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College University Designing CCTV Systems with a 3D CAD
College University Designing CCTV Systems with a 3D CAD
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Designing CCTV Systems with a 3D CAD |
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A video surveillance system can be quite costly so it is wise to have a level of understanding as to what the system is capable of achieving. The best point to start at is defining what you want the system for. That may appear obvious but there are 4 main criterias we define a camera as being for.
A video surveillance system can be quite costly so it is wise to have a level of understanding as to what the system is capable of achieving. The best point to start at is defining what you want the system for. That may appear obvious but there are 4 main criterias we define a camera as being for. 1. Observe the what is happening in an area 2. Detect the presence of people in a scene 3. Recognise a person you know 4. Identify a person you don't know Many people want to identify a customer, watch staff theft and overview an area with one security camera, which is 3 of the above definitions. In nearly all applications two or more cameras will be required to achieve this. One for ID and others for overview and staff. Failure to recognize this is why we see so much poor quality footage on TV. Using a 3D CAD assists you in determining the best surveillance camera, resolution, height and lens selection before you buy any equipment and find it does not do the job. In part 1 of the following video, we look at the basic steps to add a background from a map or floor plan, get an accurate scale, start to place cameras allowing us to get a good idea of what the camera will see. V:0 The second part explains the above four coverage definitions and how to set the pixel/metre ratio for each. Once set, we can see from the shaded coloured areas as to where in the scene you will achieve each level. I:2:P The tools to create 3D objects, walls and people are also shown in this section V:1 You will find how to test the scene with different megapixel resolution cameras in part 3 as well as the impact electronic zoom has on the actual usable resolution of an image. Unlike on TV where we zoom in 800% and still have a great image, the real world would not give great results. V:2 If you are looking for a more comprehensive understanding of video surveillance and how to design a quality CCTV system, have a look at the tutorials at CCTV Design. You will also find information on Australian Standards and legalisation's. About the Author: Frank Cole Tim's articles have taught me so much more about what makes a good CCTV system design. I would recommend you read his articles around the CCTV forums Bill Groves |
Home College University Designing CCTV Systems with a 3D CAD
College University Designing CCTV Systems with a 3D CAD
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