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With billions of personal images being generated from social media and cameras of all sorts on a daily basis, security and privacy are unprecedentedly challenged. Although extensive attempts have been made, existing face image…

Computer Vision and Pattern Recognition · Computer Science 2019-04-30 Tao Li , Lei Lin

The ubiquitous use of face recognition has sparked increasing privacy concerns, as unauthorized access to sensitive face images could compromise the information of individuals. This paper presents an in-depth study of the privacy protection…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Yuxi Mi , Yuge Huang , Jiazhen Ji , Minyi Zhao , Jiaxiang Wu , Xingkun Xu , Shouhong Ding , Shuigeng Zhou

Machine learning approaches for fringe projection profilometry (FPP) are hindered by the lack of large, diverse datasets and standardized benchmarking protocols. This paper introduces the first open-source, photorealistic synthetic dataset…

Image and Video Processing · Electrical Eng. & Systems 2026-02-04 Anush Lakshman S , Adam Haroon , Beiwen Li

The main aim of Privacy-Preserving Machine Learning (PPML) is to protect the privacy and provide security to the data used in building Machine Learning models. There are various techniques in PPML such as Secure Multi-Party Computation,…

Machine Learning · Computer Science 2022-06-01 Syed Imtiaz Ahamed , Vadlamani Ravi

Contactless and efficient systems are implemented rapidly to advocate preventive methods in the fight against the COVID-19 pandemic. Despite the positive benefits of such systems, there is potential for exploitation by invading user…

Computer Vision and Pattern Recognition · Computer Science 2022-03-24 Sachith Seneviratne , Nuran Kasthuriarachchi , Sanka Rasnayaka , Danula Hettiachchi , Ridwan Shariffdeen

Face recognition technology has been deployed in various real-life applications. The most sophisticated deep learning-based face recognition systems rely on training millions of face images through complex deep neural networks to achieve…

Computer Vision and Pattern Recognition · Computer Science 2024-01-25 Dong Han , Yong Li , Joachim Denzler

With the increasing adoption of data-hungry machine learning algorithms, personal data privacy has emerged as one of the key concerns that could hinder the success of digital transformation. As such, Privacy-Preserving Machine Learning…

Cryptography and Security · Computer Science 2022-04-22 Ziyao Liu , Jiale Guo , Kwok-Yan Lam , Jun Zhao

Portrait photo retouching is a photo retouching task that emphasizes human-region priority and group-level consistency. The lookup table-based method achieves promising retouching performance by learning image-adaptive weights to combine…

Image and Video Processing · Electrical Eng. & Systems 2021-12-08 Binglu Wang , Chengzhe Lu , Dawei Yan , Yongqiang Zhao

The utilisation of artificial intelligence in medicine and healthcare has led to successful clinical applications in several domains. The conflict between data usage and privacy protection requirements in such systems must be resolved for…

With the advancement of face recognition (FR) systems, privacy-preserving face recognition (PPFR) systems have gained popularity for their accurate recognition, enhanced facial privacy protection, and robustness to various attacks. However,…

Computer Vision and Pattern Recognition · Computer Science 2026-02-16 Dong Han , Yong Li , Joachim Denzler

In this paper, a privacy preserving image classification method is proposed under the use of ConvMixer models. To protect the visual information of test images, a test image is divided into blocks, and then every block is encrypted by using…

Computer Vision and Pattern Recognition · Computer Science 2023-01-18 Rei Aso , Tatsuya Chuman , Hitoshi Kiya

We resolve the ill-posed alpha matting problem from a completely different perspective. Given an input portrait image, instead of estimating the corresponding alpha matte, we focus on the other end, to subtly enhance this input so that the…

Computer Vision and Pattern Recognition · Computer Science 2022-08-16 Yangyang Xu Zeyang Zhou , Shengfeng He

Proactive defense methods protect portrait images from unauthorized editing or talking face generation (TFG) by introducing pixel-level protective perturbations, and have already attracted increasing attention for privacy protection. In…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Ruiqing Sun , Xingshan Yao , Zhijing Wu , Tian Lan , Chenhao Cui , Huiyang Zhao , Jialing Shi , Chen Yang , Xianling Mao

Hand-crafted image quality metrics, such as PSNR and SSIM, are commonly used to evaluate model privacy risk under reconstruction attacks. Under these metrics, reconstructed images that are determined to resemble the original one generally…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Xiaoxiao Sun , Nidham Gazagnadou , Vivek Sharma , Lingjuan Lyu , Hongdong Li , Liang Zheng

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

Existing portrait matting methods either require auxiliary inputs that are costly to obtain or involve multiple stages that are computationally expensive, making them less suitable for real-time applications. In this work, we present a…

Computer Vision and Pattern Recognition · Computer Science 2022-03-21 Zhanghan Ke , Jiayu Sun , Kaican Li , Qiong Yan , Rynson W. H. Lau

We present a method for generating alpha mattes using a limited data source. We pretrain a novel transformerbased model (StyleMatte) on portrait datasets. We utilize this model to provide image-mask pairs for the StyleGAN3-based network…

Computer Vision and Pattern Recognition · Computer Science 2023-05-24 Sergej Chicherin , Karen Efremyan

Deep networks trained on millions of facial images are believed to be closely approaching human-level performance in face recognition. However, open world face recognition still remains a challenge. Although, 3D face recognition has an…

Computer Vision and Pattern Recognition · Computer Science 2020-12-03 Syed Zulqarnain Gilani , Ajmal Mian

Generally, privacy-enhancing face recognition systems are designed to offer permanent protection of face embeddings. Recently, so-called soft-biometric privacy-enhancement approaches have been introduced with the aim of canceling…

Computer Vision and Pattern Recognition · Computer Science 2023-10-05 Daile Osorio-Roig , Paul A. Gerlitz , Christian Rathgeb , Christoph Busch

Image matting refers to predicting the alpha values of unknown foreground areas from natural images. Prior methods have focused on propagating alpha values from known to unknown regions. However, not all natural images have a specifically…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Huanqia Cai , Fanglei Xue , Lele Xu , Lili Guo