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State-of-the-art natural language understanding classification models follow two-stages: pre-training a large language model on an auxiliary task, and then fine-tuning the model on a task-specific labeled dataset using cross-entropy loss.…

计算与语言 · 计算机科学 2021-04-06 Beliz Gunel , Jingfei Du , Alexis Conneau , Ves Stoyanov

We investigate a strategy for improving the efficiency of contrastive learning of visual representations by leveraging a small amount of supervised information during pre-training. We propose a semi-supervised loss, SuNCEt, based on…

机器学习 · 计算机科学 2020-12-03 Mahmoud Assran , Nicolas Ballas , Lluis Castrejon , Michael Rabbat

Video object detection is a challenging task because videos often suffer from image deterioration such as motion blur, occlusion, and deformable shapes, making it significantly more difficult than detecting objects in still images. Prior…

计算机视觉与模式识别 · 计算机科学 2025-08-29 Lucas Rakotoarivony

In step with the digitalization of transportation, we are witnessing a growing range of path-based smart-city applications, e.g., travel-time estimation and travel path ranking. A temporal path(TP) that includes temporal information, e.g.,…

机器学习 · 计算机科学 2022-04-18 Sean Bin Yang , Chenjuan Guo , Jilin Hu , Bin Yang , Jian Tang , Christian S. Jensen

The challenges in applying contrastive learning to speaker verification (SV) are that the softmax-based contrastive loss lacks discriminative power and that the hard negative pairs can easily influence learning. To overcome the first…

音频与语音处理 · 电气工程与系统科学 2023-03-14 Zhe Li , Man-Wai Mak , Helen Mei-Ling Meng

Contrastive self-supervised learning has outperformed supervised pretraining on many downstream tasks like segmentation and object detection. However, current methods are still primarily applied to curated datasets like ImageNet. In this…

计算机视觉与模式识别 · 计算机科学 2021-12-15 Wouter Van Gansbeke , Simon Vandenhende , Stamatios Georgoulis , Luc Van Gool

Autonomous driving in urban crowds at unregulated intersections is challenging, where dynamic occlusions and uncertain behaviors of other vehicles should be carefully considered. Traditional methods are heuristic and based on…

机器人学 · 计算机科学 2021-09-20 Peide Cai , Sukai Wang , Hengli Wang , Ming Liu

Existing scene text recognition (STR) methods struggle to recognize challenging texts, especially for artistic and severely distorted characters. The limitation lies in the insufficient exploration of character morphologies, including the…

计算机视觉与模式识别 · 计算机科学 2024-11-26 Yadong Qu , Yuxin Wang , Bangbang Zhou , Zixiao Wang , Hongtao Xie , Yongdong Zhang

The vision-language navigation (VLN) task requires an agent to reach a target with the guidance of natural language instruction. Previous works learn to navigate step-by-step following an instruction. However, these works may fail to…

计算机视觉与模式识别 · 计算机科学 2021-12-10 Xiwen Liang , Fengda Zhu , Yi Zhu , Bingqian Lin , Bing Wang , Xiaodan Liang

In this paper, we propose a simple variant of the original stochastic variance reduction gradient (SVRG), where hereafter we refer to as the variance reduced stochastic gradient descent (VR-SGD). Different from the choices of the snapshot…

机器学习 · 计算机科学 2017-04-18 Fanhua Shang

Cross-lingual Cross-modal Retrieval (CCR) is an essential task in web search, which aims to break the barriers between modality and language simultaneously and achieves image-text retrieval in the multi-lingual scenario with a single model.…

信息检索 · 计算机科学 2024-06-27 Zhijie Nie , Richong Zhang , Zhangchi Feng , Hailang Huang , Xudong Liu

Contrastive learning is commonly used as a method of self-supervised learning with the "anchor" and "positive" being two random augmentations of a given input image, and the "negative" is the set of all other images. However, the…

计算机视觉与模式识别 · 计算机科学 2022-08-16 Rishab Balasubramanian , Kunal Rathore

Stochastic first-order methods for empirical risk minimization employ gradient approximations based on sampled data in lieu of exact gradients. Such constructions introduce noise into the learning dynamics, which can be corrected through…

机器学习 · 计算机科学 2025-03-18 Sean Xiao , Sangwoo Park , Stefan Vlaski

Videos are a rich source for self-supervised learning (SSL) of visual representations due to the presence of natural temporal transformations of objects. However, current methods typically randomly sample video clips for learning, which…

计算机视觉与模式识别 · 计算机科学 2022-09-30 Brian Chen , Ramprasaath R. Selvaraju , Shih-Fu Chang , Juan Carlos Niebles , Nikhil Naik

Supervised dictionary learning (SDL) is a classical machine learning method that simultaneously seeks feature extraction and classification tasks, which are not necessarily a priori aligned objectives. The goal of SDL is to learn a…

机器学习 · 统计学 2022-06-15 Joowon Lee , Hanbaek Lyu , Weixin Yao

Deep learning-based drug response prediction (DRP) methods can accelerate the drug discovery process and reduce R\&D costs. Although the mainstream methods achieve high accuracy in predicting response regression values, the regression-aware…

生物大分子 · 定量生物学 2023-12-19 Kun Li , Wenbin Hu

Robotic systems that rely primarily on self-supervised learning have the potential to decrease the amount of human annotation and engineering effort required to learn control strategies. In the same way that prior robotic systems have…

Discriminative representation is crucial for the association step in multi-object tracking. Recent work mainly utilizes features in single or neighboring frames for constructing metric loss and empowering networks to extract representation…

计算机视觉与模式识别 · 计算机科学 2022-04-06 En Yu , Zhuoling Li , Shoudong Han

In recent years, driven by the need for safer and more autonomous transport systems, the automotive industry has shifted toward integrating a growing number of Advanced Driver Assistance Systems (ADAS). Among the array of sensors employed…

计算机视觉与模式识别 · 计算机科学 2024-02-14 Colin Decourt , Rufin VanRullen , Didier Salle , Thomas Oberlin

We propose a self-supervised learning approach for videos that learns representations of both the RGB frames and the accompanying audio without human supervision. In contrast to images that capture the static scene appearance, videos also…

计算机视觉与模式识别 · 计算机科学 2023-02-16 Simon Jenni , Alexander Black , John Collomosse