ROTAKIN is an industry-standard to evaluate and certify the sight before handover.
CCTV Evaluation Requirement
A standard accepted technical test procedure must be used to be able to evaluate the performance of a CCTV system prior to handover and evaluate the system performance during security audits during warrantee and maintenance phase. The initial and routine tests will be used to ascertain degradation and the need for maintenance.
Common problems will be identified e.g.:
- The subject is too small;
- The images of moving subjects are blurred and contain no detail;
- There is insufficient light on the subject;
- The image is out of focus;
- The target is not seen clearly or is not in view for long enough, or at all!
The internationally accepted DIGIKIN standard, extended out of the ROTAKIN standard, as per SANS 10222-5-1-4 is extensively used around the world to allow standardisation of test procedures and specifications to allow for good practise and installations that meet the client’s expectations.
- Benefits of a standard test procedure
A standard test procedure to enable the performance of a CCTV system to be assessed prior to hand-over, and checked during security audits and after maintenance.
A means to carry out routine tests to ascertain degradation and identify the need for maintenance.
A means to detect and point out weak points in order to educate and train staff as to the performance and limitations of their system
A means of track record on system performance a devaluation over a period of time
- Rotakin/Digikin as the standard
A principal aim of the DIGIKIN is to allow standardisation of test procedures and specifications, which can be written into contracts and thus improve CCTV installations giving you the owner a return on your investment as your CCTV will be enhanced as a deterrent and be an effective part of your security strategy. What is needed is a clearly defined set of standards and test procedures for inclusion in specifications.
The DIGIKIN test standard can then be applied as the acceptance test to identify any problems at an early stage.
- Test Results
- Act as a reference for future tests;
- Educate and train staff;
- Make assessments of what information observers can actually see using the system;
- Identify areas needing change to a prospective contractor;
- Evaluate the effect of system modifications, maintenance, etc;
- Identify maintenance needs;
- Carry out appraisals of new equipment offerings;
- Inform management that the system is working correctly or to support a bid for new expenditure.
- It can be used to carry out post-maintenance testing to ensure that repairs or adjustments to the system have been completed. This will help ensure that the system is working correctly before it is accepted back into service. This is often a very weak area in many systems.
- DIGIKIN can be used to point out difficulties or limitations, enable the effectiveness of systems to be dramatically improved by adjustments to the equipment, or simply permit a more realistic appreciation of the performance of a system to be made. It also helps to focus the mind on the potential problems of using CCTV and the need for a clearly stated Operational Requirement.
- Acceptance Test Procedure (ATP)
The DIGIKIN test standard will be applied as the acceptance test to identify any problems at an early stage during the commissioning phase. This will ensure:
Requirement (OR) checklist
- Level 1
- Site plans are required which will normally be the layouts provided by the architect/consultants/clients.
- These plans must be marked up with the camera positions
- Level 2
- Level 1
An OR checklist must be completed with a structured series of questions that will ultimately form the clear operational requirement for every camera and subsequently the complete system.
Although most of the camera systems designed to observe human activity, the application can range from crowd control/public safety (movement of large numbers of people over a wide area) to access control (close up, high-quality imagery to identify individuals)
The choice of CCTV camera, in particular, will depend on the nature of the activity to be observed which will be based on the following:
As part of the Operational requirement development and planning, a category, as indicated below, which best reflects the type of activity to be viewed and meets the requirement of the client and consultant, should be selected.
Below the image indicating every category, there is a definition of the expected achievement.
Height based levels of image detail
- Monitor and Detection:
A figure occupies at least 5% to 10% of the screen height and the scene portrayed is not unduly cluttered. From this level of detail an observer should be able to monitor the number, direction and speed of movement of people, providing their presence is known to him; i.e. they do not have to be searched for a target.
The figure now occupies at least 25% of the available screen height. After an alert, an observer would be able to search the display screens and ascertain with a high degree of certainty whether or not a person is present. Useful in areas where it is necessary to monitor a group of individuals such as in a public area, mall or airport.
When the figure occupies at least 50% of screen height viewers can say with a high degree of certainty whether or not an individual shown is the same as someone they have seen before.
With the figure now occupying at least 100% of the screen height, picture quality and detail should be sufficient to enable the identification of an individual to be established beyond a reasonable doubt.
The purpose of these categories is to suggest appropriate image sizes to aim towards when trying to define a minimum standard. It does not necessarily follow that it will be impossible to recognise or identify an individual if the image size is smaller than the 50% or 100% figures suggested. Equally, there is no guarantee that individuals will be identifiable simply because they occupy >100% of the screen. Other factors, such as lighting and angle of view will also have an influence.
It is also vital to inspect recorded images as well due to the fact that the compression process and other settings can lead to a loss of picture detail.
This effective test procedure will be applied to do pre- and post-maintenance testing to ensure that repairs or adjustments were made correctly and ensure the system is working to full required standard.
DIGIKIN will assist in pointing out difficulties or limitations enabling the effectiveness of the system to be improved by adjustment to equipment.
Some of the problems that will be identified for rectification:
- Scene Contrast
- Field of View (FoV)
- Low light level performance
- Image Quality
- Image Resolution
- Placement of camera
- Camera functionality
- Camera alignment
- Lighting conditions
- Picture quality
- Cabling & Power
- Proposed Rotakin/Digikin evaluation periods
|Task||Commissioning||Annually/Bi Annually||After Maintenance||Day/Night|
|Depth of Focus||X||X||X||Selective|