detecting the x and y co-ordintes of a hand and finger from webcam
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is it possible to detect the x and y co-ordintes of a hand and fingers from webcam?
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Image Analyst
2011-9-25
I suggest you look at the many, many papers on gesture recognition, section 21.4 in: http://iris.usc.edu/Vision-Notes/bibliography/contentspeople.html#Face%20Recognition,%20Detection,%20Tracking,%20Gesture%20Recognition,%20Fingerprints,%20Biometrics There are also papers there on tracking such as this section "21.4.2.4 Hand Tracking for Gestures."
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Walter Roberson
2011-5-10
No, not unless their hands are very unusually shaped such that each finger can be distinguished no matter what the rotation angle of the hand.
For example if I relax my hand and move it freely around, the little finger (5th) is commonly hidden by the middle (3rd) finger, and the 4th finger between them is often only visible as a small sliver of finger tip poking out from underneath the middle (3rd) finger.
You might be able to use two webcams together to resolve this problem.
Note that the web cam will need to be either quite high resolution or focused very carefully on the hand (probably with automatic tracking) in order to be able to reliably distinguish the fingers from each other.
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Walter Roberson
2011-5-23
移动:DGM
2023-12-29
If you need to be able to recognize the individual fingers in each picture and you only have a single point of view, then you cannot do this with visible light.
(I would not rule out possibilities such as using infrared and measuring subtle differences in temperature as the fingers are likely to have different temperatures due to different blood flows because they are different sizes... but I think you are likely to have the same kinds of problems with infrared as you have with visible light.)
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