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Operators in virtual environments have to mostly rely on visual feedback when exploring virtual scenes and objects. If no additional haptic actuators are available then information about surface roughness will not be communicable and thus the degree of immersion will suffer. To compensate for this shortcome the usage of pseudo haptic feedback (Control/ Display ratio = visual cues encoding haptic object...
Traditional teleconferencing multimedia systems are limited to audio and video information. Human touch, in the form of handshake, encouraging pat, comforting hug, among other physical contacts, is fundamental to physical and emotional development. This paper presents the motivation and design of a synchronous haptic teleconferencing system with touch interaction to convey affection and nurture. We...
In this paper we explore the identification of handwritten signatures with haptic information. We enhance our previous work by considering two methods: 1) we filter the incoming haptics information in the handwritten signature, and 2) we further reevaluate the highly probable candidates to enhance the identification success rate. In this paper we reach an identification success rate of 87%.
This paper describes the open and flexible architecture of a stereo vision system prototype, using open source software. The system is designed for teleoperated robots and includes a four degrees of freedom stereo head mechanism, a pair of high performance digital cameras, a head tracker and a head mounted display. All processes for the head control and video streaming are performed in Linux-based...
In this paper, a preliminary study is conducted in order to measure and analyze the perceptibility of a watermarked 3D virtual object when (1) visual feedback is present, and when (2) visual and haptic feedback are simultaneously available. More specifically, our experiments are intended to assess whether looking at, and touching a 3D mesh could in fact improve the perceptibility of a watermark as...
Video matting can be described as a method of extracting the foreground object from each frame of a video and composite (or transfer) it to a different background or a different video. An automatic scribbling approach based on the motion of the foreground object in a video is introduced. Probability maps (PMs) are computed by analysing the motion of object in the video. In the proposed technique the...
In this paper we design and implement an integrated man-machine touch panel interface for an embedded electronic measurement system (EEMS). The interface module of our EEMS includes general electronic measurement instruments such as a waveform generator, an oscilloscope and a power supply. We integrate three man-machine interfaces into one window which works in cooperation with the touch panel. The...
In this paper, we design an enhanced human-computer speech interface by wavelet transform. By using a new thresholding algorithm and shrink function, we improve the efficiency of the speech interface. This shrink function tries to decrease sharp time-frequency spectrogram discontinuities by attenuating the wavelet coefficients instead of setting them to zero. This attenuation will be done regarding...
This paper describes a set of PHP based tools created to develop applications for instrumentation remote control through Web browsers. These tools include a PHP module for GPIB (general purpose interface bus) control in a Win32 platform and a set of PHP classes that make easier the creation of GUIs in Web browsers for instrument control and data visualization. The Web AJAX technology allows asynchronous...
We discuss the design and implementation of a distributed, real-time visualization-based disaster recovery tool. In this paper, we focus on metrics used in our system. We discuss how multiple sources of information are fused and visualized featuring the capture and visualization of corresponding uncertainty metrics. We also discuss metrics related to the communication module of our disaster recovery...
Web based virtual reality application has been widely used in education, virtual conferences, entertainment. Observing the progress of the gaming industry over the years can clearly show the advancement in virtual reality Web application and virtual environments. In this paper, we propose a novel Web based e-learning application design approach that uses discrete event system specification (DEVS)...
Web interfaces to automated, device-driven health monitoring systems are necessary to narrow and to bridge the quality gap between physiological observation and semiological interpretation. When designed according to metrology principles, such interfaces are useful in overcoming the measurement and data quality problems created by the lack of safety science in health care and the associated cost of...
Nowadays more and more measurement applications where sensor nodes cooperate to realize a data fusion process are entrusted to wireless sensor networks (WSN). Data fusion to be accurate requires that nodes be referred to a common clock and among themselves. In this scenario node synchronization got a crucial research topic and even sophisticated synchronization algorithms can be easily found in literature...
Target tracking is one of the popular applications of wireless sensor networks (WSN). Randomly distributed sensor nodes(motes) in environment gather spatio-temporal information about target(s) and send them to a sink node for further processing. Motes like personal computers use low cost crystal based clocks. In order to maintain synchronization accuracy to acceptable levels, we shall need to synchronize...
This work presents the features of a exible realtime 3D graphics engine aimed at the development of multimedia applications and collaborative virtual environments. The engine, called EnCIMA (engine for collaborative and immersive multimedia applications), enables a quick development process of applications by providing a high level interface, which has been implemented using the C++ object-oriented...
Environmental monitoring requires that raw data acquired from sensors and/or data repositories be transformed, by scientific analysis, into assessments of current ecosystem conditions and in evolution trends in time and space. The huge data amount produced by different sources, the complexity of the environmental models adopted and the necessary distributed collaboration between scientists and government...
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