From Ametrine Lavender, Hebden Bridge, West Yorkshire, UK
I read your article on using gait to identify people with great interest (19 September, p 36). I am prosopagnosic, or face-blind, along with up to 2 per cent of the population. Some prosopagnosics have been using gait and posture to help us identify people for pretty much all of our lives.
Your article says that gait recognition requires a huge amount of computing power. Maybe law enforcement agencies could employ prosopagnosics alongside or instead of computerised systems?
