A global and local statistics controlled noise reduction system in which
the video image noise reduction processing is effectively adaptive to
both image local structure and global noise level. A noise estimation
method provides reliable global noise statistics to the noise reduction
system. The noise reduction system dynamically/adaptively configures a
local filter for processing each image pixel, and processes the pixel
with that local filter. The filtering process of the noise reduction
system is controlled by both global and local image statistics that are
also computed by the system.