WorldCat Identities

Travis, Adrian

Works: 3 works in 3 publications in 2 languages and 6 library holdings
Roles: Author, Other
Publication Timeline
Most widely held works by Adrian Travis
Military vehicles : 300 of the most effective forms of military transport by Adrian Travis( Book )

1 edition published in 2003 in English and held by 4 WorldCat member libraries worldwide

Techniques d'interaction, affichage personnalisé et reconstruction de surfaces pour la réalité augmentée spatiale by Brett Ridel( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

This thesis extends the field of spatial augmented reality (SAR). Spatial augmented reality allows to improve or modify the perception of the reality with virtual information displayed directly in the real world, using video-projection. Many fields such as tourism, entertainment, education, medicine, industry or cultural heritage may benefit from it. Recent computer science techniques allow to measure, analyse and visualise the geometry of the surface of real objects, as for instance archeological artefacts. We propose a SAR interaction and visualisation technique that combines the advantages of the study of both real and 3D archeological artefacts. Thus, we superimpose on the object an expressive rendering based on curvatures with SAR, allowing for example to show details of engravings. Next, we simulate the use of a flashlight with the help of a 6-degree-of-freedom controller. The user can then specify the area on the object to be augmented and adjust the various necessary parameters of the expressive rendering. One of the main caracteristics of SAR is to enable multiple users to simultaneously participate to the same experience. However, depending on the target application, this can be seen as a drawback. We propose a new display device that allows to create experiences in SAR that are both multi-user and personalised by taking into account the user point of view. In order to do so, the projection display, set in front of the object to augment, is made from a material that is both retro-reflective and semi-transparent. We suggest two different uses of this new device, as well as two scenarios of application. Most of recent tracking solutions, even with the knowledge of the geometry of the object beforehand, fail when applied to the augmentation of deformable objects. In order to adress this issue, we propose a reconstruction technique for developable surfaces using parabolic-cylinders based on MLS. This kind of surface may represent cloth or fabric for instance. We show a solution addressing approximation issues in areas where the problem becomes ambiguous
Paper No 13.2: Experimenting with Backlights( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Abstract: The conventional LCD was designed around fluorescent backlights but bright LEDs make different compromises possible. A suitably designed light-guide lets us collimate the light then diffuse it over a precise range of angles, eliminating waste. There is the potential to scan the direction of collimation in the horizontal so that light is always concentrated to the head of the user, but users also move in the vertical and forward and back. I will discuss more advanced backlight concepts, which would let us concentrate rays into the users' eyes whatever their position, thus eliminating unseen light and reducing the optical power budget to near zero
Audience Level
Audience Level
  Kids General Special  
Audience level: 0.75 (from 0.66 for Military v ... to 0.96 for Military v ...)

Associated Subjects