Computer-generated images are finding their way into many fields; as computer power increases, it becomes economical to use three-dimensional computer graphics in areas such as cinema, television, interactive entertainment (such as ``virtual reality'' games), legal evidence (computerised reenactments of incidents), fashion (computer-generated previews of hairstyles and plastic surgery) and marketing. In many of these applications, it is necessary to render computer-generated humanoid images, that is, images representing the human form; for this, in turn, it is desirable to render realistic and versatile facial expressions.
In my project I have investigated the issues involved in the generation of facial expressions, including the representation of facial expressions in a computer-manipulable form, the combination and modification of these expressions under user control and issues related to the user interface for such a project. I believe that I have found a paradigm which is suitable for the task of generating facial expressions.