478 Journal of the Spanish Institute for Strategic Studies N. 5 / 2015 system of classification based on four typologies: a) access control; b) conduct control; c) registering evidence; d) flow control and planning of deployment. Although it is true that these classifications are ideal from an academic perspective, a tactical approach to such systems requires express planning. For this reason, it has been determined that from a strategic perspective they must be classified into three levels: • Preference Interest View (PIV): this refers to those cameras that, due to their location, allow for control of Level 1 reporting lines. This has been attributed to several omnidirectional cameras found at a height of at least 2 metres above ground level, whose purpose is an overall view of the surrounding area. The combination of these devices in a strategic constellation permits visual control of the access and exit points along a predefined urban perimeter. • Secondary Interest View (SIV): within this classification we consider those cameras that serve to support PIV systems with a view to closing off perimeters; as well as those that enable strategic control within those areas where coverage of fields of vision is poor. • Regular Interest View (RIV): this category includes the remaining cameras, which, from a strategic perspective, supply information of little interest. The identification of those who breach delimitations is just as important as delimiting an area itself. By reason of this maxim, it has been considered necessary, from an intelligence perspective or for the sake of seeking judicial proof, to classify installed systems based on their potential functional use. The result is the following: • Facial Recognition Capability (FRC): defined as the combination of the quality of the sensor and the focus in use. This, in turn, may be fixed or variable, whereby zoom is used. This allows for a sharp image of a supposed subject. • Subject Recognition Capability (SRC): the group of systems that enable us to determine the traceability of a subject in an urban environment once the subject has been identified (by clothing, build, etc.). At a specific point in time, supposing that the subject passes such a system at a minimal distance, the cameras above can take on a FRC function. • Tracking Recognition Capability (TRC): these are cameras that due to their potential low quality, allow neither for FRC nor SRC functions; nonetheless, once the subject has been defined, images captured can determine whether he or she has entered into a protected field of vision. • Plate Recognition Capability (PRC): such cameras have been equipped with the requisite capacity for the identification of a vehicle’s number plate. We have also included mobile systems installed within police force patrol vehicles in this section. http://revista.ieee.es/index.php/ieee
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