How to create Haar Cascade (xml) for using with OpenCV?

Question

If you familiar with OpenCV library, you know what is haar cascade image object detection. I mean image object detection like human face or something else. I have haar cascade xml for face detection, but i don't know how to create my own. I want to create Haar Cascade xml to detect simple bright circle light sources (i.e. flashing infrared light from TV remote control).

So, how to create Haar Cascade (xml) for using with OpenCV?

Answer 1

I think this might be helpful:

http://note.sonots.com/SciSoftware/haartraining.html

Answer 2

Found good FAQ http://www.computer-vision-software.com/blog/2009/11/faq-opencv-haartraining/

Answer 3

Check my answer here:

http://stackoverflow.com/questions/2597302/dice-face-value-recognition/2756179#2756179