Single-shot structured light methods allow 3D reconstruction of dynamic scenes. However, such methods lose spatial resolution and perform poorly around depth discontinuities. Previous single-shot ...methods project the same pattern repeatedly; thereby spatial resolution is reduced even if the scene is static or has slowly moving parts. We present a structured light system using a sequence of shifted stripe patterns that is decodable both spatially and temporally. By default, our method allows single-shot 3D reconstruction with any of our projected patterns by using spatial windows. Moreover, the sequence is designed so as to progressively improve the reconstruction quality around depth discontinuities by using temporal windows.
Our method enables motion-aware reconstruction for each pixel: The best spatio-temporal window is automatically selected depending on the scene structure, motion, and the number of available images. This significantly reduces the number of pixels around discontinuities where depth cannot be recovered in traditional approaches. Our decoding scheme extends the adaptive window matching commonly used in stereo by incorporating temporal windows with 1D spatial windows. We demonstrate the advantages of our approach for a variety of scenarios including thin structures, dynamic scenes, and scenes containing both static and dynamic regions.
Energy consumption is a key issue in wireless body area network (WBAN) since the wearable sensor devices are severely resource-constrained. In this paper, we present a novel transmission power ...control scheme, which exploit the regular body motion in dynamic wireless channel for WBAN. We first investigate the relationship between the link state and body movement with experiment, and give the evidence that the path loss is strongly related to the body movement. We then propose the motion aware transmission power control (M-TPC) scheme which takes advantage of the information from activity recognition algorithm and arranges transmission when the transmitter is at the desire location. Finally, we implement and evaluate the proposed scheme on ZigBee platform with CC2530 radio, and also compare with the real-time reactive scheme in walking scenario. The experimental results show that the M-TPC scheme reduces transmission power by 43.27% and enhances the link reliability by reducing the packet loss rate by 75%.
Existing applications leveraging on Wireless Body Area Network (WBAN) technologies face several technical challenges and difficulties to support desirable data reliability and real-time performance ...visualization. So we designed and developed a testbed with integrated hardware and software solution aiming to enhance data reliability and provide performance visualization of WBAN. In this demo, we showcase our current works of improved hardware platform design and development, on-body wireless channel modeling and empirical network profiling, energy-efficient and reliable routing protocol, motion-aware reliability enhancement scheme and visualization of real-time WBAN operations. We will demonstrate the proposed reliability control, dynamic routing protocol and real-time visualization implementations using indoor fitness monitoring scenario.
This paper presents a smart glasses-augmented, wearable input device based on a wristband-type, motion-aware touch panel. With this novel input device, a user can manipulate the smart glasses' ...augmented reality (AR) system by selecting and moving contents via touching and dragging, as well as scrolling, navigating, and controlling 3D objects by rotating the wrist. The proposed device can be used in an AR environment to select and manipulate virtual 2D and 3D content. The proposed interface offers the following advantages: 1) the touch screen panel helps users to control the smart glasses' AR system accurately, without any limitations of gesture and speech recognition systems; environmental noise and distortion, and multi-leveled pattern recognition task; 2) the motion of the wrist increases the Degrees of Freedom (DOF) of the system - the combination with 2 DOF of touch interaction allows accurate 3 DOF interaction and various ways of interacting, enabling users to carry out tasks via a Head-Mounted Display (HMD) quickly and intuitively; and 3) the simple hardware composition allows the device to be easily embedded into existing devices such as smart watches.
ROBIN: Activity based robot management system Wilde, Adriana G; Bruegger, Pascal; Hadorn, Benjamin ...
2010 International Conference on User Science and Engineering (i-USEr),
2010-Dec.
Conference Proceeding
Open access
This paper examines the design and implementation of a system to support firefighting exercises based on tools and ideas of pervasive computing. Through this development a range of technologies and ...conceptual tools were used, such as sensors, wireless communication, and the programming framework uMove; as well as context-awareness, situation management, and activity detection. In this development, the notion of implicit human-computer interaction was of particular relevance. The use of a programming framework for interaction through motion was central, and this implementation is one of its proofs of concept, as it presented opportunities to improve it and recommendations to adapt it for future applications.
This paper deals with motion as a component of the context in a context-aware system. It presents a uniform approach to incorporate motion awareness at the middleware level. The proposed approach is ...independent from the nature of the spatial location representation used. Consequently, it can be used at different levels of spatial abstractions. Furthermore, the paper shows how to integrate motion-awareness into the framework for location aware modelling (FLAME) assuming the Region Connection Calculus (RCC8) spatial primitives.
PDF
