1. A method of classifying ciliary motion, comprising: receiving digital video data representing the ciliary motion generated by an image capture device, the digital video data comprising a plurality of frames; receiving an indication of a region of interest applicable to each of the frames, the region of interest comprising a plurality of pixels in each of the frames; calculating time series elemental motion data for at least one elemental motion parameter for the region of interest based on the digital video data; and using the time series elemental motion data to classify the ciliary motion.