HIGH QUALITY DEINTERLACING USING INPAINTING AND SHUTTER-MODEL DIRECTED TEMPORAL INTERPOLATION
David Tschumperlé, Bernard Besserer · Kluwer Academic Publishers eBooks · 2006
Abstract The proposed deinterlacing scheme is aimed towards high-quality progressive image output, typically for a videotape-to-film blow-up operation. This operation consists in increasing the resolution of video images, recording these images on 16mm or 35mm film and reducing the typical video artefacts (due to interlaced scanning, electronic noise), eventually adding some film-look features (color correction, motion blur,.). This paper focuses on the deinterlacing part. Since video real-time is not relevant for digital blow-up (film recorders are slow), the proposed approach gives more weight to quality for both spatial and temporal characteristics of the image. Each field from the interlaced source is extended to a full frame by using an accurate in-painting process, outstretching edges and preserving their intensity. Motion estimation is then performed from these two inpainted images, and the computed forward and backward motion vector fields are finally used for temporal integration. During this process, the inter-field motion is converted to a motion blur appearance, similar to the one physically produced by the prolonged exposure time in film cameras. Finally, the resulting image is upsized and enhanced by a warp-filter, which unlike high pass filters does not augment noise.