrieve holistic images based on occluded ones. Existing methods often rely on aligning visible body parts, applying occlusion augmentation, or complementing missing semantics using holistic…

Computer Vision and Pattern Recognition · Computer Science 2025-07-14 Yufei Zheng , Wenjun Wang , Wenjun Gan , Jiawei Liu

With the recent advancement of deep convolutional neural networks, significant progress has been made in general face recognition. However, the state-of-the-art general face recognition models do not generalize well to occluded face images,…

Computer Vision and Pattern Recognition · Computer Science 2022-08-09 Haibo Qiu , Dihong Gong , Zhifeng Li , Wei Liu , Dacheng Tao

This paper studies the problem of blind face restoration from an unconstrained blurry, noisy, low-resolution, or compressed image (i.e., degraded observation). For better recovery of fine facial details, we modify the problem setting by…

Computer Vision and Pattern Recognition · Computer Science 2018-04-17 Xiaoming Li , Ming Liu , Yuting Ye , Wangmeng Zuo , Liang Lin , Ruigang Yang

With the goal of recovering high-quality image content from its degraded version, image restoration enjoys numerous applications, such as in surveillance, computational photography, medical imaging, and remote sensing. Recently,…

Computer Vision and Pattern Recognition · Computer Science 2020-07-09 Syed Waqas Zamir , Aditya Arora , Salman Khan , Munawar Hayat , Fahad Shahbaz Khan , Ming-Hsuan Yang , Ling Shao

Deep neural networks (DNNs) have shown very promising results for various image restoration (IR) tasks. However, the design of network architectures remains a major challenging for achieving further improvements. While most existing…

Computer Vision and Pattern Recognition · Computer Science 2020-10-28 Weisheng Dong , Peiyao Wang , Wotao Yin , Guangming Shi , Fangfang Wu , Xiaotong Lu

Most of the face hallucination methods are designed for complete inputs. They will not work well if the inputs are very tiny or contaminated by large occlusion. Inspired by this fact, we propose an obscured face hallucination…

Computer Vision and Pattern Recognition · Computer Science 2018-12-13 Lianping Yang , Bin Shao , Ting Sun , Song Ding , Xiangde Zhang

Occlusions of objects is one of the indispensable problems in Computer vision. While Convolutional Neural Net-works (CNNs) provide various state of the art approaches for regular image classification, they however, prove to be not as…

Computer Vision and Pattern Recognition · Computer Science 2023-04-26 Karthick Prasad Gunasekaran , Nikita Jaiman

Detection of partially occluded objects is a challenging computer vision problem. Standard Convolutional Neural Network (CNN) detectors fail if parts of the detection window are occluded, since not every sub-part of the window is…

Computer Vision and Pattern Recognition · Computer Science 2016-09-02 Michael Opitz , Georg Waltner , Georg Poier , Horst Possegger , Horst Bischof

Deep Convolutional Neural Networks (CNNs) have been pushing the frontier of the face recognition research in the past years. However, existing general CNN face models generalize poorly to the scenario of occlusions on variable facial areas.…

Computer Vision and Pattern Recognition · Computer Science 2019-08-20 Lingxue Song , Dihong Gong , Zhifeng Li , Changsong Liu , Wei Liu

The presence of occlusions has provided substantial challenges to typically-powerful object recognition algorithms. Additional sources of information can be extremely valuable to reduce errors caused by occlusions. Scene context is known to…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Courtney M. King , Daniel D. Leeds , Damian Lyons , George Kalaitzis

Natural scene understanding is a challenging task, particularly when encountering images of multiple objects that are partially occluded. This obstacle is given rise by varying object ordering and positioning. Existing scene understanding…

Computer Vision and Pattern Recognition · Computer Science 2020-04-07 Xiaohang Zhan , Xingang Pan , Bo Dai , Ziwei Liu , Dahua Lin , Chen Change Loy

Due to the difficulty in acquiring massive task-specific occluded images, the classification of occluded images with deep convolutional neural networks (CNNs) remains highly challenging. To alleviate the dependency on large-scale occluded…

Computer Vision and Pattern Recognition · Computer Science 2020-11-03 Feng Cen , Xiaoyu Zhao , Wuzhuang Li , Guanghui Wang

Occluded person re-identification (ReID) is a person retrieval task which aims at matching occluded person images with holistic ones. For addressing occluded ReID, part-based methods have been shown beneficial as they offer fine-grained…

Computer Vision and Pattern Recognition · Computer Science 2024-07-26 Vladimir Somers , Christophe De Vleeschouwer , Alexandre Alahi
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