n South African Computer Journal - An evaluation of ID : an eigenface based construction system : reviewed article




We report the development and evaluation of a software system for assisting face recall. The system has a user interface that presents whole faces for inspection rather than sectioned features, and witnesses can use it without an expert operator. Witness choices are evaluated through an optimization algorithm, which iteratively narrows an eigenface 'coefficient space'. Experiments and simulations showed the superiority of a customized optimization algorithm over a genetic algorithm, as well as the superiority of an Active Appearance Model (AAM) over bi-linear mapping to a common shape. Empirical evaluations of reconstructions produced by witnesses and experienced users show that the system is capable of rendering near-photographic, recognizable likenesses of faces - however, this is much easier to do when the face memory is well encoded, or in view. Successful reconstruction from memory remains elusive.


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