Track centroid of frames acquired from webcam using matlab

I am acquiring frames from web cam and i need to track my hand in the frames. I guess simply tracking the centroid would help me track it. How do I do it? If simply finding centroid won't help, what is the other way?

[Walter Roberson]

Why not find the centroid, remembering the previous centroid as well so you can track?

Answer 1

[Image Analyst]

The Computer Vision System Toolbox has tracking capabilities. Look into it. http://www.mathworks.com/products/computer-vision/description5.html

Answer 2

[ravi]

you can use skin color, vally points between fingers to detect hand in image