Perception Flashcards
What is sensation?
The information that we receive through our senses.
What in our body detects information from the outside world?
Special organs that detect information form the outside world and convert that information into tiny electrical signals.
What is perception?
How we interpret or make sense of the sensory information that we receive.
Why is perception so important?
We would receive a lot more information than we could cope with, if we really paid attention to everything.
What are visual cues?
A type of sensory cue that is processed by the eye.
How do we judge distance?
- We do this using depth cues, they allow us to work out how far or near something is; an important survival tool.
- Using monocular depth cues.
- Using binocular depth cues.
What is a depth cue?
A feature of an image which indicated distance.
What are monocular depth cues?
A way of detecting depth or distance, which will work with just one eye.
What are binocular depth cues?
A way of detecting depth or distance, which requires two eyes in order to work.
What are some monocular depth cues?
- Height in plane.
- Relative size.
- Occlusion.
- Linear perspective.
What is height in plane?
How high the object appears in the image.
How would we use height in plane to judge distance?
Things that are further away often appear to be positioned higher up.
How would you draw height in plane?
What is relative size?
How large an object appears in an image.
How would we use relative size to judge distance?
It decreases as you move away from it and if two objects are similar in size, we perceive the one that casts a smaller retinal image to be farther away
How would you draw relative size?
What is occlusion?
When one object seems to cover part of another object.
How would we use occlusion to judge distance?
Objects that partially block other parts of the scene are perceived to be closer to an observer than the blocked objects.
How would you draw occlusion?
What is linear perspective?
When straight lines are angled so that they would come together at a point on the horizon.
How would we use linear perspective to judge distance?
For instance, when a long stretch of highway is seen by the human eye, the lanes seem to join together on the horizon.
How would you draw linear perspective?
What are some binocular depth cues?
- Convergence.
- Retinal disparity.
What is convergence?
A form of depth perception which uses how eye muscles focus on images.