123,519 research outputs found
Melbourne University Press Author Portraits
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/71561These photographs are of authors published at some stage by Melbourne University Press, and were taken for the purposes of furnishing author pictures on the covers of titles published by the Press.114553
Series: [2003.0130] "Melbourne University Press Author Portraits
Video stylization for digital ambient displays of home movies
No full textFalling hardware costs have prompted an explosion in casual video capture by domestic users. Yet, this video is infrequently accessed post-capture and often lies dormant on users’ PCs. We present a system to breathe life into home video repositories, drawing upon artistic stylization to create a “Digital Ambient Display” that automatically selects, stylizes and transitions between videos in a semantically meaningful sequence. We present a novel algorithm based on multi-label graph cut for segmenting video into temporally coherent region maps. These maps are used to both stylize video into cartoons and paintings, and measure visual similarity between frames for smooth sequence transitions. We demonstrate coherent segmentation and stylization over a variety of home videos
HCI and innovation
No full textThe user-centered design (UCD) process in HCI has recently been criticized for not delivering breakthrough innovations in technology. In this paper we consider this critique through a literature review and two case studies of innovation. Our conclusions suggest that there is nothing wrong with the attitude of usercentered design which has probably been present in all major innovations down the centuries. Rather, the practice of UCD in HCI lacks attention to business factors and long term uptake of technology in society. This compromises its impact on products and should be incorporated into the study of HCI itself
Empathic painting
No full textWe present the "empathie painting" - an interactive painterly rendering whose appearance adapts in real time to reflect the perceived emotional state of the viewer. The empathie painting is an experiment into the feasibility of using high level control parameters (namely, emotional state) to replace the plethora of low-level constraints users must typically set to affect the output of artistic rendering algorithms. We describe a suite of Computer Vision algorithms capable of recognising users' facial expressions through the detection of facial action units derived from the FACS scheme. Action units are mapped to vectors within a continuous 2D space representing emotional state, from which we in turn derive a continuous mapping to the style parameters of a simple but fast segmentation-based painterly rendering algorithm. The result is a digital canvas capable of smoothly varying its painterly style at approximately 4 frames per second, providing a novel user interactive experience using only commodity hardware
Dynamic shot suggestion filtering for home video based on user performance
No full textThis paper presents novel additions to our existing amateur media creation framework. The framework provides at-capture guidance to enable the home movie maker to realize their aesthetic and narrative goals and automation of post-production editing. A common problem with the amateur filming context is its contingent nature, which often results in the failure to gain footage vital to the user's goals, even with at-capture software embedding. Accordingly, we have modelled minimizing the difference between target and captured footage at a given time during filming as a probability distribution divergence problem. We apply two policies of feedback to the user on their performance, passive communication via a suggestion desirability measure, and active filtering of undesirable suggestions. We demonstrate the framework using each policy with a simulation of various user and filming situations with promising results
Enhanced wireless roaming security using three-party authentication and tunnels
No full textMany organizations and many home users have deployed WiFi networks permitting external users to connect to the Internet through their networks. Such WiFi sharing poses many security risks for the visited network as well as for the visiting user. In this paper, we focus on the recently introduced con- cept for tunneled WiFi roaming in which the infrastructure of the visited network is considered as part of the security architecture. A secure layer-2 tunneling between the user's device and his home network is performed by the visited network only after the successful authentication of all three parties. The authentication protocol provides the mobile device and its home network with a secret key that protects their end-to-end communication. Additionally, it provides another tunnel key, shared with the visited network, that protects the actual traffic exchanged between the visited and home networks and prevents diverse resource consumption attacks against the latter. This concept encourages users to provide roaming service in a more secure and privacy- friendly way. We show how to implement this concept using the IEEE802.11i/EAP framework, based on existing infras- tructures and standard tunneling protocols
Democratic group signatures
No full textWe propose a novel group-oriented signature scheme, called a democratic group signature (DGS). In DGS the scheme setting is controlled on a contributory basis, i.e., without any centralized trusted authority (group manager). Group members agree on a common tracing trapdoor, i.e., every member can trace issued signatures individually. Members are able to sign on behalf of the group while remaining anonymous only to third parties. DGS supports dynamic changes of the group formation (joins and leaves of members). For security reasons the tracing trapdoor is updated after every dynamic change. The DGS model results from strong changes to the standard model of group signatures caused by elimination of the group manager's role and distribution of the tracing rights to individuals
Authenticated wireless roaming via tunnels
No full textIn wireless roaming a mobile device obtains a service from some foreign network while being registered for the similar service at its own home network. However, recent proposals try to keep the service provider role behind the home network and let the foreign network create a tunnel connection through which all service requests of the mobile device are sent to and answered directly by the home network. Such Wireless Roaming via Tunnels (WRT) offers several (security) benefits but states also new security challenges on authentication and key establishment, as the goal is not only to protect the end-to-end communication between the tunnel peers but also the tunnel itself. In this paper we formally specify mutual authentication and key establishment goals for WRT and propose an efficient and provably secure protocol that can be used to secure such roaming session. Additionally, we describe some modular protocol extensions to address resistance against DoS attacks, anonymity of the mobile device and unlinkability of its roaming sessions, as well as the accounting claims of the foreign network in commercial scenarios
A mixed digital / physical snapshot of early internet / web usage in New Zealand
No full textWe are in the early stages of developing a unique physical and digital record of New Zealand's early experience of the Internet
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