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Re:Show HN: WebcamSwiper - a JS library that watches for han... by kevingadd on Tuesday October 02, 2012 @01:35AM (#4600718)
Same problem here.

For a demo like this where failures can be caused by user error instead of app error, you should consider overlaying a tiny rectangle on screen that shows the webcam captured frames with an overlay of the recognition, so it's easier to tell if it's user error.

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