10_Unit2-2.5_Vision copy

Optic ow things that are close move fast optic flow

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Unformatted text preview: rspective – parallel lines converge in the distance towards a vanishing point Vision – Object Recognition - Aiming 8 ! optic flow things that are close move fast Optic Flow things that are far move fast!!!!! During relative anterior/posterior (forward and backward) motion, distant objects appear to move less (slower) then nearer objects which appear to move more (faster). Optic Flow Demo http://images.google.com/imgres?imgurl=http://www.rdg.ac.uk/arl/clips/demo_o1.jpg&imgrefurl=http://www.rdg.ac.uk/arl/clips/ demo_of_displays.htm&h=72&w=96&sz=2&tbnid=hwwyOWN26aUJ:&tbnh=57&tbnw=76&hl=en&start=1&prev=/images%3Fq%3Doptic%2Bflow%2Bdemo %26svnum%3D10%26hl%3Den%26lr%3D Time-to-Contact Time 1 2 3 4 9 ! Diving Gannets what makes these birds tuck?????--they are going at different speeds and hights the time to contact is constant in his research like when we hit the brakes in a car if they are going fast you brake earlier if you are going slow you brake later When do humans use time-to-contact? The Visual Moving Room Virtual Reality Cave – Jeka Laboratory 10 ! Visual Cave peripheral part is more important than movement Central versus Peripheral Retina A-P RMS (%) 300 200 100 Eyes Right Open Eye fovea occluded Eyes Closed central 30 occluded etc... Optic Flow – DC Airport 11 ! Multisensory Neurons we are m ultisensory!!!!!!---it comes from all sorts of sensors--- so visual and somatosensory!!! so we do whats called reweighting---like if we konw the visual world is lying to us we can devalue those and lean to rely more on other vestibualr and somatosensory senses Multisensory Enhancement/Averaging when there was two stimuli--they would avergae teh stimuli and wakl in between the signals Robot without Reweighting Dr. Tony Lewis, University of Arizona 12 ! Robot with Reweighting Dr. Tony Lewis, University of Arizona Walking - 3 Km/hr 13 ! Vision and Locomotion Shop til you drop paradigm University of Pittsburgh - Sparto, Redfern, Furman… 14 !...
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This document was uploaded on 03/28/2014 for the course KNES 385 at Maryland.

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