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This is a quick hack which shows you the view from your webcam, updating ever half-second. There's a simple button for saving images on the main window.
Here's what it looks like:
A sample output image is:
To use this you'll need a Webcam which is supported by the Linux kernel's videodev API.
I use a Philips PWC camera, and it works just fine via /dev/video0
Download from the following URL - most recent version at the top: