This makes calculation of person identification areas and license plate reading areas out of the question. Moving to a three dimension coordinate system the complexity of calculations increases many times, and it is practically impossible to find a good three-dimensional free calculator. But it is still inconvenient to work with a specialized three-dimensional calculator especially when it is necessary to calculate several connected video cameras.
One has to simultaneously use a program-calculator and CAD program, that locates video cameras on the plan, while recalculating and redrawing viewing areas projections in order to get the necessary result. The next step is the integration of a three-dimension calculator and CAD program. The calculator acquires a graphical interface and its calculation results are presented in graphic form.
Obtained graphical calculation results are represented directly on the plan of an object in horizontal and vertical projections. Graphical interface that allows locating video cameras by one mouse click, to raise or lower a video camera only by one turn of a mouse wheel, change its angle of inclination and lens focal length and see the result there and then, makes CCTV systems designing easy and exciting work. These and very many other ideas are realized in full measure in a new program intended for CCTV systems designing.
This program is called VideoCAD. The latest version of VideoCAD 5. Specialized calculations of video surveillance viewing areas, person identification areas, license reading-out areas, detailed representation of objects in different parts of a viewing area, calculation of length and electrical parameters of cables are tightly integrated with traditional CAD interface.
Examining an object, discussing and formulating the list of tasks stated before the CCTV system. Getting of an object plan better in electronic version, but also acceptable on paper. Object plan drawn on paper can be scanned and used in VideoCAD as a background for cameras location. Direct on the background with the help of VideoCAD one can create preliminary camera locations.
During the next visit on the object preliminary cameras location is corrected taking into account possible camera locations, light, different obstacles, possibilities of cables lay out, etc.
Corrections of location are simple and convenient in VideoCAD. All necessary actions are conducted with several mouse clicks. With the help of VideoCAD length and necessary parameters of coaxial and power cables can be calculated.
File containing text with detailed descriptions of all video cameras and cables is produced. On basis of obtained location with marked viewing areas and also with the help of the text file a business proposal is made. Business proposal is sent to the customer for discussion and concordance. During the discussion camera tasks and their locations are specified after which with joint efforts requirements specification is made.
Well, let's say the businessman of this story is called Mark. He is worried about some DVD and Blu-ray theft that occurs inside the store, the idea is that the cameras can prevent or at least reduce the theft problem. Let's ask some questions to clarify what will be best solution for the CCTV project of the movie rental store:. Let the client know that you want to understand his perspective of the problem, so you can design a CCTV project to offer the best solution. It's necessary to understand what Mark wants from his new CCTV system, does he just want to know if there are people in the store corridors without too much detail about those people or to identify exactly who they are?
A CCTV system just to show people around has different specification compared to one with resolution and quality enough to recognize faces. It is very common for the customer to be dissatisfied later when deciding to see the video of an event to try to identify someone's face but the cameras don't have resolution enough.
Believe me, they will blame your for that. Does Mark want to prevent the thefts from occurring or does he want to record the videos for further evidence? Make sure your are offering what the customer wants, if he wants to record everything that's happening to watch the video later, please don't offer him a system for real-time monitoring.
You should listen to what Mark has to say to understand what he has in mind, but don't be alarmed if he says he would to record video for a year. Sometimes this happens because the customer doesn't know that this is not a common situation and that can raise too much the costs.
Or just have the privileges watch live videos? This point is quite critical, many people accessing the system can bring inconveniences, such as using images improperly or even destroying evidence or changing the system configuration.
This can be even dangerous, just imagine if an employee exports a video and upload it to YouTube just because he thinks it's something funny. If Mark wants to access the system remotely, he will need to have the appropriate infrastructure to do so, such as an Internet link and the correct configuration to properly send the videos over the Internet.
Based on the questions you asked Mark, you could start a draft of the project, with a site survey to study the details before proposing a solution. Deciding where the CCTV cameras will be installed is up to you, with the initial questionnaire you have only got an idea of what Mark has in mind, but you must decide where to install them and explain the reasons for that. For the video store, it would be more interesting to use cameras with varifocal lenses to adjust the angle and zoom level, it would also be more interesting to have high resolution cameras to recognize people.
To learn more about cameras read: How Security Cameras Work. We specialize in several industries and we created divisions to tailor specific solutions to those industries.
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