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Vision-language models (VLMs) such as CLIP demonstrate strong performance but struggle when adapted to downstream tasks. Prompt learning has emerged as an efficient and effective strategy to adapt VLMs while preserving their pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2025-12-02 Xiwen Chen , Wenhui Zhu , Peijie Qiu , Hao Wang , Huayu Li , Haiyu Wu , Aristeidis Sotiras , Yalin Wang , Abolfazl Razi

Vision and Language Models (VLMs), such as CLIP, have enabled visual recognition of a potentially unlimited set of categories described by text prompts. However, for the best visual recognition performance, these models still require tuning…

Computer Vision and Pattern Recognition · Computer Science 2023-09-14 M. Jehanzeb Mirza , Leonid Karlinsky , Wei Lin , Horst Possegger , Rogerio Feris , Horst Bischof

Vision-Language Models (VLMs), such as CLIP, have achieved significant zero-shot performance on downstream tasks with various fine-tuning adaptation methods. However, recent studies have proven that adversarial attacks can significantly…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Jia-Wei Hai , Yijun Wang , Xiu-Shen Wei

We study the task of extending the large language model (LLM) into a vision-language instruction-following model. This task is crucial but challenging since the LLM is trained on text modality only, making it hard to effectively digest the…

Computer Vision and Pattern Recognition · Computer Science 2023-12-01 Lizhao Liu , Xinyu Sun , Tianhang Xiang , Zhuangwei Zhuang , Liuren Yin , Mingkui Tan

Image-to-image translation has emerged as a powerful technique in medical imaging, enabling tasks such as image denoising and cross-modality conversion. However, it suffers from limitations in handling out-of-distribution samples without…

Computer Vision and Pattern Recognition · Computer Science 2025-09-17 Irene Iele , Francesco Di Feola , Valerio Guarrasi , Paolo Soda

Vision-language models (VLMs) have shown remarkable ability in aligning visual and textual representations, enabling a wide range of multimodal applications. However, their large-scale training data inevitably raises concerns about privacy,…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Shen Lin , Junhao Dong , Rongjie Chen , Xiaoyu Zhang , Li Xu , Xiaofeng Chen

Test-time adaptation (TTA) is an effective approach to mitigate performance degradation of trained models when encountering input distribution shifts at test time. However, existing TTA methods often suffer significant performance drops…

Machine Learning · Computer Science 2025-02-06 Minguk Jang , Hye Won Chung

Visual-language models (VLMs) like CLIP exhibit strong generalization but struggle with distribution shifts at test time. Existing training-free test-time adaptation (TTA) methods operate strictly within CLIP's original feature space,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Jizhou Han , Chenhao Ding , SongLin Dong , Yuhang He , Xinyuan Gao , Yihong Gong

Adapting pre-trained models to open classes is a challenging problem in machine learning. Vision-language models fully explore the knowledge of text modality, demonstrating strong zero-shot recognition performance, which is naturally suited…

Computer Vision and Pattern Recognition · Computer Science 2024-08-30 Zhengqing Gao , Xiang Ao , Xu-Yao Zhang , Cheng-Lin Liu

Pre-trained vision-language models such as contrastive language-image pre-training (CLIP) have demonstrated a remarkable generalizability, which has enabled a wide range of applications represented by zero-shot classification. However,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Kazuki Adachi , Shin'ya Yamaguchi , Tomoki Hamagami

Vision-language models (VLMs), such as CLIP, have demonstrated exceptional generalization capabilities and can quickly adapt to downstream tasks through prompt fine-tuning. Unfortunately, in classification tasks involving non-training…

Computer Vision and Pattern Recognition · Computer Science 2025-02-06 Song-Lin Lv , Yu-Yang Chen , Zhi Zhou , Yu-Feng Li , Lan-Zhe Guo

Tactile-vision-language (TVL) models are increasingly deployed in real-world robotic and multimodal perception tasks, where test-time distribution shifts are unavoidable. Existing test-time adaptation (TTA) methods provide filtering in…

Robotics · Computer Science 2026-02-19 Chuyang Ye , Haoxian Jing , Qinting Jiang , Yixi Lin , Qiang Li , Xing Tang , Jingyan Jiang

Recently, test-time adaptation has attracted wide interest in the context of vision-language models for image classification. However, to the best of our knowledge, the problem is completely overlooked in dense prediction tasks such as…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Mehrdad Noori , David Osowiechi , Gustavo Adolfo Vargas Hakim , Ali Bahri , Moslem Yazdanpanah , Sahar Dastani , Farzad Beizaee , Ismail Ben Ayed , Christian Desrosiers

This paper presents Prototypical Contrastive Learning (PCL), an unsupervised representation learning method that addresses the fundamental limitations of instance-wise contrastive learning. PCL not only learns low-level features for the…

Computer Vision and Pattern Recognition · Computer Science 2021-03-31 Junnan Li , Pan Zhou , Caiming Xiong , Steven C. H. Hoi

Test-time adaptation (TTA) is a technique aimed at enhancing the generalization performance of models by leveraging unlabeled samples solely during prediction. Given the need for robustness in neural network systems when faced with…

Machine Learning · Computer Science 2023-07-07 Yongcan Yu , Lijun Sheng , Ran He , Jian Liang

Contrastive vision-language (V&L) models remain a popular choice for various applications. However, several limitations have emerged, most notably the limited ability of V&L models to learn compositional representations. Prior methods often…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Hai X. Pham , David T. Hoffmann , Ricardo Guerrero , Brais Martinez

Test-time adaptation (TTA) aims to address distribution shifts between source and target data by relying solely on target data during testing. In open-world scenarios, models often encounter noisy samples, i.e., samples outside the…

Machine Learning · Computer Science 2025-04-08 Chentao Cao , Zhun Zhong , Zhanke Zhou , Tongliang Liu , Yang Liu , Kun Zhang , Bo Han

Test-time adaptation (TTA) of Vision-Language Models (VLMs) has emerged as a technique for tackling distribution shifts during the test time. Recent research indicates that the test-time adaptation is intrinsically linked to the model's…

Computer Vision and Pattern Recognition · Computer Science 2026-03-06 Aodi Li , Liansheng Zhuang , Xiao Long , Houqiang Li , Shafei Wang

Contrastive Language-Image Pretraining (CLIP) model has exhibited remarkable efficacy in establishing cross-modal connections between texts and images, yielding impressive performance across a broad spectrum of downstream applications…

Computer Vision and Pattern Recognition · Computer Science 2024-01-17 Yi Zhang , Ce Zhang , Ke Yu , Yushun Tang , Zhihai He

Machine learning methods strive to acquire a robust model during the training process that can effectively generalize to test samples, even in the presence of distribution shifts. However, these methods often suffer from performance…

Machine Learning · Computer Science 2024-12-13 Jian Liang , Ran He , Tieniu Tan