Removing moiré from degraded video archives

This paper considers the removal of moiré patterns, which may appear during film-to-video transfer using Telecine devices. A model of moiré distortion is created and studied. A new suppression algorithm using spectral analysis is presented and applied for real video sequences. This non-linear filter is based on thresholding of the magnitude of the Fourier spectrum of the image. The paper also considers the use of overlapped block processing in order to reduce the effect of ringing artefacts that could appear due to the non-stationarity of the moiré pattern.