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Vision-language models (VLMs) such as CLIP are trained via contrastive learning between text and image pairs, resulting in aligned image and text embeddings that are useful for many downstream tasks. A notable drawback of CLIP, however, is…

Machine Learning · Computer Science 2025-07-08 Dylan Sam , Devin Willmott , Joao D. Semedo , J. Zico Kolter

Large-scale but noisy image-text pair data have paved the way for the success of Contrastive Language-Image Pretraining (CLIP). As the foundation vision encoder, CLIP in turn serves as the cornerstone for most large vision-language models…

Computer Vision and Pattern Recognition · Computer Science 2025-07-31 Zhixiang Wei , Guangting Wang , Xiaoxiao Ma , Ke Mei , Huaian Chen , Yi Jin , Fengyun Rao

We study the effectiveness of data-balancing for mitigating biases in contrastive language-image pretraining (CLIP), identifying areas of strength and limitation. First, we reaffirm prior conclusions that CLIP models can inadvertently…

Machine Learning · Computer Science 2024-03-08 Ibrahim Alabdulmohsin , Xiao Wang , Andreas Steiner , Priya Goyal , Alexander D'Amour , Xiaohua Zhai

Contrastive Language-Image Pre-training (CLIP) models excel in zero-shot classification, yet face challenges in complex multi-object scenarios. This study offers a comprehensive analysis of CLIP's limitations in these contexts using a…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Reza Abbasi , Ali Nazari , Aminreza Sefid , Mohammadali Banayeeanzade , Mohammad Hossein Rohban , Mahdieh Soleymani Baghshah

Image segmentation relies on large annotated datasets, which are expensive and slow to produce. Silver-standard (AI-generated) labels are easier to obtain, but they risk introducing bias. Self-supervised learning, needing only images, has…

Computer Vision and Pattern Recognition · Computer Science 2026-03-19 Marceau Lafargue-Hauret , Raghav Mehta , Fabio De Sousa Ribeiro , Mélanie Roschewitz , Ben Glocker

Lung nodule malignancy prediction has been enhanced by advanced deep-learning techniques and effective tricks. Nevertheless, current methods are mainly trained with cross-entropy loss using one-hot categorical labels, which results in…

Computer Vision and Pattern Recognition · Computer Science 2023-10-03 Yiming Lei , Zilong Li , Yan Shen , Junping Zhang , Hongming Shan

Pre-trained Vision-Language Models (VLMs), such as CLIP, have shown enhanced performance across a range of tasks that involve the integration of visual and linguistic modalities. When CLIP is used for depth estimation tasks, the patches,…

Computer Vision and Pattern Recognition · Computer Science 2023-11-03 Xueting Hu , Ce Zhang , Yi Zhang , Bowen Hai , Ke Yu , Zhihai He

CLIP has shown promising performance across many short-text tasks in a zero-shot manner. However, limited by the input length of the text encoder, CLIP struggles on under-stream tasks with long-text inputs ($>77$ tokens). To remedy this…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Bingchao Wang , Zhiwei Ning , Jianyu Ding , Xuanang Gao , Yin Li , Dongsheng Jiang , Jie Yang , Wei Liu

Vision-language pre-training such as CLIP enables zero-shot transfer that can classify images according to the candidate class names. While CLIP demonstrates an impressive zero-shot performance on diverse downstream tasks, the distribution…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Qi Qian , Juhua Hu

We propose DiffCLIP, a novel vision-language model that extends the differential attention mechanism to CLIP architectures. Differential attention was originally developed for large language models to amplify relevant context while…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Hasan Abed Al Kader Hammoud , Bernard Ghanem

The CLIP (Contrastive Language-Image Pre-training) model and its variants are becoming the de facto backbone in many applications. However, training a CLIP model from hundreds of millions of image-text pairs can be prohibitively expensive.…

Computer Vision and Pattern Recognition · Computer Science 2023-05-10 Liangliang Cao , Bowen Zhang , Chen Chen , Yinfei Yang , Xianzhi Du , Wencong Zhang , Zhiyun Lu , Yantao Zheng

Recent studies have shown that Contrastive Language-Image Pre-training (CLIP) models are threatened by targeted data poisoning and backdoor attacks due to massive training image-caption pairs crawled from the Internet. Previous defense…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Tong Zhang , Kuofeng Gao , Jiawang Bai , Leo Yu Zhang , Xin Yin , Zonghui Wang , Shouling Ji , Wenzhi Chen

The continual learning setting aims to learn new tasks over time without forgetting the previous ones. The literature reports several significant efforts to tackle this problem with limited or no access to previous task data. Among such…

Computer Vision and Pattern Recognition · Computer Science 2022-10-07 Vishal Thengane , Salman Khan , Munawar Hayat , Fahad Khan

Zero-shot anomaly detection (ZSAD) aims to detect anomalies without any target domain training samples, relying solely on external auxiliary data. Existing CLIP-based methods attempt to activate the model's ZSAD potential via handcrafted or…

Computer Vision and Pattern Recognition · Computer Science 2025-10-07 Ziteng Yang , Jingzehua Xu , Yanshu Li , Zepeng Li , Yeqiang Wang , Xinghui Li

Multi-modal learning has become increasingly popular due to its ability to leverage information from different data sources (e.g., text and images) to improve the model performance. Recently, CLIP has emerged as an effective approach that…

Machine Learning · Computer Science 2024-07-12 Zixiang Chen , Yihe Deng , Yuanzhi Li , Quanquan Gu

We introduce eCLIP, an enhanced version of the CLIP model that integrates expert annotations in the form of radiologist eye-gaze heatmaps. It tackles key challenges in contrastive multi-modal medical imaging analysis, notably data scarcity…

Computer Vision and Pattern Recognition · Computer Science 2024-07-16 Yogesh Kumar , Pekka Marttinen

In an out-of-distribution (OOD) detection problem, samples of known classes(also called in-distribution classes) are used to train a special classifier. In testing, the classifier can (1) classify the test samples of known classes to their…

Computer Vision and Pattern Recognition · Computer Science 2023-02-06 Sepideh Esmaeilpour , Bing Liu , Eric Robertson , Lei Shu

In multimodal learning, CLIP has emerged as the de-facto approach for mapping different modalities into a shared latent space by bringing semantically similar representations closer while pushing apart dissimilar ones. However, CLIP-based…

Computer Vision and Pattern Recognition · Computer Science 2026-02-24 Eleonora Grassucci , Giordano Cicchetti , Danilo Comminiello

CLIP is a widely used foundational vision-language model that is used for zero-shot image recognition and other image-text alignment tasks. We demonstrate that CLIP is vulnerable to change in image quality under compression. This surprising…

Computer Vision and Pattern Recognition · Computer Science 2023-11-27 Cangxiong Chen , Vinay P. Namboodiri , Julian Padget

Contrastive Language-Image Pretraining (CLIP) has demonstrated great zero-shot performance for matching images and text. However, it is still challenging to adapt vision-lanaguage pretrained models like CLIP to compositional image and text…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Kenan Jiang , Xuehai He , Ruize Xu , Xin Eric Wang