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Automated systems that detect deception in high-stakes situations can enhance societal well-being across medical, social work, and legal domains. Existing models for detecting high-stakes deception in videos have been supervised, but…

Computer Vision and Pattern Recognition · Computer Science 2021-06-22 Leena Mathur , Maja J Matarić

Pre-training language models (LMs) on large-scale unlabeled text data makes the model much easier to achieve exceptional downstream performance than their counterparts directly trained on the downstream tasks. In this work, we study what…

Computation and Language · Computer Science 2022-02-21 Cheng-Han Chiang , Hung-yi Lee

The performance of differentially private machine learning can be boosted significantly by leveraging the transfer learning capabilities of non-private models pretrained on large public datasets. We critically review this approach. We…

Machine Learning · Computer Science 2024-07-18 Florian Tramèr , Gautam Kamath , Nicholas Carlini

User modeling is critical for many personalized web services. Many existing methods model users based on their behaviors and the labeled data of target tasks. However, these methods cannot exploit useful information in unlabeled user…

Information Retrieval · Computer Science 2020-10-06 Chuhan Wu , Fangzhao Wu , Tao Qi , Jianxun Lian , Yongfeng Huang , Xing Xie

Accumulating substantial volumes of real-world driving data proves pivotal in the realm of trajectory forecasting for autonomous driving. Given the heavy reliance of current trajectory forecasting models on data-driven methodologies, we aim…

Computer Vision and Pattern Recognition · Computer Science 2024-08-30 Yiheng Li , Seth Z. Zhao , Chenfeng Xu , Chen Tang , Chenran Li , Mingyu Ding , Masayoshi Tomizuka , Wei Zhan

This work addresses the problem of anonymizing the identity of faces in a dataset of images, such that the privacy of those depicted is not violated, while at the same time the dataset is useful for downstream task such as for training…

Computer Vision and Pattern Recognition · Computer Science 2023-03-21 Simone Barattin , Christos Tzelepis , Ioannis Patras , Nicu Sebe

How to learn discriminative video representation from unlabeled videos is challenging but crucial for video analysis. The latest attempts seek to learn a representation model by predicting the appearance contents in the masked regions.…

Computer Vision and Pattern Recognition · Computer Science 2023-03-24 Xinyu Sun , Peihao Chen , Liangwei Chen , Changhao Li , Thomas H. Li , Mingkui Tan , Chuang Gan

Wearable accelerometers are widely used for continuous monitoring of physical activity. Supervised machine learning and deep learning algorithms have long been used to extract meaningful activity information from raw accelerometry data, but…

Signal Processing · Electrical Eng. & Systems 2025-05-28 Niels R. Lorenzen , Poul J. Jennum , Emmanuel Mignot , Andreas Brink-Kjaer

The lack of large-scale real datasets with annotations makes transfer learning a necessity for video activity understanding. We aim to develop an effective method for few-shot transfer learning for first-person action classification. We…

Computer Vision and Pattern Recognition · Computer Science 2021-12-09 Huseyin Coskun , Zeeshan Zia , Bugra Tekin , Federica Bogo , Nassir Navab , Federico Tombari , Harpreet Sawhney

Pre-training produces representations that are effective for a wide range of downstream tasks, but it is still unclear what properties of pre-training are necessary for effective gains. Notably, recent work shows that even pre-training on…

Machine Learning · Computer Science 2022-06-22 Yuhuai Wu , Felix Li , Percy Liang

We address the computational problem of novel human pose synthesis. Given an image of a person and a desired pose, we produce a depiction of that person in that pose, retaining the appearance of both the person and background. We present a…

Computer Vision and Pattern Recognition · Computer Science 2018-04-23 Guha Balakrishnan , Amy Zhao , Adrian V. Dalca , Fredo Durand , John Guttag

Federated learning enables training a global machine learning model from data distributed across multiple sites, without having to move the data. This is particularly relevant in healthcare applications, where data is rife with personal,…

Cryptography and Security · Computer Science 2020-02-24 Olivia Choudhury , Aris Gkoulalas-Divanis , Theodoros Salonidis , Issa Sylla , Yoonyoung Park , Grace Hsu , Amar Das

Tiny Actions Challenge focuses on understanding human activities in real-world surveillance. Basically, there are two main difficulties for activity recognition in this scenario. First, human activities are often recorded at a distance, and…

Computer Vision and Pattern Recognition · Computer Science 2025-12-19 Boyu Chen , Yu Qiao , Yali Wang

Human motion synthesis is an important problem with applications in graphics, gaming and simulation environments for robotics. Existing methods require accurate motion capture data for training, which is costly to obtain. Instead, we…

Computer Vision and Pattern Recognition · Computer Science 2022-08-15 Kevin Xie , Tingwu Wang , Umar Iqbal , Yunrong Guo , Sanja Fidler , Florian Shkurti

Deep video action recognition models have been highly successful in recent years but require large quantities of manually annotated data, which are expensive and laborious to obtain. In this work, we investigate the generation of synthetic…

Computer Vision and Pattern Recognition · Computer Science 2019-10-16 César Roberto de Souza , Adrien Gaidon , Yohann Cabon , Naila Murray , Antonio Manuel López

The widespread use of deep neural networks has achieved substantial success in many tasks. However, there still exists a huge gap between the operating mechanism of deep learning models and human-understandable decision making, so that…

Artificial Intelligence · Computer Science 2021-03-08 Xiaowei Zhou , Jie Yin , Ivor Tsang , Chen Wang

Generating and representing human behavior are of major importance for various computer vision applications. Commonly, human video synthesis represents behavior as sequences of postures while directly predicting their likely progressions or…

Computer Vision and Pattern Recognition · Computer Science 2021-04-23 Andreas Blattmann , Timo Milbich , Michael Dorkenwald , Björn Ommer

In the context of imitation learning applied to dexterous robotic hands, the high complexity of the systems makes learning complex manipulation tasks challenging. However, the numerous datasets depicting human hands in various different…

Robotics · Computer Science 2024-04-26 Davide Liconti , Yasunori Toshimitsu , Robert Katzschmann

The performance of modern machine learning systems depends on access to large, high-quality datasets, often sourced from user-generated content or proprietary, domain-specific corpora. However, these rich datasets inherently contain…

Cryptography and Security · Computer Science 2025-08-28 Zhan Shi , Yefeng Yuan , Yuhong Liu , Liang Cheng , Yi Fang

We address the problem of data augmentation for video action recognition. Standard augmentation strategies in video are hand-designed and sample the space of possible augmented data points either at random, without knowing which augmented…

Computer Vision and Pattern Recognition · Computer Science 2022-07-26 Shreyank N Gowda , Marcus Rohrbach , Frank Keller , Laura Sevilla-Lara
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