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PERCEPTION
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PERCEPTION - COGNITION
Is there something wrong?
PERCEPTION
Perception
Identification and interpretation of sensory information
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From the physical stimulus to recognizing information
Shaped by learning, memory, expectation
Cognition
The processing of information, applying knowledge
Hear someone speak: Perception
Understand the language and the words: Cognition
PERCEPTION VS. COGNITION
PERCEPTION COGNITION
Eye, optical nerve, visual Recognizing objects
cortex
Relations between objects
Basic perception
Conclusion drawing
First processing Problem solving
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Not conscious Learning, …
Reflexes
PERCEPTION - COGNITION
WHAT IS THERE
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VS
WHAT DO WE SEE
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Emergence Images
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http://graphics.stanford.edu/~niloy/research/emergence/emergence_image_siga_09.html
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OUR PERCEPTION IS BASED ON PRIORS
We have a model of the world
We try to fit what we see into this model
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lOMoARcPSD| 23136115
lOMoARcPSD| 23136115
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WHO DO YOU SEE?
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OUR EYE
HUMAN VISUAL SYSTEM
Cone cells: for
color vision.
- Dense in the
center. Fovea has
only cone cells
Rods cells: for
black/white
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COLOR VISION
3
types of cone
with different
sensitivity to
-
Red (63%)
-
Green (31%)
-
Blue (6%)
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VISUAL ACUITY
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lOMoARcPSD| 23136115
HUMAN VISUAL SYSTEM
Not similar to a camera
Vision works as sequence of
Fixation: maintaining gaze on
single location (200-600 ms)
Saccades: moving between
different locations (20-100 ms)
HUMAN VISUAL
SYSTEM
No general purpose vision
What we see depends on our goals and
expectations
Relative judgements: strong
Absolute judgments: weak
lOMoARcPSD| 23136115
Ames Room
lOMoARcPSD| 23136115
AMES ROOM

Preview text:

lOMoAR cPSD| 23136115 PERCEPTION lOMoAR cPSD| 23136115 PERCEPTION - COGNITION Is there something wrong? PERCEPTION Perception
• Identification and interpretation of sensory information lOMoAR cPSD| 23136115
• From the physical stimulus to recognizing information
• Shaped by learning, memory, expectation Cognition
• The processing of information, applying knowledge
Hear someone speak: Perception
Understand the language and the words: Cognition
PERCEPTION VS. COGNITION PERCEPTION COGNITION Eye, optical nerve, visual Recognizing objects cortex Relations between objects Basic perception Conclusion drawing First processing Problem solving lOMoAR cPSD| 23136115 Not conscious Learning, … Reflexes PERCEPTION - COGNITION WHAT IS THERE lOMoAR cPSD| 23136115 VS WHAT DO WE SEE lOMoAR cPSD| 23136115 Emergence Images lOMoAR cPSD| 23136115
http://graphics.stanford.edu/~niloy/research/emergence/emergence_image_siga_09.html lOMoAR cPSD| 23136115
OUR PERCEPTION IS BASED ON PRIORS We have a model of the world
We try to fit what we see into this model lOMoAR cPSD| 23136115 lOMoAR cPSD| 23136115 lOMoAR cPSD| 23136115 lOMoAR cPSD| 23136115 WHO DO YOU SEE? lOMoAR cPSD| 23136115 lOMoAR cPSD| 23136115 OUR EYE HUMAN VISUAL SYSTEM Cone cells: for color vision. - Dense in the center. Fovea has only cone cells Rods cells: for black/white lOMoAR cPSD| 23136115 COLOR VISION 3 types of cone with different sensitivity to light: - Red (63%) - Green (31%) - Blue (6%) lOMoAR cPSD| 23136115 VISUAL ACUITY lOMoAR cPSD| 23136115 lOMoAR cPSD| 23136115 HUMAN VISUAL SYSTEM Not similar to a camera Vision works as sequence of
Fixation: maintaining gaze on single location (200-600 ms)
Saccades: moving between
different locations (20-100 ms) HUMAN VISUAL SYSTEM No general purpose vision
What we see depends on our goals and expectations Relative judgements: strong Absolute judgments: weak lOMoAR cPSD| 23136115 Ames Room lOMoAR cPSD| 23136115 AMES ROOM