Patent ID: 9148644
Filing Date: 2015-09-29
Classification: G06T,G11B,H04N

Abstract:
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; thresholding the differenced frame; comparing the thresholded differenced frame to a threshold minimum value of lit pixels in the frame to determine if the video frame contains a structured artifact; identifying groups of connected pixels within the differenced frame as blobs; removing isolated blobs to produce a cleaned image; comparing a number of lit pixels in the cleaned image to the threshold minimum value of lit pixels; when the number of lit pixels in the cleaned image is greater than the threshold minimum value of lit pixels, 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.