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Recognition of low resolution face images is a challenging problem in many practical face recognition systems. Methods have been proposed in the face recognition literature for the problem which assume that the probe is low resolution, but…

计算机视觉与模式识别 · 计算机科学 2017-07-11 Sumit Shekhar , Vishal M. Patel , Rama Chellappa

Handwritten character recognition (HCR) is a challenging problem for machine learning researchers. Unlike printed text data, handwritten character datasets have more variation due to human-introduced bias. With numerous unique character…

计算机视觉与模式识别 · 计算机科学 2024-03-28 Boris Kriuk , Fedor Kriuk

Recently, great success has been achieved in offline handwritten Chinese character recognition by using deep learning methods. Chinese characters are mainly logographic and consist of basic radicals, however, previous research mostly…

计算机视觉与模式识别 · 计算机科学 2018-08-14 Wenchao Wang , Jianshu Zhang , Jun Du , Zi-Rui Wang , Yixing Zhu

This paper considers deep visual recognition on long-tailed data. To be general, we consider two applied scenarios, \ie, deep classification and deep metric learning. Under the long-tailed data distribution, the majority classes (\ie, tail…

计算机视觉与模式识别 · 计算机科学 2021-07-07 Jialun Liu , Jingwei Zhang , Yi yang , Wenhui Li , Chi Zhang , Yifan Sun

Recognizing unseen fine-grained categories demands a model that can distinguish subtle visual differences. This is typically achieved by transferring visual-attribute relationships from seen classes to unseen classes. The core challenge is…

计算机视觉与模式识别 · 计算机科学 2025-12-16 Zhi Chen , Jingcai Guo , Taotao Cai , Yuxiang Cai

Real world data often exhibits a long-tailed and open-ended (with unseen classes) distribution. A practical recognition system must balance between majority (head) and minority (tail) classes, generalize across the distribution, and…

计算机视觉与模式识别 · 计算机科学 2022-08-18 Ziwei Liu , Zhongqi Miao , Xiaohang Zhan , Jiayun Wang , Boqing Gong , Stella X. Yu

Real-world data is predominantly unbalanced and long-tailed, but deep models struggle to recognize rare classes in the presence of frequent classes. Often, classes can be accompanied by side information like textual descriptions, but it is…

机器学习 · 计算机科学 2020-11-05 Dvir Samuel , Yuval Atzmon , Gal Chechik

Automated road sign recognition is a critical task for intelligent transportation systems, but traditional deep learning methods struggle with the sheer number of sign classes and the impracticality of creating exhaustive labeled datasets.…

计算机视觉与模式识别 · 计算机科学 2025-12-16 Minghao Zhu , Zhihao Zhang , Anmol Sidhu , Keith Redmill

Learning visual representations is foundational for a broad spectrum of downstream tasks. Although recent vision-language contrastive models, such as CLIP and SigLIP, have achieved impressive zero-shot performance via large-scale…

计算机视觉与模式识别 · 计算机科学 2025-07-29 Yin Xie , Kaicheng Yang , Xiang An , Kun Wu , Yongle Zhao , Weimo Deng , Zimin Ran , Yumeng Wang , Ziyong Feng , Roy Miles , Ismail Elezi , Jiankang Deng

Vision-language models (VLMs) excel in zero-shot recognition but their performance varies greatly across different visual concepts. For example, although CLIP achieves impressive accuracy on ImageNet (60-80%), its performance drops below…

计算机视觉与模式识别 · 计算机科学 2024-05-24 Shubham Parashar , Zhiqiu Lin , Tian Liu , Xiangjue Dong , Yanan Li , Deva Ramanan , James Caverlee , Shu Kong

We propose a generalized Sparse Representation- based Classification (SRC) algorithm for open set recognition where not all classes presented during testing are known during training. The SRC algorithm uses class reconstruction errors for…

计算机视觉与模式识别 · 计算机科学 2017-05-09 He Zhang , Vishal M. Patel

Zero-shot composed image retrieval (ZS-CIR) is a rapidly growing area with significant practical applications, allowing users to retrieve a target image by providing a reference image and a relative caption describing the desired…

计算机视觉与模式识别 · 计算机科学 2026-01-21 Yongcong Ye , Kai Zhang , Yanghai Zhang , Enhong Chen , Longfei Li , Jun Zhou

We propose a zero-shot learning relation classification (ZSLRC) framework that improves on state-of-the-art by its ability to recognize novel relations that were not present in training data. The zero-shot learning approach mimics the way…

计算与语言 · 计算机科学 2021-11-22 Jiaying Gong , Hoda Eldardiry

Long-tailed classification is challenging due to its heavy imbalance in class probabilities. While existing methods often focus on overall accuracy or accuracy for tail classes, they overlook a critical aspect: certain types of errors can…

机器学习 · 计算机科学 2025-01-27 Bolian Li , Ruqi Zhang

Composed Image Retrieval (CIR) aims to retrieve target images that closely resemble a reference image while integrating user-specified textual modifications, thereby capturing user intent more precisely. Existing training-free zero-shot CIR…

计算机视觉与模式识别 · 计算机科学 2024-12-23 Yuanmin Tang , Xiaoting Qin , Jue Zhang , Jing Yu , Gaopeng Gou , Gang Xiong , Qingwei Ling , Saravan Rajmohan , Dongmei Zhang , Qi Wu

Recent methods for single image super-resolution (SISR) have demonstrated outstanding performance in generating high-resolution (HR) images from low-resolution (LR) images. However, most of these methods show their superiority using…

计算机视觉与模式识别 · 计算机科学 2022-08-25 Jun-Sang Yoo , Dong-Wook Kim , Yucheng Lu , Seung-Won Jung

Camera traps are a method for monitoring wildlife and they collect a large number of pictures. The number of images collected of each species usually follows a long-tail distribution, i.e., a few classes have a large number of instances,…

计算机视觉与模式识别 · 计算机科学 2023-03-15 Fagner Cunha , Eulanda M. dos Santos , Juan G. Colonna

Real world data often have a long-tailed and open-ended distribution. A practical recognition system must classify among majority and minority classes, generalize from a few known instances, and acknowledge novelty upon a never seen…

计算机视觉与模式识别 · 计算机科学 2019-04-17 Ziwei Liu , Zhongqi Miao , Xiaohang Zhan , Jiayun Wang , Boqing Gong , Stella X. Yu

Real-world datasets often exhibit long-tailed distributions, where a few dominant "Head" classes have abundant samples while most "Tail" classes are severely underrepresented, leading to biased learning and poor generalization for the Tail.…

机器学习 · 计算机科学 2026-02-02 Mahdiyar Molahasani , Michael Greenspan , Ali Etemad

Zero-shot learning (ZSL) aims to recognize instances of unseen classes solely based on the semantic descriptions of the classes. Existing algorithms usually formulate it as a semantic-visual correspondence problem, by learning mappings from…

计算机视觉与模式识别 · 计算机科学 2019-11-28 Kai Li , Martin Renqiang Min , Yun Fu