Example 23 Choosing install location for PTZ camera
Example 23 Choosing install location for PTZ camera |
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Example 23 Choosing install location for PTZ camera |
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Problem
We have a three-dimensional model of a complex environment. We should choose the best install location for PTZ (dome) camera so that the areas you want to monitor, should be not shaded by objects of the environment.
Order of work
1. Construct three-dimensional model of the environment using the tools of 3D modeling.
The constructions must be drawn by line types with marked Shadow box.
You can import the environment or its fragments in the form of one or several 3D models imported from other graphics formats using 3ds max.
See: Import of 3D models and scenes from 3ds max to VideoCAD
Through the 3ds max you can import 3D models from Google SketchUp. See: Importing 3D models from Google SketchUp
If the environment contains 3D models, shadows from which must be taken into account, you must:
| • | enable calculation of shadows from 3D models in the Options box; |
| • | individually switch these 3D models into the editing state by double-clicking, then mark the Shadow box on the Current construction parameter panel. |
2. Place the PTZ camera preliminary. Activate it.
3. Choose Dome 
in the drop-down menu of the Shadow 
button on the Tool bar.
After a while VideoCAD calculates the control area projection, taking into account shadowing from all obstacles in environment.
In the Dome mode all shaded areas from the specified camera position become visible.
The Dome mode is also useful for choosing the best installation place for fixed cameras to make required areas reachable for the cameras. |
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4. By moving the camera between the possible installation locations, choose the best location in terms of control required areas.
You can add several cameras and instead of moving, to hide and show different cameras.
