Vision Based Hand Gesture Interfaces for Wearable Computing and ...

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Chapter 8. Hand Gestures in Application Tunnel Tool selects a volume from the entire field of view and displays it in a different manner than its surroundings. The tool is apparent to the viewer as a bluish plane that occludes the real world and occupies a part of the screen. It can “see through walls” and visualize occluded objects in front of the bluish plane. It can also filter dense and overlapping data sets and present them in the form of visually more informative data slices. We fixed the cutout volume’s position with respect to the user’s viewpoint because initial experiments showed no gain from relocating it off the center of the view axis. The three dimensional layout of the Tunnel Tool that creates this impression is shown in Figure 8.8. Users can take 3D snapshots of the virtual environment and the current view of the real world. Virtual objects that can be placed in the virtual environment improve expressiveness by allowing for realistic visual annotations. This helps with explaining the location and relation of real and virtual objects to other people, for example, to someone who has to mount a piece of hardware to a wall in a certain way. 8.7.3 Speech recognition We use a prototype automatic speech recognition library (ASRlib), provided to us by the Panasonic Speech Technology Laboratory. ASRlib is targeted to- wards computationally very efficient, speaker-independent recognition of simple 229
Chapter 8. Hand Gestures in Application Figure 8.8: Schematic view of the Tunnel Tool: only objects inside the Focus Region are rendered in full. Objects that fall within the Context Region are rendered as wireframes. Objects to either side of the apparent tunnel are rendered in their normal fashion. The drawing is courtesy of Ryan Bane. 230
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UNIVERSITY OF CALIFORNIA Santa Barb
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Vision Based Hand Gesture Interface
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Acknowledgements You would not hold
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Education Curriculum Vitæ Mathias
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The dissertation’s main contribut
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Die Beiträge dieser Dissertation d
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Contents Acknowledgements v Curricu
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4.2.9 The vision conductor configur
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List of Figures 2.1 The rectangular
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Chapter 1. Introduction interfaces
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