Glossary

Aspect

The direction in which a face is facing; in my model, this is comprised of rotations on the X, Y and Z axes.

Chromosome

Any potential solution in the technique of genetic algorithms. In this case, a facial expression would be represented as a chromosome.

Crossover

In the technique of genetic algorithms, the operation of dividing two chromosomes (the ``parents'') into pieces, which are then spliced together, alternating between parents, to form a new chromosome.

Facial model

A system for encoding facial expressions, especially in a uniform, structured fashion.

Genetic algorithms

A searching technique which is based on the biological process of evolution.

Operator

1) A function which, when invoked by the user, performs a transformation on the facial expression pool. 2) A procedure or function in the PostScript language.