1. A global adaptive deinterlacing method for reducing feathering and scintillation artifacts, comprising: determining a contrast distribution; determining a correction factor; reading an R signal and an S signal, each an initial indicator of global motion in an input image; determining a global motion regions based upon the R and S signals; and detecting vertical motion of pixels, thereby deriving vertical motion values; determining vertical motion of tiles using said vertical motion values and a tile counter; and determining whether an entire field is in vertical motion using the vertical motion of tiles and a field motion counter, wherein the determining an amount of global motion comprises generating and reading one or more provided global motion indicator signals.