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Visualization > WebCams > About the viewing frustrum
About the viewing frustum
When you look into a WebCam, your scope of vision is limited by the WebCam's viewing frustum.The viewing frustum determines what the WebCam sees. It is in the shape of a truncated pyramid. Only objects inside this pyramid are visible to the WebCam. The viewing frustum is defined by the near plane distance, the far plane distance, and the vertical FOV angle.
Adjusting the FOV is similar to changing the lens on the WebCam. In the following illustrations, the WebCam and the tower stay put, but the FOV angle is changed.
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