How to find the height of person from RGB image when he raises the hand above the head?

I am working on thermal images. In this,I have to find the height of person for calibration. The case in which person raises hand above the head.

[Image Analyst]

OK, good luck with your project.

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer