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{"name":"Shaky Shake JS","tagline":"Motion Detection In Video Through Javascript","body":"# Shaky Shake JS\r\nSimple Motion Detection In Video Through Javascript\r\n\r\nThe first example ([movement](demos/movement.html)) shows how to detect any movement within a video stream. It is able to detect how much movement is occurring. The concept is quite basic:\r\n\r\n- Grab each frame of the video media\r\n- Compare the current frame with the previous frame\r\n- Perform a difference of the luminosity (grayscale) for every pixel in the frame\r\n- If the luminosity difference is above a certain threshold (0-255), it is counted as a \"movement pixel\"\r\n- The count of how many of these movement pixels is what drives the gauge showing how much movement occurred","google":"UA-2390640-8","note":"Don't delete this file! It's used internally to help with page regeneration."}