How to find the object length using camera in android
<p>i want to find the object length using camera . I have search a lot and i have found 
relation between distance &amp; view angle.
  Formula  angle= arctan(d/2f)
but i m frustrated and not find any relative code. so please suggest me the working 
code in order to find the object height using camera. if distance from the object is 
know then how to find the object length 
Thanks in advance  </p>
