Is it possible to measure distance to object with camera?

Question

Is it possible to measure distance to object with phone camera?

I mean, in my application I start the camera, facing the camera to the object (lets say house) and th

Answer 1

One way to achieve this is using the DPI's in your device. You can take a picture and calculate the height. But you'll need another object as a reference and then you will be able to know the problem with this method could be the perspective between the objects