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Fine-grained sketch-based image retrieval (FG-SBIR) addresses the problem of retrieving a particular photo instance given a user's query sketch. Its widespread applicability is however hindered by the fact that drawing a sketch takes time,…

Computer Vision and Pattern Recognition · Computer Science 2020-05-13 Ayan Kumar Bhunia , Yongxin Yang , Timothy M. Hospedales , Tao Xiang , Yi-Zhe Song

Zero-shot learning (ZSL) aims to recognize objects from unseen classes, where the kernel problem is to transfer knowledge from seen classes to unseen classes by establishing appropriate mappings between visual and semantic features. The…

Computer Vision and Pattern Recognition · Computer Science 2022-03-18 Bo Liu , Qiulei Dong , Zhanyi Hu

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…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Yongcong Ye , Kai Zhang , Yanghai Zhang , Enhong Chen , Longfei Li , Jun Zhou

Anomaly detection in images is typically addressed by learning from collections of training data or relying on reference samples. In many real-world scenarios, however, such training data may be unavailable, and only the test image itself…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Mehrdad Moradi , Shengzhe Chen , Hao Yan , Kamran Paynabar

We present an algorithm for searching image collections using free-hand sketches that describe the appearance and relative positions of multiple objects. Sketch based image retrieval (SBIR) methods predominantly match queries containing a…

Computer Vision and Pattern Recognition · Computer Science 2021-06-16 Alexander Black , Tu Bui , Long Mai , Hailin Jin , John Collomosse

The goal of Scene-level Sketch-Based Image Retrieval is to retrieve natural images matching the overall semantics and spatial layout of a free-hand sketch. Unlike prior work focused on architectural augmentations of retrieval models, we…

Computer Vision and Pattern Recognition · Computer Science 2025-09-09 Emil Demić , Luka Čehovin Zajc

In image recognition, there are many cases where training samples cannot cover all target classes. Zero-shot learning (ZSL) utilizes the class semantic information to classify samples of the unseen categories that have no corresponding…

Computer Vision and Pattern Recognition · Computer Science 2018-06-25 Fan Wu , Kai Tian , Jihong Guan , Shuigeng Zhou

The need to address the scarcity of task-specific annotated data has resulted in concerted efforts in recent years for specific settings such as zero-shot learning (ZSL) and domain generalization (DG), to separately address the issues of…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Shivam Chandhok , Sanath Narayan , Hisham Cholakkal , Rao Muhammad Anwer , Vineeth N Balasubramanian , Fahad Shahbaz Khan , Ling Shao

Conventional existing retrieval methods in remote sensing (RS) are often based on a uni-modal data retrieval framework. In this work, we propose a novel inter-modal triplet-based zero-shot retrieval scheme utilizing a sketch-based…

Computer Vision and Pattern Recognition · Computer Science 2021-04-22 Ushasi Chaudhuri , Biplab Banerjee , Avik Bhattacharya , Mihai Datcu

Sketch-based image retrieval, which aims to use sketches as queries to retrieve images containing the same query instance, receives increasing attention in recent years. Although dramatic progress has been made in sketch retrieval, few…

Computer Vision and Pattern Recognition · Computer Science 2023-04-06 Binbin Feng , Jun Li , Jianhua Xu

In this paper, we study learning semantic representations for million-scale free-hand sketches. This is highly challenging due to the domain-unique traits of sketches, e.g., diverse, sparse, abstract, noisy. We propose a dual-branch CNNRNN…

Computer Vision and Pattern Recognition · Computer Science 2020-07-09 Peng Xu , Yongye Huang , Tongtong Yuan , Tao Xiang , Timothy M. Hospedales , Yi-Zhe Song , Liang Wang

Sketch-based 3D shape retrieval is a challenging task due to the large domain discrepancy between sketches and 3D shapes. Since existing methods are trained and evaluated on the same categories, they cannot effectively recognize the…

Computer Vision and Pattern Recognition · Computer Science 2022-07-01 Rui Xu , Zongyan Han , Le Hui , Jianjun Qian , Jin Xie

Rising concerns about privacy and anonymity preservation of deep learning models have facilitated research in data-free learning (DFL). For the first time, we identify that for data-scarce tasks like Sketch-Based Image Retrieval (SBIR),…

Computer Vision and Pattern Recognition · Computer Science 2023-03-15 Abhra Chaudhuri , Ayan Kumar Bhunia , Yi-Zhe Song , Anjan Dutta

Zero-shot learning (ZSL) endeavors to transfer knowledge from seen categories to recognize unseen categories, which mostly relies on the semantic-visual interactions between image and attribute tokens. Recently, prompt learning has emerged…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Man Liu , Huihui Bai , Feng Li , Chunjie Zhang , Yunchao Wei , Tat-Seng Chua , Yao Zhao

The class-agnostic counting (CAC) problem has caught increasing attention recently due to its wide societal applications and arduous challenges. To count objects of different categories, existing approaches rely on user-provided exemplars,…

Computer Vision and Pattern Recognition · Computer Science 2023-02-13 Mingjie Wang , Yande Li , Jun Zhou , Graham W. Taylor , Minglun Gong

Despite the dominance of convolutional and transformer-based architectures in image-to-image retrieval, these models are prone to biases arising from low-level visual features, such as color. Recognizing the lack of semantic understanding…

Computer Vision and Pattern Recognition · Computer Science 2025-05-23 Nikolaos Chaidos , Angeliki Dimitriou , Maria Lymperaiou , Giorgos Stamou

Zero-shot learning has been actively studied for image classification task to relieve the burden of annotating image labels. Interestingly, semantic segmentation task requires more labor-intensive pixel-wise annotation, but zero-shot…

Computer Vision and Pattern Recognition · Computer Science 2022-01-24 Zhangxuan Gu , Siyuan Zhou , Li Niu , Zihan Zhao , Liqing Zhang

Fine-grained sketch-based image retrieval (FG-SBIR) addresses the problem of retrieving a particular photo in a given query sketch. However, its widespread applicability is limited by the fact that it is difficult to draw a complete sketch…

Computer Vision and Pattern Recognition · Computer Science 2022-01-14 Dawei Dai , Xiaoyu Tang , Shuyin Xia , Yingge Liu , Guoyin Wang , Zizhong Chen

Current Zero-Shot Learning (ZSL) approaches are restricted to recognition of a single dominant unseen object category in a test image. We hypothesize that this setting is ill-suited for real-world applications where unseen objects appear…

Computer Vision and Pattern Recognition · Computer Science 2019-04-12 Shafin Rahman , Salman Khan , Fatih Porikli

Sketch as an image search query is an ideal alternative to text in capturing the fine-grained visual details. Prior successes on fine-grained sketch-based image retrieval (FG-SBIR) have demonstrated the importance of tackling the unique…

Computer Vision and Pattern Recognition · Computer Science 2020-08-12 Aneeshan Sain , Ayan Kumar Bhunia , Yongxin Yang , Tao Xiang , Yi-Zhe Song