DSpace Kolekce: poster paper procceedings
http://hdl.handle.net/11025/857
poster paper procceedings2024-03-28T19:56:55ZA Multimodal User Interface Component for an Augmented Reality Mobile User Guidance System
http://hdl.handle.net/11025/15437
Název: A Multimodal User Interface Component for an Augmented Reality Mobile User Guidance System
Autoři: Thum, Marco; Demiris, Thanos; Müller, Stefan
Editoři: Skala, Václav
Abstrakt: In general, user interfaces should be intuitive, self-explanatory and adaptive to various user skills. Especially in augmented reality systems with complex interaction possibilities simple concepts are necessary to guide the user. Therefore, we extend the ideas of the traditional WIMP metaphor (Windows, Icons, Menus, Pointer) with the capabilities of multimodal interfaces where multiple ”human” communication channels are used as input data for navigation, orientation and interaction. In this work we will present the adaption of the user interface of an existing mobile augmented reality system for cultural heritage to multimodal interaction. We present the concepts that led us to the decision for the use of speech and capturing of hand movements by means of an inertial tracker, as well as the implementation aspects of the initial prototype. User evaluation trials will prove our approach.2006-01-01T00:00:00ZThum, MarcoDemiris, ThanosMüller, StefanA probabilistic approach for object recognition in a real 3-D office environment
http://hdl.handle.net/11025/879
Název: A probabilistic approach for object recognition in a real 3-D office environment
Autoři: Wünstel, Michael; Röfer, Thomas
Editoři: Skala, Václav
Abstrakt: The scenario used focuses on object recognition in an office environment scene with the goal of classifying
office equipment that is located on a table. The recognition system operates on three-dimensional point-clouds
of objects on a loosely covered table where no previous information about the precise position of the table is
given. As the point-clouds do not cover the complete objects and the data is noisy, especially for smaller objects
a robust detection of special features is difficult.
The workflow employed is a three step process: In a first step the table plane is detected and the point clouds of
the objects are extracted from the surface. In the second step an object-oriented bounding-box is calculated to
get the geometric dimensions, i.e. the properties measured. During a learning phase these simple features are
used to calculate the parameters of Bayesian networks. The trained networks are used in the third step, i.e. the
classification step. The dimensions of an unknown object form the input for a Bayesian network that yields the
most probable object type.2006-01-01T00:00:00ZWünstel, MichaelRöfer, ThomasAutomatic control point segmentation and localization for online camera calibration
http://hdl.handle.net/11025/878
Název: Automatic control point segmentation and localization for online camera calibration
Autoři: Yuan, Chunrong
Editoři: Skala, Václav
Abstrakt: Camera calibration is an essential step for 3D object recognition and reconstruction. In this work, we propose a
novel method for the automatic localization of control points and present a simple and yet robust online camera
calibration system. First a planar calibration pattern with circular control points is designed. These points are then
automatically segmented and localized by integrating information resulted from two complementary
segmentation methods: region extraction and contour detection. After the calibration pattern has been shown to
the system at a few locations, both the intrinsic and extrinsic camera parameters can be determined. The main
advantage of this approach is that the metric measurement of the calibration pattern in the image plane is done
purely automatically. We have implemented the whole system on a windows platform. Tests with USB cameras
in different configurations and applications show the efficiency as well as the accuracy of the proposed approach.2006-01-01T00:00:00ZYuan, ChunrongA simple anti-aliasing method for straight line drawing based on DSP platform
http://hdl.handle.net/11025/877
Název: A simple anti-aliasing method for straight line drawing based on DSP platform
Autoři: Wang, Dusheng; Toh, Hock Lye; Chen, Xiang; Yang, Fan
Editoři: Skala, Václav
Abstrakt: A simple and practical anti-aliasing method for a color straight line drawing is presented in this paper. The
method has been applied in a DSP-based display system to remove the undesired jaggies occurred in the line
drawing. The experimental results show that this method can produce a good visual effect on the low
resolution display screen.2006-01-01T00:00:00ZWang, DushengToh, Hock LyeChen, XiangYang, Fan