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In many real-world applications, reinforcement learning (RL) agents might have to solve multiple tasks, each one typically modeled via a reward function. If reward functions are expressed linearly, and the agent has previously learned a set…

Machine Learning · Computer Science 2022-06-24 Lucas N. Alegre , Ana L. C. Bazzan , Bruno C. da Silva

Multimodal models, such as the Contrastive Language-Image Pre-training (CLIP) model, have demonstrated remarkable success in aligning visual and linguistic representations. However, these models exhibit limitations when applied to…

Computer Vision and Pattern Recognition · Computer Science 2026-03-02 Hiroshi Sasaki

Driven by large-scale contrastive vision-language pre-trained models such as CLIP, recent advancements in the image-text matching task have achieved remarkable success in representation learning. Due to image-level visual-language…

Computer Vision and Pattern Recognition · Computer Science 2025-07-15 Mengxiao Tian , Xinxiao Wu , Shuo Yang

Recently, vision-language models like CLIP have advanced the state of the art in a variety of multi-modal tasks including image captioning and caption evaluation. Many approaches leverage CLIP for cross-modal retrieval to condition…

Computer Vision and Pattern Recognition · Computer Science 2025-02-11 Fabian Paischer , Markus Hofmarcher , Sepp Hochreiter , Thomas Adler

Transfer Learning (TL) has shown great potential to accelerate Reinforcement Learning (RL) by leveraging prior knowledge from past learned policies of relevant tasks. Existing transfer approaches either explicitly computes the similarity…

Recent advances in vision language models (VLM) have been driven by contrastive models such as CLIP, which learn to associate visual information with their corresponding text descriptions. However, these models have limitations in…

Computer Vision and Pattern Recognition · Computer Science 2025-02-21 Rim Assouel , Pietro Astolfi , Florian Bordes , Michal Drozdzal , Adriana Romero-Soriano

In text-video retrieval, recent works have benefited from the powerful learning capabilities of pre-trained text-image foundation models (e.g., CLIP) by adapting them to the video domain. A critical problem for them is how to effectively…

Computer Vision and Pattern Recognition · Computer Science 2023-08-16 Chaorui Deng , Qi Chen , Pengda Qin , Da Chen , Qi Wu

Reinforcement learning (RL) has demonstrated its ability to solve high dimensional tasks by leveraging non-linear function approximators. However, these successes are mostly achieved by 'black-box' policies in simulated domains. When…

Machine Learning · Computer Science 2021-11-19 Riad Akrour , Davide Tateo , Jan Peters

Contrastive learning methods, such as CLIP, leverage naturally paired data-for example, images and their corresponding text captions-to learn general representations that transfer efficiently to downstream tasks. While such approaches are…

Machine Learning · Computer Science 2024-11-05 Adriel Saporta , Aahlad Puli , Mark Goldstein , Rajesh Ranganath

The Visual Language Model, known for its robust cross-modal capabilities, has been extensively applied in various computer vision tasks. In this paper, we explore the use of CLIP (Contrastive Language-Image Pretraining), a vision-language…

Computer Vision and Pattern Recognition · Computer Science 2025-02-12 Huazhong Zhao , Lei Qi , Xin Geng

Contrastive cross-modal models such as CLIP and CLAP aid various vision-language (VL) and audio-language (AL) tasks. However, there has been limited investigation of and improvement in their language encoder, which is the central component…

Computation and Language · Computer Science 2023-10-23 Mengjie Zhao , Junya Ono , Zhi Zhong , Chieh-Hsin Lai , Yuhta Takida , Naoki Murata , Wei-Hsiang Liao , Takashi Shibuya , Hiromi Wakaki , Yuki Mitsufuji

Click-through rate (CTR) prediction plays as a core function module in various personalized online services. The traditional ID-based models for CTR prediction take as inputs the one-hot encoded ID features of tabular modality, which…

Information Retrieval · Computer Science 2024-10-31 Hangyu Wang , Jianghao Lin , Xiangyang Li , Bo Chen , Chenxu Zhu , Ruiming Tang , Weinan Zhang , Yong Yu

Text-based Person Retrieval (TPR) aims to retrieve the target person images given a textual query. The primary challenge lies in bridging the substantial gap between vision and language modalities, especially when dealing with limited…

Computer Vision and Pattern Recognition · Computer Science 2024-01-03 Yating Liu , Yaowei Li , Zimo Liu , Wenming Yang , Yaowei Wang , Qingmin Liao

Classical theory in reinforcement learning (RL) predominantly focuses on the single task setting, where an agent learns to solve a task through trial-and-error experience, given access to data only from that task. However, many recent…

Machine Learning · Computer Science 2022-06-28 Aldo Pacchiano , Ofir Nachum , Nilseh Tripuraneni , Peter Bartlett

People often give instructions whose meaning is ambiguous without further context, expecting that their actions or goals will disambiguate their intentions. How can we build assistive agents that follow such instructions in a flexible,…

Artificial Intelligence · Computer Science 2024-02-29 Tan Zhi-Xuan , Lance Ying , Vikash Mansinghka , Joshua B. Tenenbaum

Contrastive Language Image Pretraining (CLIP) has received widespread attention, since its learned representations can be transferred well to various downstream tasks. During the training process of the CLIP model, the InfoNCE objective…

Computer Vision and Pattern Recognition · Computer Science 2023-11-22 Delong Chen , Zhao Wu , Fan Liu , Zaiquan Yang , Huaxi Huang , Ying Tan , Erjin Zhou

Prompt learning is a powerful technique for transferring Vision-Language Models (VLMs) such as CLIP to downstream tasks. However, the prompt-based methods that are fine-tuned solely with base classes may struggle to generalize to novel…

Computer Vision and Pattern Recognition · Computer Science 2023-12-08 Mushui Liu , Weijie He , Ziqian Lu , Yunlong Yu

Reinforcement Learning (RL) algorithms are known to scale poorly to environments with many available actions, requiring numerous samples to learn an optimal policy. The traditional approach of considering the same fixed action space in…

Machine Learning · Computer Science 2023-05-15 Leo Ardon , Alberto Pozanco , Daniel Borrajo , Sumitra Ganesh

Human perception of visual similarity is inherently adaptive and subjective, depending on the users' interests and focus. However, most image retrieval systems fail to reflect this flexibility, relying on a fixed, monolithic metric that…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Sohwi Lim , Lee Hyoseok , Jungjoon Park , Tae-Hyun Oh

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