Lecture 21 - Topics - Perception For Action

Lecture 21 - Topics - Perception For Action - Introduction...

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    Introduction to Cognitive Science PSYCH 1102/COGST 1101/LING 1170/ PHIL 1910/CS 1710
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    Topics: Perception for action Seeing a ball and catching it aren’t the same  thing
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    Outline The typical view of perception What we’ve seen of perception so far Two visual systems Seeing without seeing Perception for action An introduction to modern robotics
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    The typical view of perception What we’ve seen of perception so far
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    The typical view of perception When we discussed neuroscience: We saw how networks of neurons created a  complex visual representation Light sensitivity (photoreceptors) Points of light (center-surround cells) Lines at angles (simple cells) Location-independent lines (complex cells)
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    The typical view of perception When we discussed categorization: We say how simple perceptual features allow  us to determine what type of object we are  seeing “Object recognition”
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    The typical view of perception We say how we can use a simple network to  store a representation of an event and the  objects in it
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    The typical view of perception When we discussed knowledge  representation: We say how we can use our previous  memories to create semantic networks and  complex decision making about objects in the  world In honor of the 40 th  anniversary of  Sesame street an example of top-down  influences on perception
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    The typical view of perception We reconstruct a veridical three  dimensional representation of the world  that is available to “consciousness” Find textures Find and recognize objects We reason about our model and then act  based on this reasoning
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    The typical view of perception The problem: It is slow The world changes fast! The paradox If we do vision this way, why don’t we have  more accidents
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    The typical view of perception
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    The typical view of perception
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    Two visual systems Seeing without seeing
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    Two visual systems A brief tour of the visual system Retina Optic Nerve LGN Primary visual cortex And then onwards…
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    Two visual systems - LGN
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Lecture 21 - Topics - Perception For Action - Introduction...

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