SepSchlegel

Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

Filter Framework for DWARF

Motivation

Augmented Reality is a technology which deals with a lot of spatial calculations. There are coordinate transformations to be done, scaling of objects, translations of object to other places in space. Other non geometric calculations are for example the speed of an object, or the barycenter of two or more points. There are various kinds of such calculations.

These calculations are often concatenated. An example for this is a translation after a coordinate transformation. These chains of calculations happen quite often.

At the moment each application and service in DWARF implements its own algorithms. This is unnecessary and error-prone. It is better to have a well tested basic set of calculations. So it is obvious to make these calculations more general and find a way to connect these calculations to a network.

By implementing these calculations into several DWARF services we meet the distributed approach of the DWARF framework. The services can be distributed on many workstations and so even a small wearable device can handle big applications. Another advantage of implementing these algorithms into services is, that they don't have to be implemented in an other programming language.

This was not done in the past, because the was no common way to implement an algorithm in a service. The developer had to implement a DWARF service from scratch, which can be annoying.

Goals

The purpose of this project is to design and implement a framework, so new calculations can be easily implemented and reused by other projects. To reach this goal a plugin based architecture is chosen.

The second part of this project is the concrete implementation of a set of common filter plugin servicesc, such as rotation, translation, speed calculation and other general basic functionality. The concept of designing filter as services was introduced to DWARF with the CAR project.

As a spin-off this project discusses also how CORBA events can be handled in the DWARF environment, without lots of performance losses. CORBA events are needed for the information flow of the services.

-- MichaelSchlegel - 15 Feb 2005

ProjectForm
Title: Filter Framework for DWARF
Abstract: At the moment each application and service in DWARF implements its own algorithms. This is unnecessary and error-prone. It is better to have a well tested basic set of calculations. So it is obvious to make these calculations more general and find a way to connect these calculations to a network.
Student: Michael Schlegel
Director: Gudrun Klinker
Supervisor: Marcus Tönnis
Type: SEP
Area:  
Status: finished
Start: 2004/10/01
Finish: 2005/04/01


Edit | Attach | Refresh | Diffs | More | Revision r1.8 - 28 Nov 2008 - 10:45 - MarcusToennis