Generation of Facial Composites

A system for generating facial composites, comprises a processor for processing facial composite data and a display for displaying images constructed from facial composite data. The processor is adapted to implement an interface in which a plurality of facial images are presented to a user, and in response to a user input, including the selection of one best match facial image of the plurality of faces, a further plurality of facial images is presented to the user. A mutation algorithm is used for generating the further plurality of facial images, and which generates facial images corresponding to facial composites which vary from the facial composite of the best match facial image in dependence on a random control parameter. The facial composite comprises a vector having a plurality of terms, and each term is assigned a probability of mutating. The random control parameter determines which vector terms are altered. This provides an efficient representation of multiple choice facial images.