Shape Flashcards
V2
Vs V1, cells here generally have larger RFs, and are capable of tuning to illusory contour
V4
Aside from color, important in discriminating between complex shapes.
It’s difficult to detect the general tuning properties of V4 neurons
LOC
Responds stronger to shapes (familiar or not) than to scrambled stimuli
Also responds to shapes defined by second order features
- eg difference in motion that difines an object
IT cortex
Real life object selectivity is very clear in neuron firing, when real hand is shown response is stronger.
Tanaka researched this. Is it a ‘hand tune neuron’? He reduced complex stimulus for essential feature combinations.
Facial recognition
‘Face cells’ in monkeys IT cortex respond to faces. Doenst respond to scrambled face.
Even selective to the orientation or the face
Object constancy
Object recognition is highly viewpoint invariant. We recognize an object no matter what viewpoint it is.