@inproceedings {INPROC-2007-72,
   author = {Mike Eissele and Thomas Ertl},
   title = {{Mobile Navigation and Augmentation utilizing Real-World Text}},
   booktitle = {Proceedings of Mensch und Computer 2007, Workshop on Nomadic and Wearable Computing 2007},
   publisher = {-},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   type = {Conference Paper},
   month = {November},
   year = {2007},
   language = {English},
   cr-category = {I.3 Computer Graphics},
   department = {University of Stuttgart, Institute of Visualisation and Interactive Systems, Visualisation and Interactive Systems},
   abstract = {Mobile, smart devices are already available in everyday life. Most of them
      offer a rich feature set, including camera, GPS antenna, or even WIFI modules.
      Navigation software utilizing GPS to acquire location data became very popular
      on these mobile clients. However, due to hardware restrictions GPS positioning
      cannot be used for indoor scenarios. In contrast, this paper is focused on
      navigation for indoor environments targeting on a low-cost solution, without
      the requirement of additional hardware installations or markers inside
      buildings. A server-based optical character recognition service is used to map
      images containing unique text passages – acquired with a mobile client – to
      additional meta data, e.g. locations or orientation. We also show that
      augmented-reality methods can be used to provide an intuitive presentation and
      interaction system by overlying real- world images with additional informa-tion
      like navigation symbols or internet hyperlinks.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-72&engl=1}
}

@inproceedings {INPROC-2007-71,
   author = {Martin Rotard and Eissele Mike and Raoul van Putten and Thomas Ertl},
   title = {{ZOOMABLE USER INTERFACES IN SCALABLE VECTOR GRAPHICS}},
   booktitle = {Proceedings of Open SVG 2007},
   publisher = {Online},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   type = {Conference Paper},
   month = {November},
   year = {2007},
   language = {German},
   cr-category = {I.3.3 Picture/Image Generation},
   department = {University of Stuttgart, Institute of Visualisation and Interactive Systems, Visualisation and Interactive Systems},
   abstract = {Zoomable user interfaces are an evolutionary outgrowth of graphical user
      interfaces. In this paper we propose a zoomable user interface based on
      Scalable Vector Graphics. Three-level zooming is proposed as a new paradigm to
      combine different zooming functionalities in a common interface and support
      zooming within the window manager. This helps to unify zooming techniques of
      different applications. To meet the demand of efficient and easy navigation on
      a user interface, several novel interaction techniques are shown that further
      support the integration of three-level zooming within the underlying
      presentation system. For mobile small-screen devices, where the benefit of
      zooming user interfaces is even higher, the proposed system can be operated
      with simple pen tap or tap and drag operations. We also present a prototypical
      implementation, which demonstrates how applications based on the SPARK toolkit
      can transparently benefit form the proposed technology.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-71&engl=1}
}

@inproceedings {INPROC-2007-70,
   author = {Martin Krau{\ss} and Mike Eissele and Magnus Strengert},
   title = {{GPU-Based Edge-Directed Image Interpolation}},
   booktitle = {In Image Analysis (Proceedings of SCIA 2007)},
   publisher = {Springer-Verlag},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   series = {Lecture Notes in Computer Science},
   volume = {4522},
   pages = {532--541},
   type = {Conference Paper},
   month = {November},
   year = {2007},
   keywords = {Zoom, GPU, HDTV},
   language = {English},
   cr-category = {I.3.3 Picture/Image Generation},
   department = {University of Stuttgart, Institute of Visualisation and Interactive Systems, Visualisation and Interactive Systems},
   abstract = {The rendering of lower resolution image data on higher resolution displays has
      become a very common task, in particular because of the increasing popularity
      of webcams, camera phones, and low-bandwidth video streaming. Thus, there is a
      strong demand for real-time, highquality image magnification. In this work, we
      suggest to exploit the high performance of programmable graphics processing
      units (GPUs) for an adaptive image magnification method. To this end, we
      propose a GPUfriendly algorithm for image up-sampling by edge-directed image
      interpolation, which avoids ringing artifacts, excessive blurring, and
      staircasing of oblique edges. At the same time it features gray-scale
      invariance, is applicable to color images, and allows for real-time processing
      of full-screen images on today’s GPUs.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-70&engl=1}
}

