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Recent advances in self-supervised learning (SSL) have shown tremendous potential for learning 3D point cloud representations without human annotations. However, SSL for 3D point clouds still faces critical challenges due to irregular…

Computer Vision and Pattern Recognition · Computer Science 2025-12-15 Mohamed Abdelsamad , Michael Ulrich , Bin Yang , Miao Zhang , Yakov Miron , Abhinav Valada

While super-resolution (SR) methods based on diffusion models exhibit promising results, their practical application is hindered by the substantial number of required inference steps. Recent methods utilize degraded images in the initial…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Yufei Wang , Wenhan Yang , Xinyuan Chen , Yaohui Wang , Lanqing Guo , Lap-Pui Chau , Ziwei Liu , Yu Qiao , Alex C. Kot , Bihan Wen

Cross-modal contrastive learning has led the recent advances in multimodal retrieval with its simplicity and effectiveness. In this work, however, we reveal that cross-modal contrastive learning suffers from incorrect normalization of the…

Information Retrieval · Computer Science 2022-12-23 Yookoon Park , Mahmoud Azab , Bo Xiong , Seungwhan Moon , Florian Metze , Gourab Kundu , Kirmani Ahmed

Existing Score Distillation Sampling (SDS)-based methods have driven significant progress in text-to-3D generation. However, 3D models produced by SDS-based methods tend to exhibit over-smoothing and low-quality outputs. These issues arise…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Uy Dieu Tran , Minh Luu , Phong Ha Nguyen , Khoi Nguyen , Binh-Son Hua

Many machine translation toolkits make use of a data preparation step wherein raw data is transformed into a tensor format that can be used directly by the trainer. This preparation step is increasingly at odds with modern research and…

Computation and Language · Computer Science 2023-08-16 Matt Post , Thamme Gowda , Roman Grundkiewicz , Huda Khayrallah , Rohit Jain , Marcin Junczys-Dowmunt

Scene Text Image Super-Resolution (STISR) aims to restore high-resolution details in low-resolution text images, which is crucial for both human readability and machine recognition. Existing methods, however, often depend on external…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Axi Niu , Kang Zhang , Qingsen Yan , Hao Jin , Jinqiu Sun , Yanning Zhang

Diffusion models (DMs) are a class of generative models that allow sampling from a distribution learned over a training set. When applied to solving inverse problems, the reverse sampling steps are modified to approximately sample from a…

Image and Video Processing · Electrical Eng. & Systems 2025-05-27 Ismail Alkhouri , Shijun Liang , Cheng-Han Huang , Jimmy Dai , Qing Qu , Saiprasad Ravishankar , Rongrong Wang

The empirical success of distributional reinforcement learning (RL) highly relies on the choice of distribution divergence equipped with an appropriate distribution representation. In this paper, we propose \textit{Sinkhorn distributional…

Machine Learning · Computer Science 2024-10-16 Ke Sun , Yingnan Zhao , Wulong Liu , Bei Jiang , Linglong Kong

Vision-language retrieval is an important multi-modal learning topic, where the goal is to retrieve the most relevant visual candidate for a given text query. Recently, pre-trained models, e.g., CLIP, show great potential on retrieval…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Haojun Jiang , Jianke Zhang , Rui Huang , Chunjiang Ge , Zanlin Ni , Shiji Song , Gao Huang

Restoring low-resolution text images presents a significant challenge, as it requires maintaining both the fidelity and stylistic realism of the text in restored images. Existing text image restoration methods often fall short in hard…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Chenglu Pan , Xiaogang Xu , Ganggui Ding , Yunke Zhang , Wenbo Li , Jiarong Xu , Qingbiao Wu

Given an input video of a person and a new garment, the objective of this paper is to synthesize a new video where the person is wearing the specified garment while maintaining spatiotemporal consistency. Although significant advances have…

Computer Vision and Pattern Recognition · Computer Science 2024-12-19 Hung Nguyen , Quang Qui-Vinh Nguyen , Khoi Nguyen , Rang Nguyen

Most image super-resolution (SR) methods are developed on synthetic low-resolution (LR) and high-resolution (HR) image pairs that are constructed by a predetermined operation, e.g., bicubic downsampling. As existing methods typically learn…

Image and Video Processing · Electrical Eng. & Systems 2021-09-09 Sanghyun Son , Jaeha Kim , Wei-Sheng Lai , Ming-Husan Yang , Kyoung Mu Lee

Diffusion models have quickly risen in popularity for their ability to model complex distributions and perform effective posterior sampling. Unfortunately, the iterative nature of these generative models makes them computationally expensive…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Tristan S. W. Stevens , Oisín Nolan , Jean-Luc Robert , Ruud J. G. van Sloun

DNN-based cross-modal retrieval has become a research hotspot, by which users can search results across various modalities like image and text. However, existing methods mainly focus on the pairwise correlation and reconstruction error of…

Machine Learning · Computer Science 2017-04-06 Xin Huang , Yuxin Peng

Linear probing (LP) (and $k$-NN) on the upstream dataset with labels (e.g., ImageNet) and transfer learning (TL) to various downstream datasets are commonly employed to evaluate the quality of visual representations learned via…

Computer Vision and Pattern Recognition · Computer Science 2023-04-10 Jae-Hun Lee , Doyoung Yoon , ByeongMoon Ji , Kyungyul Kim , Sangheum Hwang

Self-supervised learning (SSL) enables label efficient training for machine learning models. This is essential for domains such as medical imaging, where labels are costly and time-consuming to curate. However, the most effective supervised…

Computer Vision and Pattern Recognition · Computer Science 2023-05-16 Cara Van Uden , Jeremy Irvin , Mars Huang , Nathan Dean , Jason Carr , Andrew Ng , Curtis Langlotz

Diffusion models have demonstrated exceptional capabilities in image restoration, yet their application to video super-resolution (VSR) faces significant challenges in balancing fidelity with temporal consistency. Our evaluation reveals a…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Xiaohui Li , Yihao Liu , Shuo Cao , Ziyan Chen , Shaobin Zhuang , Xiangyu Chen , Yinan He , Yi Wang , Yu Qiao

This paper proposes a new evaluation protocol for cross-media retrieval which better fits the real-word applications. Both image-text and text-image retrieval modes are considered. Traditionally, class labels in the training and testing…

Computer Vision and Pattern Recognition · Computer Science 2017-03-13 Ruoyu Liu , Yao Zhao , Liang Zheng , Shikui Wei , Yi Yang

In recent years, considerable progress on the task of text-video retrieval has been achieved by leveraging large-scale pretraining on visual and audio datasets to construct powerful video encoders. By contrast, despite the natural symmetry,…

Computer Vision and Pattern Recognition · Computer Science 2021-09-28 Ioana Croitoru , Simion-Vlad Bogolin , Marius Leordeanu , Hailin Jin , Andrew Zisserman , Samuel Albanie , Yang Liu

Score Distillation Sampling (SDS) has achieved remarkable success in text-to-3D content generation. However, SDS-based methods struggle to maintain semantic fidelity for user prompts, particularly when involving multiple objects with…

Computer Vision and Pattern Recognition · Computer Science 2025-08-14 Chenhan Jiang , Yihan Zeng , Dit-Yan Yeung