The Pixel Density Model together with the Axis pixel counter makes it easier to use the latest technology to design your surveillance system.
Though this is a fairly one-sided view of the complex task of camera selection, it still provides us with some basic guidelines for determining camera properties. Furthermore, the model is very usable and only requires the user to know the figures for the three different operational requirements.
No theoretical model will ever be able to take into account all the factors contributing to image usability and still function as a guideline in the real world, but this model does shed some light on the complex issue of creating a truly purpose-built surveillance system. By providing this method we hope to make it easier for anyone working with video surveillance to work with operational requirements.