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This paper examines the robustness of a multi-modal computer vision model, CLIP (Contrastive Language-Image Pretraining), in the context of unsupervised learning. The main objective is twofold: first, to evaluate the robustness of CLIP, and…

Computer Vision and Pattern Recognition · Computer Science 2023-09-20 Clement Laroudie , Andrei Bursuc , Mai Lan Ha , Gianni Franchi

Prompt learning has emerged as an efficient and effective approach for transferring foundational Vision-Language Models (e.g., CLIP) to downstream tasks. However, current methods tend to overfit to seen categories, thereby limiting their…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Chen Xu , Yuhan Zhu , Guozhen Zhang , Haocheng Shen , Yixuan Liao , Xiaoxin Chen , Gangshan Wu , Limin Wang

Most image captioning frameworks generate captions directly from images, learning a mapping from visual features to natural language. However, editing existing captions can be easier than generating new ones from scratch. Intuitively, when…

Computer Vision and Pattern Recognition · Computer Science 2020-03-09 Fawaz Sammani , Luke Melas-Kyriazi

State-of-the-art approaches for image captioning require supervised training data consisting of captions with paired image data. These methods are typically unable to use unsupervised data such as textual data with no corresponding images,…

Computer Vision and Pattern Recognition · Computer Science 2017-06-27 Wenhu Chen , Aurelien Lucchi , Thomas Hofmann

Contrastive Language-Image Pretraining (CLIP) has demonstrated strong zero-shot performance across diverse downstream text-image tasks. Existing CLIP methods typically optimize a contrastive objective using negative samples drawn from each…

Machine Learning · Computer Science 2025-10-23 Haotian Sun , Yitong Li , Yuchen Zhuang , Niao He , Hanjun Dai , Bo Dai

We describe a protocol to study text-to-video retrieval training with unlabeled videos, where we assume (i) no access to labels for any videos, i.e., no access to the set of ground-truth captions, but (ii) access to labeled images in the…

Computer Vision and Pattern Recognition · Computer Science 2024-04-29 Lucas Ventura , Cordelia Schmid , Gül Varol

In this paper, a novel contrastive language-image pre-training (CLIP) model based semantic communication framework is designed. Compared to standard neural network (e.g.,convolutional neural network) based semantic encoders and decoders…

Machine Learning · Computer Science 2025-07-15 Shaoran Yang , Dongyu Wei , Hanzhi Yu , Zhaohui Yang , Yuchen Liu , Mingzhe Chen

Contrastive Language-Image Pre-training (CLIP), which excels at abstracting open-world representations across domains and modalities, has become a foundation for a variety of vision and multimodal tasks. However, recent studies reveal that…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Wenxuan Wang , Quan Sun , Fan Zhang , Yepeng Tang , Jing Liu , Xinlong Wang

Classifiers built upon vision-language models such as CLIP have shown remarkable zero-shot performance across a broad range of image classification tasks. Prior work has studied different ways of automatically creating descriptor sets for…

Computer Vision and Pattern Recognition · Computer Science 2024-08-15 Jan Hendrik Metzen , Piyapat Saranrittichai , Chaithanya Kumar Mummadi

Self-supervised models trained with a contrastive loss such as CLIP have shown to be very powerful in zero-shot classification settings. However, to be used as a zero-shot classifier these models require the user to provide new captions…

Machine Learning · Computer Science 2022-10-31 Bhawesh Kumar , Anil Palepu , Rudraksh Tuwani , Andrew Beam

Image captioning is a fundamental task that bridges the visual and linguistic domains, playing a critical role in pre-training Large Vision-Language Models (LVLMs). Current state-of-the-art captioning models are typically trained with…

Computer Vision and Pattern Recognition · Computer Science 2025-09-29 Long Xing , Xiaoyi Dong , Yuhang Zang , Yuhang Cao , Jianze Liang , Qidong Huang , Jiaqi Wang , Feng Wu , Dahua Lin

This paper presents a CLIP-based unsupervised learning method for annotation-free multi-label image classification, including three stages: initialization, training, and inference. At the initialization stage, we take full advantage of the…

Computer Vision and Pattern Recognition · Computer Science 2024-03-08 Rabab Abdelfattah , Qing Guo , Xiaoguang Li , Xiaofeng Wang , Song Wang

Existing image captioning systems are dedicated to generating narrative captions for images, which are spatially detached from the image in presentation. However, texts can also be used as decorations on the image to highlight the key…

Computer Vision and Pattern Recognition · Computer Science 2022-04-28 Yiqi Gao , Xinglin Hou , Yuanmeng Zhang , Tiezheng Ge , Yuning Jiang , Peng Wang

Recently, CLIP has become an important model for aligning images and text in multi-modal contexts. However, researchers have identified limitations in the ability of CLIP's text and image encoders to extract detailed knowledge from pairs of…

Artificial Intelligence · Computer Science 2024-12-10 Kuei-Chun Kao

We develop a Learning Direct Optimization (LiDO) method for the refinement of a latent variable model that describes input image x. Our goal is to explain a single image x with an interpretable 3D computer graphics model having scene graph…

Computer Vision and Pattern Recognition · Computer Science 2020-05-08 Lukasz Romaszko , Christopher K. I. Williams , John Winn

Self-supervised visual foundation models produce powerful embeddings that achieve remarkable performance on a wide range of downstream tasks. However, unlike vision-language models such as CLIP, self-supervised visual features are not…

Contrastive Language-Image Pre-training (CLIP) provides a foundation model by integrating natural language into visual concepts, enabling zero-shot recognition on downstream tasks. It is usually expected that satisfactory overall accuracy…

Computer Vision and Pattern Recognition · Computer Science 2023-10-06 Jie-Jing Shao , Jiang-Xin Shi , Xiao-Wen Yang , Lan-Zhe Guo , Yu-Feng Li

Traditional computer vision models are trained to predict a fixed set of predefined categories. Recently, natural language has been shown to be a broader and richer source of supervision that provides finer descriptions to visual concepts…

Computer Vision and Pattern Recognition · Computer Science 2021-04-20 Ruizhe Cheng , Bichen Wu , Peizhao Zhang , Peter Vajda , Joseph E. Gonzalez

In rapidly evolving field of vision-language models (VLMs), contrastive language-image pre-training (CLIP) has made significant strides, becoming foundation for various downstream tasks. However, relying on one-to-one (image, text)…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Haicheng Wang , Chen Ju , Weixiong Lin , Shuai Xiao , Mengting Chen , Yixuan Huang , Chang Liu , Mingshuai Yao , Jinsong Lan , Ying Chen , Qingwen Liu , Yanfeng Wang

Deep image prior (DIP) was recently introduced as an effective unsupervised approach for image restoration tasks. DIP represents the image to be recovered as the output of a deep convolutional neural network, and learns the network's…

Image and Video Processing · Electrical Eng. & Systems 2023-02-10 Riccardo Barbano , Johannes Leuschner , Maximilian Schmidt , Alexander Denker , Andreas Hauptmann , Peter Maaß , Bangti Jin