Motion Perception

Humans are able to perceive motion.  We can tell if an object is coming or going, and not simply getting smaller or larger. For example, when we view a picture of someone walking, we can tell the direction  they are walking and the general speed at which they are walking.

Binocular Cues: Convergence

Binocular cues are involved in depth perception, and involve the use of both of our eyes.  One binocular cue is convergence, which is how much the eyes converge inwards when looking at an object.  The more inwardly the eyes are focused, the closer the object.  For example, when looking at a globe from a closer distance the eyes are more inwardly angled.  When looking at a globe from a farther distance, the eyes are not as sharply angled.

Monocular Cues: Texture Gradient

Texture gradient is the idea that an object's texture is more distinct when it is closer.  From farther away, the same object may appear smoother and more indistinct than it actually is.  For example: a brick wall.  From close up, you can really see all the crevices and rough edges of each brick, but from farther away it looks much more indistinct.

Monocular Cues: Linear Perspective

Linear perspective describes when two parallel lines appear to be converging, even though they are really not.  For example, when looking at a straight road, it appears to be getting narrower.

Closure

We fill in gaps to create a complete and whole object. In this panda picture, parts of the body are not connected, but our minds automatically connect the lines to see the complete shape of the panda.