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Papers

The Implementation of The Shrinking Generator

Edmond Lau, April 2001
This paper presents experiences found when building a stream cipher using the shrinking generator algorithm. We will present some strengths founds using this algorithm, and also some weaknesses by giving detail explanations on the cryptanalysis of this cipher. The focus of this paper is on the software implementation of shrinking generator using object-oriented programming language C++. This paper consists of four main parts. First, the background information of stream ciphers. Secondly, the Shrinking Generator algorithm is explained in details with some possible applications as examples. Then we are going to look at some possible attacks of this cipher. The last part of the paper describes experiences achieved from the experiment and the conclusions drawn from this.
[PDF]

The Implementation of Morphological Watershed Segmentation

Edmond Lau, Chris Odorjan, November 2001
This paper describes a general-purpose implementation of the watershed transformation in C/C++ using a lookup table to determine whether regions should be connected. This paper consists of three parts. First, the image preprocessing techniques used in the software implementation. Secondly, the watershed algorithm is explained in detail with some possible applications as examples. In the last part of this paper, the software implementation and the problems faced during the implementation process are examined, and possible solutions for them are discussed.
[PDF]

Game Playing With Genetic Algorithms

Edmond Lau, Chris Odorjan, Richard Voino, April 2002
Genetic algorithms are powerful means for solving many types of artificial intelligence problems. They bring many methods used by nature to evolve creatures suitable for their environment into the realm of computer learning. This paper describes a simple game resembling hockey or soccer that can be used to test the feasibility of a genetic algorithm to adapt rule-based agents to their environment using computer-based learning.
[PDF]

Implicitization of Polynomial Curves

Ilias Kotsireas, Edmond Lau, ASCM 2003
In this paper we present an implementation of an implicitization algorithm for curves given by polynomial parametric equations. We also establish some new structural properties of the implicitization matrices used in this algorithm. From a suitable viewpoint the implicitization matrices reveal a Hankel-like structure. Several examples illustrate in detail the implementation and some appealing perspectives for further work are briefly touched upon.
[JPG Poster]

Implicitization of Polynomial Surfaces

Ilias Kotsireas, Edmond Lau, Richard Voino, CASC 2003
In this paper we present an implementation of an implicitization algorithm for surfaces given by polynomial parametric equations. Several examples illustrate in detail the implementation and some appearling perspectives for further work are briefly touched upon.
[JPG Poster]

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