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Recent researches on unsupervised person re-identification~(reID) have demonstrated that pre-training on unlabeled person images achieves superior performance on downstream reID tasks than pre-training on ImageNet. However, those…

Computer Vision and Pattern Recognition · Computer Science 2023-04-13 Liping Bao , Longhui Wei , Xiaoyu Qiu , Wengang Zhou , Houqiang Li , Qi Tian

Due to the pervasiveness of image capturing devices in every-day life, images of individuals are routinely captured. Although this has enabled many benefits, it also infringes on personal privacy. A promising direction in research on…

Cryptography and Security · Computer Science 2021-02-23 William Croft , Jörg-Rüdiger Sack , Wei Shi

Security monitoring via ubiquitous cameras and their more extended in intelligent buildings stand to gain from advances in signal processing and machine learning. While these innovative and ground-breaking applications can be considered as…

Cryptography and Security · Computer Science 2026-05-06 Mehmet Yamac , Mete Ahishali , Nikolaos Passalis , Jenni Raitoharju , Bulent Sankur , Moncef Gabbouj

We present a framework to learn privacy-preserving encodings of images that inhibit inference of chosen private attributes, while allowing recovery of other desirable information. Rather than simply inhibiting a given fixed pre-trained…

Machine Learning · Computer Science 2018-12-06 Francesco Pittaluga , Sanjeev J. Koppal , Ayan Chakrabarti

Human motion is a behavioral biometric trait that can be used to identify individuals and infer private attributes such as medical conditions. This poses a serious threat to privacy as motion extraction from video and motion capture are…

Cryptography and Security · Computer Science 2025-07-16 Simon Hanisch , Julian Todt , Thorsten Strufe

Cameras are prevalent in our daily lives, and enable many useful systems built upon computer vision technologies such as smart cameras and home robots for service applications. However, there is also an increasing societal concern as the…

Computer Vision and Pattern Recognition · Computer Science 2020-10-01 Xiuye Gu , Weixin Luo , Michael S. Ryoo , Yong Jae Lee

We revisit two popular convolutional neural networks (CNN) in person re-identification (re-ID), i.e, verification and classification models. The two models have their respective advantages and limitations due to different loss functions. In…

Computer Vision and Pattern Recognition · Computer Science 2018-04-04 Zhedong Zheng , Liang Zheng , Yi Yang

Concerns for the privacy of individuals captured in public imagery have led to privacy-preserving action recognition. Existing approaches often suffer from issues arising through obfuscation being applied globally and a lack of…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Filip Ilic , He Zhao , Thomas Pock , Richard P. Wildes

In deep neural networks for facial recognition, feature vectors are numerical representations that capture the unique features of a given face. While it is known that a version of the original face can be recovered via "feature…

Cryptography and Security · Computer Science 2022-02-14 Emily Wenger , Francesca Falzon , Josephine Passananti , Haitao Zheng , Ben Y. Zhao

Growing leakage and misuse of visual information raise security and privacy concerns, which promotes the development of information protection. Existing adversarial perturbations-based methods mainly focus on the de-identification against…

Computer Vision and Pattern Recognition · Computer Science 2023-08-29 Zhigang Su , Dawei Zhou , Nannan Wangu , Decheng Li , Zhen Wang , Xinbo Gao

Fine-tuning Large Language Models (LLMs) on sensitive datasets carries a substantial risk of unintended memorization and leakage of Personally Identifiable Information (PII), which can violate privacy regulations and compromise individual…

We propose a reversible face de-identification method for low resolution video data, where landmark-based techniques cannot be reliably used. Our solution is able to generate a photo realistic de-identified stream that meets the data…

Computer Vision and Pattern Recognition · Computer Science 2020-07-10 Hugo Proença

The proliferation of large AI models trained on uncurated, often sensitive web-scraped data has raised significant privacy concerns. One of the concerns is that adversaries can extract information about the training data using privacy…

Machine Learning · Computer Science 2024-07-24 Dominik Hintersdorf , Lukas Struppek , Daniel Neider , Kristian Kersting

Preserving privacy in sensitive data while pretraining large language models on small, domain-specific corpora presents a significant challenge. In this work, we take an exploratory step toward privacy-preserving continual pretraining by…

Cryptography and Security · Computer Science 2026-01-13 Honghao Liu , Xuhui Jiang , Chengjin Xu , Cehao Yang , Yiran Cheng , Lionel Ni , Jian Guo

Recently, Person Re-Identification (Re-ID) has received a lot of attention. Large datasets containing labeled images of various individuals have been released, allowing researchers to develop and test many successful approaches. However,…

Computer Vision and Pattern Recognition · Computer Science 2022-12-21 Jose Huaman , Felix O. Sumari , Luigy Machaca , Esteban Clua , Joris Guerin

This paper proposes a sensor data anonymization model that is trained on decentralized data and strikes a desirable trade-off between data utility and privacy, even in heterogeneous settings where the sensor data have different underlying…

Machine Learning · Computer Science 2023-10-24 Xin Yang , Omid Ardakanian

Most of the existing approaches for person re-identification consider a static setting where the number of cameras in the network is fixed. An interesting direction, which has received little attention, is to explore the dynamic nature of a…

Computer Vision and Pattern Recognition · Computer Science 2020-08-07 Sk Miraj Ahmed , Aske R Lejbølle , Rameswar Panda , Amit K. Roy-Chowdhury

We propose a novel architecture which is able to automatically anonymize faces in images while retaining the original data distribution. We ensure total anonymization of all faces in an image by generating images exclusively on privacy-safe…

Computer Vision and Pattern Recognition · Computer Science 2019-09-11 Håkon Hukkelås , Rudolf Mester , Frank Lindseth

Person re-identification (ReID) suffers from a lack of large-scale high-quality training data due to challenges in data privacy and annotation costs. While previous approaches have explored pedestrian generation for data augmentation, they…

Computer Vision and Pattern Recognition · Computer Science 2025-12-03 Changxiao Ma , Chao Yuan , Xincheng Shi , Yuzhuo Ma , Yongfei Zhang , Longkun Zhou , Yujia Zhang , Shangze Li , Yifan Xu

A face image not only provides details about the identity of a subject but also reveals several attributes such as gender, race, sexual orientation, and age. Advancements in machine learning algorithms and popularity of sharing images on…

Computer Vision and Pattern Recognition · Computer Science 2018-10-01 Saheb Chhabra , Richa Singh , Mayank Vatsa , Gaurav Gupta