Identification method for generated position of dynamic false contour, processing method for image signal, and processing apparatus for image signal

摘要

A dynamic false contour detector identifies a pixel where a false contour is expected to be generated based on monotony of change in gradation level, an existence of carry/borrow of the subfields, and a position of a contour. Then, a pixel value switcher switches individual gradation levels among a plurality of pixels including the pixel identified by the dynamic false contour detector. As a result, it is achieved to reduce degradation of image quality due to the dynamic false contour with a simple structure and processes.