Perception - Visual Cues And Constancies Flashcards
What are visual cues?
Features of the environment that give us information about movement, distance, etc.
What are visual constancies?
Seeing objects as the same despite seeing them from different angles and distances.
What are binocular depth cues
Cues that are only detected when both eyes are used
What are monocular depth cues
Cues that can be detected with one eye
What are the two binocular depth cues
Retinal disparity
Convergence
What is retinal disparity
Each eye sees things differently as they are positioned on the face about 6 cm apart. The difference between the left and right eye’s view which the brain receives to give information about depth and distance.
What is convergence
The eyes become closer together (converge) when objects are close to us.
Muscles round our eyes work harder when objects are close. This information is sent to the brain to give information about depth and distance.
What are the four monocular depth cues
Height in plane
Relative size
Occlusion
Linear perspective
What is height in plane
Objects that are higher up in the visual field are further away.
What is relative size
Smaller objects in the visual field are further away.
What is occlusion
Objects that are in front of others are closer to us whilst objects behind other objects seem further away.
What is linear perspective
When parallel lines converge in the distance, the point at which they come together is perceived to be further away.
