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In the paper, we present ViViSnoop, a novel video-assisted keystroke inference attack which snoops the victim user's typed input without visually seeing it. Instead, it infers the typed input from the vibration extracted from the video capturing the desk where the physical or virtual keyboard is placed. ViViSnoop is built on the fact that keystrokes on the desk incur mechanical vibrations which are...
This study proposes a concept for multithread active vision sensing that can measure dynamically changing displacement and vibration at multiple points on civil engineering structures. In multithread active vision sensing, a high-speed camera can function virtually as multiple tracking cameras by accelerating its measurement, computation, and actuation with ultrafast viewpoint switching at millisecond...
This paper presents a novel methodology of calculating an object's frequency of vibration autonomously using a camera and mechanism of optical strobing. The camera used has a frame rate of 30 fps and therefore, in the conventional fashion, it is unable to capture meaningful information about any vibration frequency higher than that. Therefore, we utilize the strobing concept with an illumination frequency...
Automated Teller Machines (ATMs) security is the field of study that aims at solutions that provide multiple points of protection against physical and electronic theft from ATMs and protecting their installations. From anti-skimming defend systems to silent indicate systems, integrated ATM video surveillance cameras and ATM monitoring options, security specialists are ready to help the people get...
There has been an increasing interest in sensing angular micro motion, ranging from personal tremor in the medical applications to sensitive vibration platform for surveillance in the defense applications. Sensing micro angular motion is a challenging task though because of the requirement of high accuracy. In addition, the motion is small which results in weak sensor signals. Hence, this paper proposes...
In this paper we present a low cost navigation system, called ARIANNA, primarily designed for visually impaired people. ARIANNA (pAth Recognition for Indoor Assisted NavigatioN with Augmented perception) permits to find some points of interests in an indoor environment by following a path painted or sticked on the floor. The path is detected by the camera of the smartphone which also generates a vibration...
Different type of vibrations are inherent in helicopters which cause discomfort to the crew, structural fatigue and other problems which may lead to accidents. Vertical vibrations are due to the out of track conditions i.e. the blades of the helicopter being out of track. The objective of this research work is to minimize the vertical vibrations by improving the blade tracking using image processing...
Information systems that build on sensor networks often process data produced by measuring physical properties. These data can serve in the acquisition of knowledge for real-world situations that are of interest to information services and, ultimately, to people. Such systems face a common challenge, namely the considerable gap between the data produced by measurement and the abstract terminology...
This paper presents a comprehensive navigation system to assist the visually impaired in safely walking in their living areas. The system can provide the visually impaired vibrotactile hints of navigation and free directions during outdoor walking. The cluttered environmental information is acquired by Kinect cameras and ultrasonic sensors in real time. All the direction and obstacle avoidance instructions...
The release of the Microsoft Kinect has attracted the attention of researchers in a variety of computer science domains. Even though this device is still relatively new, its recent applications have shown some promising results in terms of replacing current conventional methods like the stereo-camera for robotics navigation, multi-camera system for motion detection and laser scanner for 3D reconstruction...
Pushbroom sensors are widely used for earth observation from space; this camera captures 1-D image and uses straight motion of the satellite to build a 2-D image. Yet, attitude variations of the satellite during the aquisition process can lead to significant distortions in the 2-D image. Current solutions use inertial sensors to record attitude variations and correct images, but they are expensive...
To improve the performance and the efficiency of Laser Doppler Vibrometers (LDVs) for long-range hearing, we design an active multimodal sensing platform that integrates a Pan-Tilt-Zoom (PTZ) camera, a mirror and a Pan-Tilt-Unit (PTU) to the LDV. With the assistance of the vision and active control components, the LDV can automatically select the best reflective surfaces, point the laser beam to the...
Linear pushbroom cameras are widely used in passive remote sensing from space as they provide high resolution images. In earth observation applications, where several pushbroom sensors are mounted in a single focal plane, small dynamic disturbances of the satellite's orientation lead to noticeable geometrical distortions in the images. In this paper, we present a global method to estimate those disturbances,...
This paper presents the multimodal interaction scheme (visual and audio) used by the Tyflos prototype. Tyflos is a wearable prototype that provides reading and navigating assistance for visually impaired users. In particular, the Tyflos prototype integrates a wireless portable computer, cameras, range and GPS sensors, microphones, natural language processor, text-to-speech device, an ear speaker,...
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