1. A method for detecting structured artifacts in a video, comprising: accepting a video frame at a video input; generating a filtered frame from the video frame; differencing the filtered frame from the accepted frame to create a differenced frame; identifying groups of connected pixels within the differenced frame as blobs; removing isolated blobs to produce a cleaned image; performing Fourier transform on the cleaned image; and identifying the video frame as having structured artifacts based on a comparison of magnitudes of Fourier components of the cleaned image.