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We have developed convolutional neural networks (CNN) for a facial expression recognition task. The goal is to classify each facial image into one of the seven facial emotion categories considered in this study. We trained CNN models with…

Computer Vision and Pattern Recognition · Computer Science 2017-04-25 Shima Alizadeh , Azar Fazel

Session-based recommendation (SBR) aims to predict the next item at a certain time point based on anonymous user behavior sequences. Existing methods typically model session representation based on simple item transition information.…

Information Retrieval · Computer Science 2023-11-07 Fuyun Wang , Xingyu Gao , Zhenyu Chen , Lei Lyu

Age-related macular degeneration (AMD) is the most common cause of blindness in developed countries, especially in people over 60 years of age. The workload of specialists and the healthcare system in this field has increased in recent…

Image and Video Processing · Electrical Eng. & Systems 2022-02-07 Saman Sotoudeh-Paima , Ata Jodeiri , Fedra Hajizadeh , Hamid Soltanian-Zadeh

Cross-modality image estimation involves the generation of images of one medical imaging modality from that of another modality. Convolutional neural networks (CNNs) have been shown to be useful in identifying, characterising and extracting…

Image and Video Processing · Electrical Eng. & Systems 2021-06-07 Azin Shokraei Fard , David C. Reutens , Viktor Vegh

In this work, we address the face parsing task with a Fully-Convolutional continuous CRF Neural Network (FC-CNN) architecture. In contrast to previous face parsing methods that apply region-based subnetwork hundreds of times, our FC-CNN is…

Computer Vision and Pattern Recognition · Computer Science 2017-08-15 Lei Zhou , Zhi Liu , Xiangjian He

Recently, Graph Convolutional Networks (GCNs) have proven to be a powerful mean for Computer Aided Diagnosis (CADx). This approach requires building a population graph to aggregate structural information, where the graph adjacency matrix…

Artificial Intelligence · Computer Science 2021-06-17 Hao Chen , Fuzhen Zhuang , Li Xiao , Ling Ma , Haiyan Liu , Ruifang Zhang , Huiqin Jiang , Qing He

We present a baseline convolutional neural network (CNN) structure and image preprocessing methodology to improve facial expression recognition algorithm using CNN. To analyze the most efficient network structure, we investigated four…

Computer Vision and Pattern Recognition · Computer Science 2016-11-15 Minchul Shin , Munsang Kim , Dong-Soo Kwon

Age synthesis is a challenging task due to the complicated and non-linear transformation in human aging process. Aging information is usually reflected in local facial parts, such as wrinkles at the eye corners. However, these local facial…

Computer Vision and Pattern Recognition · Computer Science 2019-04-02 Peipei Li , Yibo Hu , Ran He , Zhenan Sun

The human face contains important and understandable information such as personal identity, gender, age, and ethnicity. In recent years, a person's age has been studied as one of the important features of the face. The age estimation system…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Mahtab Taheri , Mahdi Taheri , Amirhossein Hadjahmadi

Face identification/recognition has significantly advanced over the past years. However, most of the proposed approaches rely on static RGB frames and on neutral facial expressions. This has two disadvantages. First, important facial shape…

Computer Vision and Pattern Recognition · Computer Science 2021-04-21 Konstantinos Papadopoulos , Anis Kacem , Abdelrahman Shabayek , Djamila Aouada

In medical time series disease diagnosis, two key challenges are identified.First, the high annotation cost of medical data leads to overfitting in models trained on label-limited, single-center datasets. To address this, we propose…

Machine Learning · Computer Science 2025-01-31 Yifan Wang , Hongfeng Ai , Ruiqi Li , Maowei Jiang , Cheng Jiang , Chenzhong Li

Gaze estimation methods commonly use facial appearances to predict the direction of a person gaze. However, previous studies show three major challenges with convolutional neural network (CNN)-based, transformer-based, and contrastive…

Computer Vision and Pattern Recognition · Computer Science 2026-05-04 Xinyuan Zhao , Yihang Wu , Ahmad Chaddad , Sarah A. Alkhodair , Reem Kateb

Dynamic facial expression recognition (DFER) faces significant challenges due to long-tailed category distributions and complexity of spatio-temporal feature modeling. While existing deep learning-based methods have improved DFER…

Computer Vision and Pattern Recognition · Computer Science 2026-01-05 Feng-Qi Cui , Zhen Lin , Xinlong Rao , Anyang Tong , Shiyao Li , Fei Wang , Changlin Chen , Bin Liu

This paper proposes a scalable and straightforward pre-training paradigm for efficient visual conceptual representation called occluded image contrastive learning (OCL). Our OCL approach is simple: we randomly mask patches to generate…

Computer Vision and Pattern Recognition · Computer Science 2025-02-17 Xiaoyu Yang , Lijian Xu , Hongsheng Li , Shaoting Zhang

Graph Convolutional Network (GCN) has exhibited remarkable potential in improving graph-based clustering. To handle the general clustering scenario without a prior graph, these models estimate an initial graph beforehand to apply GCN.…

Machine Learning · Computer Science 2024-04-04 Mulin Chen , Bocheng Wang , Xuelong Li

In this paper, we aim to address the problem of heterogeneous or cross-spectral face recognition using machine learning to synthesize visual spectrum face from infrared images. The synthesis of visual-band face images allows for more…

Computer Vision and Pattern Recognition · Computer Science 2020-07-24 Kenneth Lai , Svetlana N. Yanushkevich

Facial Expression Recognition (FER) is vital for understanding interpersonal communication. However, existing classification methods often face challenges such as vulnerability to noise, imbalanced datasets, overfitting, and generalization…

Computer Vision and Pattern Recognition · Computer Science 2024-07-03 Hozaifa Kassab , Mohamed Bahaa , Ali Hamdi

Improving sample efficiency is a key research problem in reinforcement learning (RL), and CURL, which uses contrastive learning to extract high-level features from raw pixels of individual video frames, is an efficient…

Machine Learning · Computer Science 2020-10-16 Jinhua Zhu , Yingce Xia , Lijun Wu , Jiajun Deng , Wengang Zhou , Tao Qin , Houqiang Li

Contrastive learning has shown great potential in video representation learning. However, existing approaches fail to sufficiently exploit short-term motion dynamics, which are crucial to various down-stream video understanding tasks. In…

Computer Vision and Pattern Recognition · Computer Science 2022-08-15 Jingcheng Ni , Nan Zhou , Jie Qin , Qian Wu , Junqi Liu , Boxun Li , Di Huang

We tackle open-world semantic segmentation, which aims at learning to segment arbitrary visual concepts in images, by using only image-text pairs without dense annotations. Existing open-world segmentation methods have shown impressive…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Junbum Cha , Jonghwan Mun , Byungseok Roh
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