@inproceedings {INPROC-2007-124,
   author = {Andreas Hub and Stefan Kombrink and Klaus Bosse and Thomas Ertl},
   title = {{Conference Navigation and Communication Assistant for the Deafblind based on Tactile and Acoustically Amplified Augmented Map Informationfor the 14th Deafblind International World Conference}},
   booktitle = {Proceedings of the 14th Deafblind International World Conference (DbI 2007); Perth, Australia, September 25-30, 2007},
   publisher = {Online},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {1--2},
   type = {Conference Paper},
   month = {September},
   year = {2007},
   keywords = {Blind Navigation; Blind Users; Impaired Vision},
   language = {English},
   cr-category = {H.5.2 Information Interfaces and Presentation User Interfaces,
                   K.4.2 Computers and Society Social Issues},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2007-124/INPROC-2007-124.pdf},
   contact = {andreas.hub@vis.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Visualisation and Interactive Systems, Visualisation and Interactive Systems},
   abstract = {We have developed a portable electronic navigation assistant for the deafblind
      that facilitates independent navigation even in new and complex environments,
      such as large conference sites. The device includes a keyboard, loudspeaker and
      small Braille display, allowing deafblind users to communicate with anyone
      capable of typing.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-124&engl=1}
}

@inproceedings {INPROC-2007-123,
   author = {Andreas Hub and Stefan Kombrink and Klaus Bosse and Thomas Ertl},
   title = {{TANIA – A Tactile-Acoustical Navigation and Information Assistant for the 2007 CSUN Conference}},
   booktitle = {Proceedings of the California State University, Northridge Center on Disabilities' 22nd Annual International Technology and Persons with Disabilities Conference (CSUN 2007); March 19-24; Los Angeles,CA, USA},
   address = {Los Angeles},
   publisher = {Online},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {1--4},
   type = {Conference Paper},
   month = {March},
   year = {2007},
   keywords = {Indoor Navigation; Blind Users; Impaired Vision; Mobile Computing},
   language = {English},
   cr-category = {H.5.2 Information Interfaces and Presentation User Interfaces,
                   K.4.2 Computers and Society Social Issues},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2007-123/INPROC-2007-123.pdf},
   contact = {andreas.hub@vis.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Visualisation and Interactive Systems, Visualisation and Interactive Systems},
   abstract = {A navigation assistant based on a tactile-acoustical interface and augmented
      map information is presented, affording blind people real and virtual
      explorations of the 2007 CSUN Conference environment. By tapping on a touch
      screen, hotel layout and conference-related data are provided.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-123&engl=1}
}

@inproceedings {INPROC-2007-122,
   author = {M. Kraus and M. Eissele and M. Strengert},
   title = {{GPU-Based Edge Directed Image Interpolation}},
   booktitle = {Image Analysis (Proceedings of SCIA 2007)},
   publisher = {Springer-Verlag},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   series = {Lecture Notes in Computer Science},
   pages = {532--541},
   type = {Conference Paper},
   month = {January},
   year = {2007},
   language = {German},
   cr-category = {I.3 Computer Graphics},
   department = {University of Stuttgart, Institute of Visualisation and Interactive Systems, Visualisation and Interactive Systems},
   abstract = {The rendering of lower resolution image data on higher resolution displays has
      become a very common task, in particular because of the increasing popularity
      of webcams, camera phones, and low-bandwidth video streaming. Thus, there is a
      strong demand for real-time, highquality image magnification. In this work, we
      suggest to exploit the high performance of programmable graphics processing
      units (GPUs) for an adaptive image magnification method. To this end, we
      propose a GPUfriendly algorithm for image up-sampling by edge-directed image
      interpolation, which avoids ringing artifacts, excessive blurring, and
      staircasing of oblique edges. At the same time it features gray-scale
      invariance, is applicable to color images, and allows for real-time processing
      of full-screen images on todayś{\^o}{\`o}{\`u}s GPUs.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-122&engl=1}
}

@article {ART-2007-20,
   author = {Andreas Hub and Tim Hartter and Stefan Kombrink and Thomas Ertl},
   title = {{Real and virtual explorations of the environment and interactive tracking of movable objects for the blind on the basis of tactile-acoustical maps and 3D environment models}},
   journal = {Disability and Rehabilitation: Assistive Technology},
   address = {London},
   publisher = {Informa Healthcare},
   volume = {3},
   number = {1},
   pages = {57--68},
   type = {Article in Journal},
   month = {May},
   year = {2007},
   doi = {10.1080/17483100701275677},
   language = {English},
   cr-category = {H.5.2 Information Interfaces and Presentation User Interfaces,
                   K.4.2 Computers and Society Social Issues},
   ee = {http://dx.doi.org/10.1080/17483100701275677},
   contact = {andreas.hub@vis.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Visualisation and Interactive Systems, Visualisation and Interactive Systems},
   abstract = {This study describes the development of a multi-functional assistant system for
      the blind which combines localisation, real and virtual navigation within
      modelled environments and the identification and tracking of fixed and movable
      objects.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2007-20&engl=1}
}