This article argues that digital traffic cameras are very well adapted to today's number plate recognition requirements. The latest megaresolution cameras offer accuracy and reduced manpower requirements, both of which are important for modern highway enforcement, even though it may take several years to obtain legal support for such technology. Camera system requirements include: (1) data management; (2) sufficiently high resolution; (3) anti-blooming; (4) contrast latitude; (5) stopping power; (6) sensitivity; (7) image enhancement circuitry; (8) adequate frame rate; (9) installation flexibility; and (10) environmental friendliness. It must be possible to process digitally captured images by automatic algorithms, to: (1) interpret licence numbers; (2) apply data compression to reduce file storage requirements; and (3) carry adequate security locks to prevent tampering with images and associated data after their initial capture. The main value of megaresolution cameras in traffic violation enforcement is their ability to distinguish correctly important items of information within a captured image. Digital imaging technology offers the maximal data processing flexibility, to expand the use of installed cameras as future needs are identified and met. One of the world's most advanced systems was recently installed in Australia.
Abstract