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In order to get the most out of using the QuickCam intra-oral camera in the XVa3® application, you must first install the QuickCam extension. The QuickCam extension installation can be found at XVa3’s upgrade web site at http://www.apteryxware.com/xva/downloads. To install the extension, download and run the QuickCamUpg file from the component updates section.
Once you have downloaded and run the QuickCam extension upgrade, you need to let XVa3 know that it should use the QuickCam real-time video capture instead of the default real-time video capture (which does not support the various extra features that the QuickCam camera provides). To select which video device type is to be used to capture images, please refer to HOWTO: Specifying The Real-Time Video Device.
Even though you can still capture images from the QuickCam using a standard real-time video source, the standard Real-Time Video extension does not support switching between automatic and manual focusing modes, hardware supported non-interlaced video signals, automatic image mirroring or white balance.
One big difference between the RTV and the QuickCam extensions is the
functionality that is associated with a foot pedal. In
the RTV extension, the user has the ability to assign different functions
to each of the foot pedal buttons (i.e. capture, retake, quit, etc.).
In QuickCam,
the foot pedal is used to automatically switch between manual and auto
focus modes as well as control the focus when in manual focus mode. To
switch to manual focus mode, simply press one of the foot pedals (the
current focus mode is displayed on the QuickCam dialog). While
in manual mode, the left and right foot pedals can be used to move between
macro and micro focusing. To
switch from manual mode back into auto focus mode, simply double-click
one of the foot pedals.
While the standard foot pedals can be used to manually focus the QuickCam camera, the foot pedal that comes with the QuickCam system (the foot pedal that plugs directly into the video card) is used to actually capture an image.
The user should be aware of the following when using the QuickCam system:
The QuickCam does not support all video capture sizes. If you try to capture an image but nothing is returned from the video hardware, it is quite possibly due to an unsupported video size. Should you encounter this phenomenon, try selecting a different video size under the Video Format option in the Video Options menu and then retry the operation. The default settings that you should try from the Video Format and Video Source options in the Video Options menu is NTSC-US and 640x480.
The QuickCam driver does not always support full screen preview. Due to this size restriction, you may display the real-time video in full-screen, but the actual video may only be displayed in a portion of the screen.
The BT878 video driver can only capture images in the 734x538 to 768x568 size range.
