EXSS2029 Lecture Notes - Lecture 1: Shutter Speed, Autofocus, Frame Rate
4 Sep 2018
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Angular and linear equivalents of equations v = a = force = torque mass = moment of inertia. Sketch showing a defined system in isolation depicting all of the external forces acting on the system. Used for qualitative and quantitative (digitising) analysis. Completed while camera on tripod > fixed in space. > computer screen image representative of real world (global coordinate system) Tripod, appropriate field of view (zoom), locked zoom and focus throughout, manual focus necessary. Slower frame rate may miss key actions in the movement. Slow shutter and longer duration allows more movement between each frame. Autofocus = changes image size during movement. Biomechanics = manual focus > fixed focus. Object of known dimensions must be recorded in plane of motion. Used to identify body landmarks, joint centres. Perspective error apparent change in length of objects as they move away from plane of movement (minimised through further camera positioning)
