SSEH3355 : Biomechanical Principles Course Summary
31 Jul 2015
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Slr mirror reflex to the picture taker what the image is. Maximum frame rate of still cameras today = ~14fps without resolution tradeoff. Playback rate 25 frames per second (interlaced fields) overlap each photo together. Can be used to capture low speed motion (e. g. walking gait), may miss critical events. Not suitable for analysis of high speed motion (sprint, golf swing) Playback rate variable but generally he same as capture rate. Software can deconstruct separate images, beneficial for biomechanics. Max frames per second at full image resolution very important. 1280x16 = 16 pixels, not usable in biomechanics. Higher frame rates require more light to capture correctly. Easy to maintain database of information (cricket/tennis australia) 2d views can be very misleading ensure multiple 2d cameras are available. Light emitting diodes are tracked by a marker detection module and computer. High noise susceptibility (metal, electronic) = ? accuracy. Aliasing theory related to correct sampling rate.
