Depth Perception

Monocular Cues

Relative Size-If two objects are roughly the same size, the object that looks the largest will be judged as being the closest to the observer. 

For example:All these pool balls are exactly the same size, but the one that we see in the very front appears to be the closest because of the largest size opposed to those in the background.  

Relative Height-This is depth perception in which objects higher in our field of vision are perceived as being further away. 

For example: In this image we see the taller tree further away because it is higher in our field of vision so we perceive the taller tree as being farther away.  

Relative Clarity-This is depth perception when hazy objects appear farther away than sharp, clear objects.

For example:We can recognize the closer objects to us because we can distinctly see the features of the object and as the object losses clarity we can tell that the object is getting further away.

Interposition-This is depth perception when one object partially blocks our view of another, we perceive the object that is blocking the other as being closer.

For example:We can tell that the first statue is the closest because the first statue partially blocks our view of  all the other statues so we can tell that the object that is not being blocked is the closest to the viewer. 

Linear perspective-This is depth perception when, the more the parallel lines converge, the greater their perceived distance.

For example:The parallel line are the two sides of the roads, and the two sides of the road lead all the way back in the picture, this can show us the the more depth perception by the way the lines converge.  

Binocular Cues 

Retinal disparity-This is the way that your left and right eye view slightly different images. 

For example:In the left picture we can see what it is like looking through only your left eye and you can only see trees.In the right picture you can see a different image that you couldn't see with your left eye and that is a house and tress. 
 
Convergence-In order to perceive depth properly, your eyes must move slightly inward or converge. In so doing, people are able to determine if objects are close to them or far away.

For example:In this picture we can see trees far away and close up, as a result of our eye convergence we can perceive depth in the proper way and tell if an object is close to us or far away from us.