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Sentiment analysis of online user generated content is important for many social media analytics tasks. Researchers have largely relied on textual sentiment analysis to develop systems to predict political elections, measure economic…

Computer Vision and Pattern Recognition · Computer Science 2015-09-22 Quanzeng You , Jiebo Luo , Hailin Jin , Jianchao Yang

Video-based person re-identification (re-ID) is an important technique in visual surveillance systems which aims to match video snippets of people captured by different cameras. Existing methods are mostly based on convolutional neural…

Computer Vision and Pattern Recognition · Computer Science 2021-12-14 Di Chen , Andreas Doering , Shanshan Zhang , Jian Yang , Juergen Gall , Bernt Schiele

This work proposes and analyzes the use of keystroke biometrics for content de-anonymization. Fake news have become a powerful tool to manipulate public opinion, especially during major events. In particular, the massive spread of fake news…

Cryptography and Security · Computer Science 2020-05-19 Aythami Morales , Alejandro Acien , Julian Fierrez , John V. Monaco , Ruben Tolosana , Ruben Vera-Rodriguez , Javier Ortega-Garcia

Air-writing refers to virtually writing linguistic characters through hand gestures in three-dimensional space with six degrees of freedom. This paper proposes a generic video camera-aided convolutional neural network (CNN) based…

Computer Vision and Pattern Recognition · Computer Science 2025-02-19 Prasun Roy , Subhankar Ghosh , Umapada Pal

This paper proposes a novel scheme to identify the authorship of a document based on handwritten input word images of an individual. Our approach is text-independent and does not place any restrictions on the size of the input word images…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Vineet Kumar , Suresh Sundaram

Most keystroke dynamics studies have been evaluated using a specific kind of dataset in which users type an imposed login and password. Moreover, these studies are optimistics since most of them use different acquisition protocols, private…

Machine Learning · Computer Science 2012-07-04 Romain Giot , Mohamad El-Abed , Christophe Rosenberger

Keystroke dynamics is a behavioral biometric that captures an individual's typing patterns for authentication and security applications. This paper presents a comparative analysis of keystroke authentication models using Gaussian Mixture…

Cryptography and Security · Computer Science 2025-02-25 Soykat Amin , Cristian Di Iorio

This work targets people identification in video based on the way they walk (i.e. gait). While classical methods typically derive gait signatures from sequences of binary silhouettes, in this work we explore the use of convolutional neural…

Computer Vision and Pattern Recognition · Computer Science 2016-06-15 F. M. Castro , M. J. Marin-Jimenez , N. Guil , N. Perez de la Blanca

Keystroke Dynamics is an important biometric solution for person authentication. Based upon keystroke dynamics, this paper designs an embedded password protection device, develops an online system, collects two public databases for…

Cryptography and Security · Computer Science 2013-10-17 Juan Liu , Baochang Zhang , Linlin Shen , Jianzhuang Liu , Jason Zhao

In this paper we introduce an ensemble method for convolutional neural network (CNN), called "virtual branching," which can be implemented with nearly no additional parameters and computation on top of standard CNNs. We propose our method…

Computer Vision and Pattern Recognition · Computer Science 2018-03-16 Albert Gong , Qiang Qiu , Guillermo Sapiro

Continuous authentication utilizes automatic recognition of certain user features for seamless and passive authentication without requiring user attention. Such features can be divided into categories of physiological biometrics and…

Cryptography and Security · Computer Science 2022-09-15 Ahmed Fraz Baig , Sigurd Eskeland

Scene text recognition has attracted great interests from the computer vision and pattern recognition community in recent years. State-of-the-art methods use concolutional neural networks (CNNs), recurrent neural networks with long…

Computer Vision and Pattern Recognition · Computer Science 2017-09-07 Fei Yin , Yi-Chao Wu , Xu-Yao Zhang , Cheng-Lin Liu

This paper proposes a portable hardware token for user authentication, it is based on the use of keystroke dynamics to verify users in a bio-metric manner. The proposed approach allows for a multifactor authentication scheme in which users…

Cryptography and Security · Computer Science 2019-09-25 Robert Cockell , Basel Halak

Writer identification due to its widespread application in various fields has gained popularity over the years. In scenarios where optimum handwriting samples are available, whether they be in the form of a single line, a sentence, or an…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Vineet Kumar , Suresh Sundaram

With the widespread of digital environments, reliable authentication and continuous access control has become crucial. It can minimize cyber attacks and prevent frauds, specially those associated with identity theft. A particular interest…

Cryptography and Security · Computer Science 2024-11-12 Matheus Simão , Fabiano Prado , Omar Abdul Wahab , Anderson Avila

Emerging technology demands reliable authentication mechanisms, particularly in interconnected systems. Current systems rely on a single moment of authentication, however continuous authentication systems assess a users identity utilizing a…

Cryptography and Security · Computer Science 2019-03-11 Rasana Manandhar , Shaya Wolf , Mike Borowczak

Given a pedestrian image as a query, the purpose of person re-identification is to identify the correct match from a large collection of gallery images depicting the same person captured by disjoint camera views. The critical challenge is…

Computer Vision and Pattern Recognition · Computer Science 2017-12-05 Lin Wu , Yang Wang

Neural network has been attracting more and more researchers since the past decades. The properties, such as parameter sensitivity, random similarity, learning ability, etc., make it suitable for information protection, such as data…

Multimedia · Computer Science 2007-08-01 Shiguo Lian

Convolutional neural networks (CNNs) tend to become a standard approach to solve a wide array of computer vision problems. Besides important theoretical and practical advances in their design, their success is built on the existence of…

Computer Vision and Pattern Recognition · Computer Science 2015-12-08 Adrian Popescu , Etienne Gadeski , Hervé Le Borgne

In contemporary mobile user authentication systems, verifying user legitimacy has become paramount due to the widespread use of smartphones. Although fingerprint and facial recognition are widely used for mobile authentication, PIN-based…

Cryptography and Security · Computer Science 2024-05-06 Yooshin Kim , Namhyeok Kwon , Donghoon Shin