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Fine-grained visual classification (FGVC) requires distinguishing between visually similar categories through subtle, localized features - a task that remains challenging due to high intra-class variability and limited inter-class…

Computer Vision and Pattern Recognition · Computer Science 2025-09-22 Johann Schmidt , Sebastian Stober , Joachim Denzler , Paul Bodesheim

Fine-grained visual classification (FGVC) is challenging but more critical than traditional classification tasks. It requires distinguishing different subcategories with the inherently subtle intra-class object variations. Previous works…

Computer Vision and Pattern Recognition · Computer Science 2021-03-10 Zhenhuan Huang , Xiaoyue Duan , Bo Zhao , Jinhu Lü , Baochang Zhang

Transferring the knowledge learned from large scale datasets (e.g., ImageNet) via fine-tuning offers an effective solution for domain-specific fine-grained visual categorization (FGVC) tasks (e.g., recognizing bird species or car make and…

Computer Vision and Pattern Recognition · Computer Science 2018-06-19 Yin Cui , Yang Song , Chen Sun , Andrew Howard , Serge Belongie

Exemplar learning of visual similarities in an unsupervised manner is a problem of paramount importance to Computer Vision. In this context, however, the recent breakthrough in deep learning could not yet unfold its full potential. With…

Computer Vision and Pattern Recognition · Computer Science 2018-02-26 Artsiom Sanakoyeu , Miguel A. Bautista , Björn Ommer

Generic object detection is one of the most fundamental problems in computer vision, yet it is difficult to provide all the bounding-box-level annotations aiming at large-scale object detection for thousands of categories. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2020-01-16 Ye Guo , Yali Li , Shengjin Wang

Unsupervised person re-identification (ReID) aims at learning discriminative identity features without annotations. Recently, self-supervised contrastive learning has gained increasing attention for its effectiveness in unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2021-08-19 Hao Chen , Benoit Lagadec , Francois Bremond

Unsupervised visible-infrared person re-identification (USVI-ReID) aims to match specified people in infrared images to visible images without annotations, and vice versa. USVI-ReID is a challenging yet under-explored task. Most existing…

Computer Vision and Pattern Recognition · Computer Science 2024-10-25 Jiangming Shi , Xiangbo Yin , Yachao Zhang , Zhizhong Zhang , Yuan Xie , Yanyun Qu

Although deep learning are commonly employed for image recognition, usually huge amount of labeled training data is required, which may not always be readily available. This leads to a noticeable performance disparity when compared to…

Computer Vision and Pattern Recognition · Computer Science 2024-02-08 Enoch Solomon , Abraham Woubie , Eyael Solomon Emiru

Clustering is a class of unsupervised learning methods that has been extensively applied and studied in computer vision. Little work has been done to adapt it to the end-to-end training of visual features on large scale datasets. In this…

Computer Vision and Pattern Recognition · Computer Science 2019-03-19 Mathilde Caron , Piotr Bojanowski , Armand Joulin , Matthijs Douze

Neural net classifiers trained on data with annotated class labels can also capture apparent visual similarity among categories without being directed to do so. We study whether this observation can be extended beyond the conventional…

Computer Vision and Pattern Recognition · Computer Science 2018-05-08 Zhirong Wu , Yuanjun Xiong , Stella Yu , Dahua Lin

Fine-grained recognition is challenging due to its subtle local inter-class differences versus large intra-class variations such as poses. A key to address this problem is to localize discriminative parts to extract pose-invariant features.…

Computer Vision and Pattern Recognition · Computer Science 2017-03-22 Xiao Liu , Tian Xia , Jiang Wang , Yi Yang , Feng Zhou , Yuanqing Lin

Unsupervised person re-identification is a challenging and promising task in computer vision. Nowadays unsupervised person re-identification methods have achieved great progress by training with pseudo labels. However, how to purify feature…

Computer Vision and Pattern Recognition · Computer Science 2023-06-28 Long Lan , Xiao Teng , Jing Zhang , Xiang Zhang , Dacheng Tao

FungiCLEF 2024 addresses the fine-grained visual categorization (FGVC) of fungi species, with a focus on identifying poisonous species. This task is challenging due to the size and class imbalance of the dataset, subtle inter-class…

Computer Vision and Pattern Recognition · Computer Science 2024-07-11 Christopher Chiu , Maximilian Heil , Teresa Kim , Anthony Miyaguchi

Unsupervised learning is a challenging task due to the lack of labels. Multiple Object Tracking (MOT), which inevitably suffers from mutual object interference, occlusion, etc., is even more difficult without label supervision. In this…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Sha Meng , Dian Shao , Jiacheng Guo , Shan Gao

Fine-grained visual classification (FGVC) is a challenging computer vision problem, where the task is to automatically recognise objects from subordinate categories. One of its main difficulties is capturing the most discriminative…

Computer Vision and Pattern Recognition · Computer Science 2024-01-03 Dmitry Demidov , Muhammad Hamza Sharif , Aliakbar Abdurahimov , Hisham Cholakkal , Fahad Shahbaz Khan

Image forgery detection aims to detect and locate forged regions in an image. Most existing forgery detection algorithms formulate classification problems to classify pixels into forged or pristine. However, the definition of forged and…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Haiwei Wu , Yiming Chen , Jiantao Zhou , Yuanman Li

Unsupervised person re-identification (re-ID) has become an important topic due to its potential to resolve the scalability problem of supervised re-ID models. However, existing methods simply utilize pseudo labels from clustering for…

Computer Vision and Pattern Recognition · Computer Science 2021-04-02 Junhui Yin , Jiayan Qiu , Siqing Zhang , Jiyang Xie , Zhanyu Ma , Jun Guo

Although unsupervised person re-identification (RE-ID) has drawn increasing research attentions due to its potential to address the scalability problem of supervised RE-ID models, it is very challenging to learn discriminative information…

Computer Vision and Pattern Recognition · Computer Science 2019-04-09 Hong-Xing Yu , Wei-Shi Zheng , Ancong Wu , Xiaowei Guo , Shaogang Gong , Jian-Huang Lai

Unsupervised visible-infrared person re-identification (UVI-ReID) has recently gained great attention due to its potential for enhancing human detection in diverse environments without labeling. Previous methods utilize intra-modality…

Computer Vision and Pattern Recognition · Computer Science 2024-04-11 Yexin Liu , Weiming Zhang , Athanasios V. Vasilakos , Lin Wang

Fine-Grained Visual Categorization (FGVC) has achieved significant progress recently. However, the number of fine-grained species could be huge and dynamically increasing in real scenarios, making it difficult to recognize unseen objects…

Computer Vision and Pattern Recognition · Computer Science 2017-07-05 Hantao Yao , Shiliang Zhang , Yongdong Zhang , Jintao Li , Qi Tian
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