Hand detection

beginners
#1

Hi, I am new to kinect. I want to make something of this sort-
http://jamcnaughton.wordpress.com/2012/08/06/kinect-and-tuio/
But using of_v0.8.0 and ofxKinect on my 64-bit Ubuntu machine.
I started with hand detection by making appropriate changes in this code : https://github.com/openframeworks/ofSite/blob/master/-documentation/addons/ofxOpenCv/ofxCvContourFinder.markdown
I am taking input from Kinect. This method is working fine, but not that good! Can you please suggest an alternative and also if you could tell me if I am heading in the right direction?

#2

Hi

you dont need to look for a hand, you can do other ways:

  • using ofxkinect you can set an near and far treshold and look for something that cross this area and this will be a hand, later get the centroid of that blob and done

  • using ofxopenni you can use the “hand generator” to track hand position

look for a hand shape and finger position purely in opencv i thinnk that ist too much complicated and it force the user to have the palm oriented to the camera.

hope that helps

#3

Thank you so much for replying! I think this is https://github.com/roymacdonald/ofxOpenNI/blob/master/src/ofxHandGenerator.cpp what you are talking about! I really can’t say much about ofxKinect as I have just run that point cloud example, I have installed all the necessary drivers and lib needed for openframeworks + libfreenect. But if you say that ofxopenni has better method to offer then I may switch to it! What should I do?

#4

i dont want to say that one method is better than other. It depends a lot of what you want to do with that.

The most simple i think that it will be the ofxkinect method, you can search for ofxkinect examples that do that thing.

#5

ok I’ll look for such examples! Your reply really helped me in having a clear idea of what to choose from. Thank you so much for helping me!