This paper describes the design, build, automatic self-calibration and evaluation of a 3D Laser sensor using conventional parts. Our goal is to design a system, which is an order of magnitude cheaper than commercial systems, with commensurate performance. In this paper we adopt point cloud “crispness” as the measure of system performance that we wish to optimise. Concretely, we apply the inform...

This work proposes an edge-node multicast overlay to create a tree capable of performing point to multipoint distribution of real time video (i.e., videoconference) with a hard upper bound on end-to-end delay. By moving the tree configuration, replication, and network monitoring to the edge routers instead of end systems, the trees can be constructed using the knowledge of overlay link bandwidt...

We design a bandwidth and latency aware application layer multicast protocol to stream multimedia content. This protocol considers network bandwidth heterogeneity, in which the cluster population is bounded by the capacity of the access point. The cluster range is limited by the end-to-end latency threshold. This protocol achieves high scalability by distributed and local administration. The ap...

This paper describes a method for the automatic self-calibration of a 3D Laser sensor. We wish to acquire crisp point clouds and so we adopt a measure of crispness to capture point cloud quality. We then pose the calibration problem as the task of maximising point cloud quality. Concretely, we use Rényi Quadratic Entropy to measure the degree of organisation of a point cloud. By expressing this...

Wireless Sensor Networks were first used in military missions. They are currently deployed in a wide range of civil applications as a sensor is becoming smaller and production costs are smaller. The main drawback is the energy constraint as it seems impractical to change or recharge the battery. Several applications require an end-to-end reliable data transport with congestion control to achiev...

Due to their constrained nature, wireless sensor networks are often optimised for a specific application domain, for example by designing a custom MAC protocol. However, when several wireless sensor networks are located in close proximity to one another, the performance of the individual networks can be negatively affected as a result of unexpected protocol interactions. The performance impact ...

Automatic mesh-based shape generation is of great interest across a wide range of disciplines, from industrial design to gaming, computer graphics and various other forms of digital art. While most traditional methods focus on primitive based model generation, advances in deep learning made it possible to learn 3-dimensional geometric shape representations in an end-to-end manner. However, most...

Wireless sensor networks (WSNs) keep attracting the attention of researchers due to the newly emerging areas of application fueled by the development of inexpensive sensors and advanced communication technologies. A large group of applications monitoring of pipelines, roads and bridges, as well as recently evolving IoT applications specifically requires linear topology. Compared to traditional ...

As wireless sensor network becomes pervasive, new requirements have been continuously emerged. However, the most of research efforts in wireless sensor network are focused on energy problem since the nodes are usually battery-powered. Among these requirements, real-time communication is one of the big research challenges in wireless sensor networks because most of query messages carry time info...

When classifying point clouds, a large amount of time is devoted to the process of engineering a reliable set of features which are then passed to a classifier of choice. Generally, such features – usually derived from the 3Dcovariance matrix – are computed using the surrounding neighborhood of points. While these features capture local information, the process is usually time-consuming, and re...