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One-Class Classification (OCC) is a special case of multi-class classification, where data observed during training is from a single positive class. The goal of OCC is to learn a representation and/or a classifier that enables recognition…

计算机视觉与模式识别 · 计算机科学 2021-01-11 Pramuditha Perera , Poojan Oza , Vishal M. Patel

Nearly all existing counting methods are designed for a specific object class. Our work, however, aims to create a counting model able to count any class of object. To achieve this goal, we formulate counting as a matching problem, enabling…

计算机视觉与模式识别 · 计算机科学 2018-11-02 Erika Lu , Weidi Xie , Andrew Zisserman

Object detection models perform well at localizing and classifying objects that they are shown during training. However, due to the difficulty and cost associated with creating and annotating detection datasets, trained models detect a…

计算机视觉与模式识别 · 计算机科学 2020-12-01 Ayush Jaiswal , Yue Wu , Pradeep Natarajan , Premkumar Natarajan

Language-Guided object recognition in remote sensing imagery is crucial for large-scale mapping and automated data annotation. However, existing open-vocabulary and visual grounding methods rely on explicit category cues, limiting their…

计算机视觉与模式识别 · 计算机科学 2025-10-14 Yijie Zheng , Weijie Wu , Qingyun Li , Xuehui Wang , Xu Zhou , Aiai Ren , Jun Shen , Long Zhao , Guoqing Li , Xue Yang

Object counting has achieved remarkable success on visible instances, yet state-of-the-art (SOTA) methods fail under occlusion. This failure stems from a fundamental architectural limitation where backbone networks encode occluding surfaces…

计算机视觉与模式识别 · 计算机科学 2026-03-10 Safaeid Hossain Arib , Rabeya Akter , Abdul Monaf Chowdhury , Md Jubair Ahmed Sourov , Md Mehedi Hasan

Class-agnostic counting (CAC) methods reduce annotation costs by letting users define what to count at test-time through text or visual exemplars. However, current open-vocabulary approaches work well for broad categories but fail when…

计算机视觉与模式识别 · 计算机科学 2025-12-24 Adriano D'Alessandro , Ali Mahdavi-Amiri , Ghassan Hamarneh

Open-world text-guided class-agnostic counting (CAC) has emerged as a flexible paradigm for counting arbitrary object classes by using natural language prompts. However, current evaluation protocols primarily focus on standard counting…

计算机视觉与模式识别 · 计算机科学 2026-05-14 Giacomo Pacini , Luca Ciampi , Nicola Messina , Nicola Tonellotto , Giuseppe Amato , Fabrizio Falchi

Object detection methods have witnessed impressive improvements in the last years thanks to the design of novel neural network architectures and the availability of large scale datasets. However, current methods have a significant…

计算机视觉与模式识别 · 计算机科学 2022-08-25 Dario Fontanel , Matteo Tarantino , Fabio Cermelli , Barbara Caputo

Classification tasks play a fundamental role in various applications, spanning domains such as healthcare, natural language processing and computer vision. With the growing popularity and capacity of machine learning models, people can…

计算机视觉与模式识别 · 计算机科学 2025-02-26 Dujian Ding , Bicheng Xu , Laks V. S. Lakshmanan

Object counting methods typically rely on manually annotated datasets. The cost of creating such datasets has restricted the versatility of these networks to count objects from specific classes (such as humans or penguins), and counting…

计算机视觉与模式识别 · 计算机科学 2024-08-05 Adriano D'Alessandro , Ali Mahdavi-Amiri , Ghassan Hamarneh

Zero-shot object counting (ZOC) aims to enumerate objects in images using only the names of object classes during testing, without the need for manual annotations. However, a critical challenge in current ZOC methods lies in their inability…

计算机视觉与模式识别 · 计算机科学 2024-07-10 Huilin Zhu , Jingling Yuan , Zhengwei Yang , Yu Guo , Zheng Wang , Xian Zhong , Shengfeng He

Class-agnostic counting (CAC) aims to count all instances in a query image given few exemplars. A standard pipeline is to extract visual features from exemplars and match them with query images to infer object counts. Two essential…

计算机视觉与模式识别 · 计算机科学 2022-03-17 Min Shi , Hao Lu , Chen Feng , Chengxin Liu , Zhiguo Cao

Object detection requires substantial labeling effort for learning robust models. Active learning can reduce this effort by intelligently selecting relevant examples to be annotated. However, selecting these examples properly without…

机器学习 · 计算机科学 2022-12-09 Dominik Probst , Hasnain Raza , Erik Rodner

Class-agnostic image segmentation is a crucial component in automating image editing workflows, especially in contexts where object selection traditionally involves interactive tools. Existing methods in the literature often adhere to…

计算机视觉与模式识别 · 计算机科学 2024-09-23 Sebastian Dille , Ari Blondal , Sylvain Paris , Yağız Aksoy

The counting task, which plays a fundamental role in numerous applications (e.g., crowd counting, traffic statistics), aims to predict the number of objects with various densities. Existing object counting tasks are designed for a single…

计算机视觉与模式识别 · 计算机科学 2023-07-03 Shengqin Jiang , Qing Wang , Fengna Cheng , Yuankai Qi , Qingshan Liu

Our objective is open-world object counting in images, where the target object class is specified by a text description. To this end, we propose CounTX, a class-agnostic, single-stage model using a transformer decoder counting head on top…

计算机视觉与模式识别 · 计算机科学 2023-09-19 Niki Amini-Naieni , Kiana Amini-Naieni , Tengda Han , Andrew Zisserman

One-class classification (OCC), i.e., identifying whether an example belongs to the same distribution as the training data, is essential for deploying machine learning models in the real world. Adapting the pre-trained features on the…

计算机视觉与模式识别 · 计算机科学 2023-09-06 Zilong Zhang , Zhibin Zhao , Deyu Meng , Xingwu Zhang , Xuefeng Chen

This paper proposes to go beyond the state-of-the-art deep convolutional neural network (CNN) by incorporating the information from object detection, focusing on dealing with fine-grained image classification. Unfortunately, CNN suffers…

计算机视觉与模式识别 · 计算机科学 2014-12-11 Xiaoyu Wang , Tianbao Yang , Guobin Chen , Yuanqing Lin

Recently, Class-Agnostic Counting (CAC) problem has garnered increasing attention owing to its intriguing generality and superior efficiency compared to Category-Specific Counting (CSC). This paper proposes a novel ExpressCount to enhance…

计算机视觉与模式识别 · 计算机科学 2024-02-09 Mingjie Wang , Jun Zhou , Yong Dai , Eric Buys , Minglun Gong

One-class classification (OCC), which models one single positive class and distinguishes it from the negative class, has been a long-standing topic with pivotal application to realms like anomaly detection. As modern society often deals…

计算机视觉与模式识别 · 计算机科学 2021-04-28 Siqi Wang , Jiyuan Liu , Guang Yu , Xinwang Liu , Sihang Zhou , En Zhu , Yuexiang Yang , Jianping Yin