01:377:303 Lecture Notes - Lecture 22: Shutter Speed, Human Eye, Action Potential
23 Mar 2020
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Document Summary
Purpose is to go beyond the ability of the human body to assess and analyze human movement. Human eye can process information from 10-12 items per second but some movements take less than 1 second to complete. We can overcome this by freezing the movement. Leaving the shutter open can reveal the pattern of the movement when the movement is performed in a dark room with a person wearing light bulbs on the various joints and extremities. The camera is fitted with a motor drive to get a more rapid film advancement and exposure. High speed motion picture camera coupled with a stop-motion film analyzer. 500 frames per second for human motion. 20,000 frames per second for projectiles and impacts. Digitize on an x and y axis and feed it into the computer for assessment. Interface the video with the computer for analysis instead of using movie film.
