出版社：The Institute of Image Information and Television Engineers
摘要：This paper describes a method for restoring the defects inherent in video archives recorded in analog mode. The requirements for the restoration system are that it takes a short time and that it does not cost much. First, the nature and occurrence of the defects are examined for video archives. A restoration method is then proposed that is based on the characteristics of the defects. The method uses temporal and spatial median filters, the differences in luminance levels between the original and filtered images, and the chrominance levels of the original images. It restores not only the defects in small motion areas but also conspicuous white scratches without producing any artifacts. It has a semiautomatic mode, and it enables the selection of the temporal and spatial median filters and the number of frames for the temporal filter or the macroblock size for the spatial filter.
