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Visual retrieval tasks such as image retrieval and person re-identification (Re-ID) aim at effectively and thoroughly searching images with similar content or the same identity. After obtaining retrieved examples, re-ranking is a widely…

Computer Vision and Pattern Recognition · Computer Science 2023-06-16 Yuqi Zhang , Qi Qian , Hongsong Wang , Chong Liu , Weihua Chen , Fan Wang

Re-ranking utilizes contextual information to optimize the initial ranking list of person or vehicle re-identification (re-ID), which boosts the retrieval performance at post-processing steps. This paper proposes a re-ranking network to…

Computer Vision and Pattern Recognition · Computer Science 2022-03-22 Yunhao Zhou , Yi Wang , Lap-Pui Chau

Content Based Image Retrieval(CBIR) is one of the important subfield in the field of Information Retrieval. The goal of a CBIR algorithm is to retrieve semantically similar images in response to a query image submitted by the end user. CBIR…

Information Retrieval · Computer Science 2014-09-03 Vikas Verma

Contrastive Language--Image Pre-training (CLIP) has manifested remarkable improvements in zero-shot classification and cross-modal vision-language tasks. Yet, from a geometrical point of view, the CLIP embedding space has been found to have…

Computer Vision and Pattern Recognition · Computer Science 2024-09-17 Sedigheh Eslami , Gerard de Melo

Vision-Language Pre-training (VLP) models like CLIP have significantly advanced Remote Sensing Image-Text Retrieval (RSITR). However, existing methods predominantly rely on coarse-grained global alignment, which often overlooks the dense,…

Computer Vision and Pattern Recognition · Computer Science 2026-01-27 Yifan Li , Shiying Wang , Jianqiang Huang

Our target is to learn visual correspondence from unlabeled videos. We develop LIIR, a locality-aware inter-and intra-video reconstruction framework that fills in three missing pieces, i.e., instance discrimination, location awareness, and…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Liulei Li , Tianfei Zhou , Wenguan Wang , Lu Yang , Jianwu Li , Yi Yang

Self-supervised contrastive learning models, such as CLIP, have set new benchmarks for vision-language models in many downstream tasks. However, their dependency on rigid one-to-one mappings overlooks the complex and often multifaceted…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Yiming Zhang , Zhuokai Zhao , Zhaorun Chen , Zhili Feng , Zenghui Ding , Yining Sun

This paper proposes Spatially-Weighted CLIP (SW-CLIP), a novel framework for street-view geo-localization that explicitly incorporates spatial autocorrelation into vision-language contrastive learning. Unlike conventional CLIP-based methods…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Ting Han , Fengjiao Li , Chunsong Chen , Haoling Huang , Yiping Chen , Meiliu Wu

Samples from intimate (non-linear) mixtures are generally modeled as being drawn from a smooth manifold. Scenarios where the data contains multiple intimate mixtures with some constituent materials in common can be thought of as manifolds…

Computer Vision and Pattern Recognition · Computer Science 2017-08-15 Arun M. Saranathan , Mario Parente

Current research on visual place recognition mostly focuses on aggregating local visual features of an image into a single vector representation. Therefore, high-level information such as the geometric arrangement of the features is…

Computer Vision and Pattern Recognition · Computer Science 2021-01-22 Felix Taubner , Florian Tschopp , Tonci Novkovic , Roland Siegwart , Fadri Furrer

Contrastive Language-Image Pretraining (CLIP) stands out as a prominent method for image representation learning. Various architectures, from vision transformers (ViTs) to convolutional networks (ResNets) have been trained with CLIP to…

Computer Vision and Pattern Recognition · Computer Science 2025-02-18 Cristian Rodriguez-Opazo , Ehsan Abbasnejad , Damien Teney , Hamed Damirchi , Edison Marrese-Taylor , Anton van den Hengel

CLIP-based person re-identification (ReID) methods aggregate spatial features into a single global \texttt{[CLS]} token optimized for image-text alignment rather than spatial selectivity, making representations fragile under occlusion and…

Computer Vision and Pattern Recognition · Computer Science 2026-04-27 Aotian Zheng , Winston Sun , Bahaa Alattar , Vitaly Ablavsky , Jenq-Neng Hwang

Prompt learning is effective for fine-tuning foundation models to improve their generalization across a variety of downstream tasks. However, the prompts that are independently optimized along a single modality path, may sacrifice the…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Yuncheng Yang , Chuyan Zhang , Zuopeng Yang , Yuting Gao , Yulei Qin , Ke Li , Xing Sun , Jie Yang , Yun Gu

In this paper, we introduce DetailCLIP: A Detail-Oriented CLIP to address the limitations of contrastive learning-based vision-language models, particularly CLIP, in handling detail-oriented and fine-grained tasks like segmentation. While…

Computer Vision and Pattern Recognition · Computer Science 2025-04-02 Amin Karimi Monsefi , Kishore Prakash Sailaja , Ali Alilooee , Ser-Nam Lim , Rajiv Ramnath

Matching deformable objects using their shapes is an important problem in computer vision since shape is perhaps the most distinguishable characteristic of an object. The problem is difficult due to many factors such as intra-class…

Computer Vision and Pattern Recognition · Computer Science 2015-04-28 Smit Marvaniya , Raj Gupta , Anurag Mittal

Pre-trained multi-modal Vision-Language Models like CLIP are widely used off-the-shelf for a variety of applications. In this paper, we show that the common practice of individually exploiting the text or image encoders of these powerful…

Computer Vision and Pattern Recognition · Computer Science 2025-02-07 Marco Mistretta , Alberto Baldrati , Lorenzo Agnolucci , Marco Bertini , Andrew D. Bagdanov

Multimodal fusion breaks through the boundaries between diverse modalities and has already achieved notable performances. However, in many specialized fields, it is struggling to obtain sufficient alignment data for training, which…

Machine Learning · Computer Science 2024-09-24 Zijia Song , Zelin Zang , Yelin Wang , Guozheng Yang , Kaicheng yu , Wanyu Chen , Miaoyu Wang , Stan Z. Li

Conventional object detectors rely on cross-entropy classification, which can be vulnerable to class imbalance and label noise. We propose CLIP-Joint-Detect, a simple and detector-agnostic framework that integrates CLIP-style contrastive…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Behnam Raoufi , Hossein Sharify , Mohamad Mahdee Ramezanee , Khosrow Hajsadeghi , Saeed Bagheri Shouraki

Large-scale vision-language models demonstrate strong multimodal alignment and generalization across diverse tasks. Among them, CLIP stands out as one of the most successful approaches. In this work, we extend the application of CLIP to…

Computer Vision and Pattern Recognition · Computer Science 2025-05-09 Sooyoung Park , Arda Senocak , Joon Son Chung

Ad-hoc Video Search (AVS) enables users to search for unlabeled video content using on-the-fly textual queries. Current deep learning-based models for AVS are trained to optimize holistic similarity between short videos and their associated…

Multimedia · Computer Science 2024-01-17 Aozhu Chen , Fangming Zhou , Ziyuan Wang , Xirong Li