I would say it is perspective dependent. But let's also cosider lens angle and what follows thereof. I study the case of taking the picture from an angle - not straight.
Hans used iPhone - having one I know that it has wide-angle lens - thus you can/must come quite close to headstock to get a picture that fills the screen. Therefore the relative distance between closet and futhest point can be 2x. When you use narrow lens angle - you must back off to make object fit on screen - from that follows that the distance difference from same angle will be reduced relatively.
To demonstrate - I took two pictures of the same 2G memory chip - one from close distance - one from further out - same angle - then I zoomed them to be about same size on my screen and took a screenshot.
At quick look one might think that picture on left was taken more from upright - but they both are about the same angle - right is a close-up - left is from distance and zoomed in.