Systems and methods are provided to evaluate moving objects undergoing periodic motion through the screening of a video recording of such objects in motion for frequency peaks in the spectral data, and to determine spatially where these frequencies occur in the scene depicted in the video recording, wherein a frequency spectrum is created for a subset of pixels or virtual pixels and a composite frequency spectrum table or graph is constructed of frequencies that are selected from among the larger group of frequencies represented by the frequency peaks of the spectral data.