USB based Webcams usually supports different resolutions for video and very often maximum is 640x480 (VGA). But that resolution is not using in most cases, we use only 320x200 or so for online video conferencing purposes, because 640x480 is too big for real-time video over the Internet. That allows do zooming and moving camera. CamZoomer is a middleware application between Webcam application and real Webcam driver with tilt/pan/zoom features.
||Free to try