Median Masking Technique For The Enhancement Of Digital Images
Robert T. Gray, Dennis G. McCaughey, Bobby R. Hunt · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1979
A nonlinear masking technique has been developed which characterizes digital images by local measures of the median and the median absolute deviation (MAD). Space-variant enhancement is elicited by modifying the local MAD as calculated over a moving window in the original image. The method is found to be effective in edge enhancement and noise cleaning operations.