The machine vision group is led by Prof. Bob Fisher that researches the transformation of raw signals into a symbolic representation, whether through initial investigation, an intermediate stage or (mainly) a final interpretation of the signal data into human concepts. Currently, the machine vision group is investigating the issue of inobtrusive and anonymous visual monitoring of ageing adults in their own homes. The monitoring is both short term (to detect critical events), and long-term (to detect behavioural changes due to health deterioration). The research considers technological capabilities and user acceptable design.