20141023

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This document outlines three studies on mid-air word-gesture keyboards (WGK) and flexible bending interactions for projected handheld displays. Study 1 explores the potential of a WGK for mid-air input. Study 2 examines touch and gesture recall without visual feedback. Flexpad is introduced as a highly flexible bending interaction technique for projected handheld displays, along with three example applications that utilize Flexpad.

Technology

Study 1
THE POTENTIAL OF A WGK IN MID-AIR

Flexpad
Highly Flexible Bending Interactionsfor Projected Handheld Displays

FlexPad is a system that enables interaction with highly flexible projected displays using deformation. It captures the detailed pose and deformation of a flexible surface in real-time using depth data from a Kinect camera. This allows for applications like exploring volumetric data by slicing through it or animating virtual paper characters. The system tracks deformation accurately even during folding and steep bending, though it has limitations for very sharp bends or folds. An evaluation found the tracking performs well during realistic tasks and users can easily interact with the flexible displays. Future work could explore touch input, active flexible displays, and programmable smart materials.

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Wi-Vi or wireless vision is one of the most modern technologies which use wireless fidelity or Wi-Fi as the core principle. Basically, it deals with tracking and manipulation of Wi-Fi signals. Wi-Vi is used to image the obstacles or solids behind any wall or obstructions. The most important advantage of this is it is completely wireless and no cables or wires are used. Hence it becomes more suitable for usage in mobile devices and other lightweight technologies. Wireless facility also allows it to use in armed force and other security agencies. As we know that SOANR and RADAR uses the principle of transmission and reflected waves, the Wi-Vi which uses the same principle can be called as an adaptation of those. But it also posses several differences and simpler apparatus. We will see those modifications on the coming pages of the paper.

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Want similar presentation ideas? Interact and follow me in Quora : https://www.quora.com/profile/Liju-Thomas-13 or Connect with me through Facebook : http://www.facebook.com /lijuthomas24 Researchers have always tried to build a device capable of seeing people through walls. However, previous efforts to develop such a system have involved the use of expensive and bulky radar technology that uses a part of the electromagnetic spectrum only available to the military. Now a system is being developed by Dina Katabi and Fadel Adib, could give all of us the ability to spot people in different rooms using low-cost Wi-Fi technology. The device is low-power, portable and simple enough for anyone to use, to give people the ability to see through walls and closed doors. The system, called “Wi-Vi,” stands for "Wi-Fi" and "vision." is based on a concept similar to radar and sonar imaging. But in contrast to radar and sonar, it transmits a low-power Wi-Fi signal and uses its reflections to track moving humans. It can do so even if the humans are in closed rooms or hiding behind a wall. Simple definition for Wi-Vi is, as a Wi-Fi signal is transmitted at a wall, a portion of the signal penetrates through it, reflecting off any humans on the other side. However, only a tiny fraction of the signal makes it through to the other room, with the rest being reflected by the wall, or by other objects. Wi-Vi cancels out all these other reflections, and keeps only those from the moving human body. Previous work demonstrated that the subtle reflections of wireless inter signals bouncing off a human could be used to track that person's movements, but those previous experiments either required that a wireless router was already in the room of the person being tracked. Wi-Fi signals and recent advances in MIMO communications are used to build a device that can capture the motion of humans behind a wall and in closed rooms. Law enforcement personnel can use the device to avoid walking into an ambush, and minimize casualties in standoffs and hostage situations. Emergency responders can use it to see through rubble and collapsed structures. Ordinary users can leverage the device for gaming, intrusion detection, privacy-enhanced monitoring of children and elderly, or personal security when stepping into dark alleys and unknown places. The concept underlying seeing through opaque obstacles is similar to radar and sonar imaging. Specifically, when faced with a non-metallic wall, a fraction of the RF signal would traverse the wall, reflect off objects and humans, and come back imprinted with a signature of what is inside a closed room. By capturing these reflections, we can image objects behind a wall. Wi-Vi is a see-through-wall technology that is low-bandwidth, low-power, compact, and accessible to non-military entities. Wi-Vi is a see-through-wall device that employs Wi-Fi signals in the 2.4 GHz ISM band.

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Fingerprints have been used for identification since 1882. There are three main fingerprint patterns: loops, whorls, and arches. Loops make up 65% of fingerprints, whorls 30%, and arches 5%. Fingerprints are identified by features called minutiae including bifurcations, endings, and cores. There are two main techniques for fingerprint matching: minutiae-based which matches placement of minutiae points, and correlation-based which can overcome difficulties of minutiae-based matching. Fingerprints are captured using either optical or capacitive sensors and processed using image algorithms. Fingerprint identification has advantages of high accuracy, economy, and standardization but disadvantages of potential intrusiveness and errors from dirty or

20141218

20141023

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