Caslon Analytics elephant logo title for Automatic Number Plate Recognition note
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section heading icon     studies of ANPR

This page points to studies about use and misuse of ANPR technology in Australia and elsewhere.

It covers -

subsection heading icon     introduction 

There has been no major work offering non-specialist readers a comprehensive view of the technical basis of automatic number plate recognition systems, the use (or misuse) of that data on a day by day basis, legal frameworks and civil society concerns.

Overall the non-IT literature is thin, with much of the detailed discussion being restricted to official reports and treatment in works on pervasive surveillance or the 'smart city' often occurring in passing rather than as a discrete detailed evaluation.

That may remain the case, given creeping adoption of ANPR and use by government rather than the private sector, with consumer angst instead focusing on vehicle RFID schemes and mining of data from public/private CCTV networks.

subsection heading icon     sorting 


In the interim pointers to literature on privacy aspects of ANPR and CCTV are here and here.

For ANPR as part of 'intelligent environments' see Terrorism, Risk and the City: The Making of a Contemporary Urban Landscape (Aldershot: Ashgate 2003) by Jon Coaffee, GIS & Crime Mapping (New York: Wiley 2005) by Spencer Chainey & Jerry Ratcliffe, Ground Truth: The Social Implications of Geographic Information Systems (New York: Guilford 1997) edited by John Pickles, Geographic Information Science: Mastering the Legal Issues (Milton: Wiley 2005) by George Cho and Intelligent Environments: Spatial Aspects of the Information Revolution (Amsterdam: North Holland 1997) edited by Peter Droege. Other works on GIS are here.

Studies on law enforcement and privacy aspects include Benjamin Goold's CCTV and Policing: Public Area Surveillance and Police Practices in Britain (Oxford: Clarendon Press 2004), Surveillance and Security: Technological Politics and Power in Everyday Life (London: Routledge 2006) edited by Torin Monahan, Theorizing Surveillance: The Panopticon And Beyond (Cullompton: Willan 2006) edited by David Lyon and The New Politics of Surveillance and Visibility (Toronto: Uni of Toronto Press 2006) edited by Kevin Haggerty & Richard Ericson. A brief view of UK developments is provided in 'Road watch (Automatic number plate recognition system)' by C. Evans-Pughe in 1 Engineering & Technology 4 (2006), 36-39. It is complemented by J Malenstein's 'Status of European Efforts on Digital Enforcement, Using ITS and Future Trends' (PDF).

subsection heading icon     congestion charging 

For use of ANPR in congestion charging in urban centres see Jonathan Leape's 2006 'The London Congestion Charge' in 20 Journal of Economic Perspectives 4, Stephen Ison's Road User Charging: Issues And Policies (Aldershot: Ashgate 2004) and Georgina Santos' Road Pricing, Volume 9: Theory and Evidence (Research in Transportation Economics) (London: JAI Press 2001).

subsection heading icon     technology 

For non-specialists much of the the technical literature is dauntingly hermetic, concerned with pattern recognition and systems integration.

Points of entry include Vladimir Shapiro, Georgi Gluhchev & Dimo Dimov's 2006 'Towards a Multinational Car License Plate Recognition System' in 17 Machine Vision & Applications 3; Hsi-Jian Lee, Si-Yuan Chen & Shen-Zheng Wang's 2004 'Extraction and recognition of license plates of motorcycles and vehicles on highways' in Proceedings of the 17th International Conference on Pattern Recognition and C Anagnostopoulos, I Anagnostopoulos, V Loumos & E Kayafas' 2004 'A License Plate-Recognition Algorithm for Intelligent Transportation System Applications' in 7 IEEE Transactions on Intelligent Transportation Systems 3.

subsection heading icon     law 


As mentioned earlier in this note there is little case law and statute law specific to ANPR regimes.

Most of the case law and academic literature concerns -

  • traditional administration of vehicle licensing (eg penalities for obscured or absent plates)
  • questions such as free speech (eg the legality of requirements that African-Americans and other people in some US states use plates that feature a Confederate flag or monstrosities such as the personalised Zyklon B plate)
  • the use of conventional speed cameras.

Academic literature on ANPR and privacy includes Dorothy Glancy's 2004 'Privacy on the Open Road' in 30 Ohio Northern University Law Review 295, Christopher Slobogin's 2002 'Public Privacy: Camera Surveillance of Public Places and the Right To Anonymity' in 72 Mississippi Law Journal 213, Marc Blitz's 2004 'Video Surveillance and the Constitution of Public Space: Fitting The Fourth Amendment To A World That Tracks Image And Identity' in 82 Texas Law Review 1349 and the provocative 2006 'How's My Driving? For Everyone (And Everything?)' by Lior Strahilevitz in 81 New York University Law Review 1699.

Insights regarding imaging, profiling and radar guns in the US are provided in Thomas Stanek's 1998 'Photo Radar in Arizona: Is It Constitutional?' in 30 Arizona State Law Journal 1209-42 and Darlene Cedrés' 1997 'Mobile Data Terminals and Random License Plate Checks: The Need For Uniform Guidelines and a Reasonable Suspicion Requirement' in 23 Rutgers Computer & Technology Law Journal 391. Fred Simpson's 2006 'Never Obscure Your Own 'Starry Night'' in 44 Houston Lawyer 49 notes recent debate about obscuring plates

Works on Australian vehicle registration, speed and other requirements include Malcolm Britts' Traffic Law (NSW) (Pyrmont: LawBook 2005).


 



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