Tarik Elamsy

Al Ain University · College of Engineering

This paper presents a simple, yet effective, method to recover the affine structure of a scene from a (stereo) pair of stationary zooming cameras. The proposed method solely relies on point correspondences across images and no knowledge about the scene whatsoever is required. Our method exploits implicit properties of the projective camera matrices...

This paper proposes a new method for the automatic identification of parallel planes form uncalibrated images of a scene. First, we demonstrate that, given a priori knowledge about a single pair of parallel planes, it is possible to identify all other parallel planes from uncalibrated images of a scene. Then, we show that a pair of parallel virtual...

In this paper, we propose a method that combines plane parallelism and the Mendonça/Cipolla self-calibration constraints. In our method each pair of images is treated independently and can therefore use a different pair of parallel planes not necessarily visible in the other views. While, for each pair of images, constraints on the singular values...

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We propose in this work a practical method to compute the Euclidean (metric) 3D reconstruction of a scene, observed by a stereo pair of static, off-the-shelf, zooming cameras. The proposed method does not assume any form of explicit, pattern-based, calibration. The stereo system acquires a set of pairs of images, at different zooming levels, making...

In UAE, environmental issues are considered as very crucial at all levels. This study attempts to analyze the current data available on the Ozone Layer in UAE via different data mining techniques. The study aims at giving a general idea about the Ozone Layer in UAE and generates some general rules that will help maintaining the future of Ground Ozo...

Automatic license plate recognition (ALPR) is the process of locating and extracting vehicles plate information from images or videos. The extracted information is essential for several everyday applications, ranging from automated payment services (e.g. parking and toll roads payment collection) to more critical applications, like border crossing...

Abstract This paper proposes a new method for self-calibrating a set of stationary non-rotating zooming cameras. This is a realistic configuration, usually encountered in surveillance systems, in which each zooming camera is physically attached to a static structure (wall, ceiling, robot, or tripod). In particular, a linear, yet effective, method t...

The flooding zone initialization protocol (FZIP) was proposed as a mechanism to provide power efficient flooding for real-time multimedia data over wireless sensor networks (WSNs). FZIP can initialize different FZ sizes with different performance levels (i.e. loss rate, latency, and overhead). Increasing the FZ size increases redundancy which in tu...

Flooding protocols have shown to be failure resilient and robust in transporting data over multi-hop wireless networks, e.g. wireless sensor networks and ad hoc networks. However, flooding protocols are considered to be less efficient in power consumption compared to unicast based protocols. In this paper, we present our Flooding Zone Initializatio...

User management is a vital problem to be solved when constructing a Webportal for accessing grid resources. Most current approaches treat web and grid users separately. This is inconvenient to the system users. This paper presents a user management framework that combines the two kinds of user management. It also supports Single Sign- On and federa...