Richard
Baker The
Principal (Acting) City
of
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23 March 2009
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Dear
Mr Baker Facial recognition biometrics
trial at According to the
Cambridge News [1], Ely are testing the use of facial
recognition technology to determine which pupils are on the premises. The business case
in favour of using biometrics depends on the reliability of that technology. We all have confidence
in the expert use of fingerprinting by the police, and in the forensic
use of DNA to identify people. Quite rightly.
Traditional fingerprinting and DNA work. But that is not the technology
being tested at St Neots. Biometrics based on facial recognition have
a long history of not working [2]. Historically, you
should expect this trial to fail – a subject currently being pursued
with the Home Office Scientific Development Branch
[3]. Typically, about 30% of people
cannot be recognised by systems using facial geometry. That is on
the same day that they are registered/enrolled
into the system. Two months later, typically, facial geometry systems
fail to recognise about 60% of people [4]. It is important to run your trial
for at least three months. As an early adopter
of the technology in the education sector, Ely may be offered reduced
rates for acquisition, installation, training and support. But if
the equipment fails to recognise 60% of students after two months,
then the business case fails at any price. Ely is engaged in
a technology trial. The technology may or may not be cheaper than
the daily 90 minutes of a teacher's time that is expected to be saved.
It may or may not make people safer in case of a fire. These matters
cannot be determined in advance. They cannot be prejudged. The school
needs to conduct the trial first to find out. You are quoted as
saying: "As for the students, they
love the idea of taking responsibility for their own registration
and using Please be sceptical,
Mr Baker. Yours sincerely David Moss
[1] Jordan Day, 5 March 2009, Cambridge News, 'Students register delight at new face-fit check-in', http://www.cambridge-news.co.uk/cn_news_home/displayarticle.asp?id=396794 [4] http://dematerialisedid.com/PDFs/feasibility_study031111_v2.pdf,
see para.52(c) |