I am new to this issue. I have requirement like this. I am making one application for an optician. He has such requirement that whenever any object [I.E Customer of optician] has come for eye test, on that time his photo should be captured,and after capturing photo, I need to measure distance between camera and object. As it is a part of some calculation of optician. How to measure distance between camera and object,of which image has been captured. Any Algorithm is available for that?
I have checked this issue but not getting what does it say.
If any one knows please guide me.