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Autor     George Papagiannakis, Gurminder Singh, Nadia Magnenat-Thalmann
Titel    A survey of mobile and wireless technologies for augmented reality systems
Zeitschrift    Computer Animation and Virtual Worlds
Ausgabe    19 (1)
Datum    Februar 2008
Seiten    3–22
Anmerkung    URL führt nur zu Preprint, Dokumentation bezieht sich auf die offizielle Version von Wiley (siehe DOI)
DOI    10.1002/cav.221
URL    http://www.miralab.ch/repository/papers/486.pdf
Fragmente    7


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In order to register, or align, virtual information with the physical objects, AR requires accurate position and orientation tracking. AR requires very accurate position and orientation tracking in order to align, or register, virtual information with the physical objects that are to be annotated.
Anmerkungen

(Papagiannakis et al. wiederum haben diesen - und viele weitere Sätze von Höllerers Buchkapitel "Mobile Augmented Reality" (2004) wörtlich übernommen.

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The increasing availability of video cameras in today’s computer devices has led to their use as means for tracking the position and orientation of a user as described by Klein in more detail [112].

[112] Klein, G., and Murray, D. Parallel tracking and mapping for small AR workspaces. In 6th IEEE and ACM International Symposium on Mixed and Augmented Reality, 2007. ISMAR 2007 (2007), pp. 1–10.

However, the low cost of video cameras and the increasing availability of video capture capabilities in off-the-shelf PCs has inspired substantial research into the use of video cameras as means for tracking the position and orientation of a user (Klein 57).

[57] Klein G. Visual tracking for augmented reality. University of Cambridge, PhD Thesis, 2006.

Anmerkungen

Der Autor übernimmt eine Formulierung von Papagiannakis, tauscht die Quelle aber aus. Die vom Autor referenzierte Quelle behandelt allerdings nicht das Tracken von Benutzern, sondern von Arbeitsplätzen (ohne explizites Tracking von Benutzern).

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Our goal is to place them into different [categories so that it becomes easier to understand the state of the art and to help to identify new directions of research.] Our goal is to place them into different categories so that it becomes easier to understand the state of art and to help identify new directions of research.
Anmerkungen

Wörtliche Übernahme aus dem Abstract von Papagiannakis et al. 2007

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[Our goal is to place them into different] categories so that it becomes easier to understand the state of the art and to help to identify new directions of research. Our goal is to place them into different categories so that it becomes easier to understand the state of art and to help identify new directions of research.
Anmerkungen
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UMPCs are basically small mobile PCs running standard operation systems. A number of researchers have started employing them in AR simulations such as Wagner et al. [235], Newman et al. [154]. At this times the most popular UMPCs for AR was the Sony Vaio U70 and UX180, as well as Samsung Q1. Elmqvist et al. [57] have employed the wearable computer Xybernaut Mobile Assistant, which, although shares some common characteristics with UMPCs, does not belong in the UMPC category. UMPCs are basically small mobile PCs running Microsoft Windows XP. A number of researchers have started employing them in AR simulations such as Wagner and Schmalstieg,17 Newman et al.,23 and specifically the Sony VaioTM U70 and UX180, as well as SamsungTM Q1. Elmqvist et al.24 have employed the XybernautTM Mobile Assistant, which, although shares some common characteristics with UMPCs, does not belong in the UMPC category.
Anmerkungen

Der Autor übernimmt die Beschreibung und alle weiterführenden Quellen von Papagiannakis et al. Auch der Grammatikfehler im letzten Satz ("although shares") wird übernommen.

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Before the recent introduction of UMPCs or cell phones with CPUs of significant computing power, PDAs were the only true mobile alternative for AR researchers. PDAs now have enhanced color displays, wireless connectivity, web-browser and GPS system. A number of computational issues made the use of older PDAs for AR difficult, primarily the lack of dedicated 3D capability and the lack of a floating point computational unit. However, some researchers were able to use the PDA for AR with some success. Wagner et al. demonstrated the Invisible Train [232], which used PDAs as handheld displays for AR applications (see figure 2.7). Makri et al. [133] allowed for a custom-made connection with a special micro-optical display as an HMD.

Smart phones are fully featured high-end cell phones featuring PDA capabilities, so that applications for data processing and connectivity can be installed on them. As the processing capability of smart phones is improving, this enables a new class of AR applications that use the smartphone’s camera for vision based tracking. Notable examples are from Wagner et al. [233], Henrysson et al. [91] and Olwal [160] utilizing them as final mobile AR displays.

Before the recent introduction of UMPCs or SmartPhones with CPUs of significant compute power, personal digital assistants (PDAs) were the only truly mobile alternative for AR researchers. PDAs now have enhanced color displays, wireless connectivity, web-browser, and global positioning system (GPS) system. However, a number of computational issues make their use difficult for AR due to lack of dedicated 3-D capability and floating point computational unit. Goose et al.,25 Reitmayr and Drummond,26 Wagner and Schmalstieg,17 Barakonyi and Schmalstieg,27 Wagner et al.,28 Gausemeier et al.29 have all employed them as handheld display devices for AR applications, whereas Makri et al.30 and Peternier et al.31 allowed for a custom-made connections with a special micro-optical display as an HMD.

[...]

Smartphones are fully featured high-end mobile phones featuring PDA capabilities, so that applications for data-processing and connectivity can be installed on them. Rashid et al.,32 Wagner and Schmalstieg,17 Henrysson et al.,33 Olwal34 utilize them as final mobile AR displays.

[...]

As the processing capability of smartphones is improving, their application use is increasing.

Anmerkungen

Auch hier werden in großem Umfang Beschreibungen und Quellenangaben übernommen.

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The user can then download additional information about a chosen location from the Web, say, the names of businesses in the local shopping center. The user can then download additional information about a chosen location from the Web — say, the names of businesses in the Empire State Building, the cost of visiting the building’s observatories, or hours and menus for its five eateries.
Anmerkungen

Der Autor modifiziert die Beschreibung eines Projektes bei Papagiannakis et al. für seine eigene Beschreibung eines anderen Projektes.

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