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need fast webcam for cv

asked 2013-07-14 06:50:49 -0500

hey i need a fast webcam with low latency to do some face tracking in real time.

the best i found so far is the PlayStation 3 eye, but i can't use this cam, because it sits on a to large board that doesn't fit in my apparatus.

does anyone have good experience with an other cam?

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answered 2013-07-15 23:38:58 -0500

Hi, spiegeleye.

The problem with using face tracking in real time, is that it always depends on the quality of the camera, I think your problem is with the processing of the algorithm, this can cause it to slow the video, making you think that the camera is bad or low frames.

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I agree that processing will probably make your system slow, rather then your setup :)

StevenPuttemans gravatar imageStevenPuttemans ( 2013-07-16 07:32:22 -0500 )edit

answered 2013-07-16 07:25:18 -0500

Basically the speed isn't determined by your webcam quality, but by the scene it has to detect in. I talk from experience that any 640x480 pixel webcam, which isn't even HD, can get face tracking done almost realtime without exact problems.

It all comes down to downscaling your search space for candidates? Use limitations on scale space, use background-foreground subtraction, use histogram equalization, ...

However always keep in mind that openCV included face detector as initiator for your tracker isn't a very robust model. It works well when sitting in a constant environment, behind a desk, but it fails rather quickly in a highly changing environment. If you can track using other techniques, like active shape models, which need an allocation of the model phase, then switch to them rather quickly. These can all be implemented realtime.

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Asked: 2013-07-14 06:50:49 -0500

Seen: 260 times

Last updated: Jul 16 '13