Edge-preserving filtering method and apparatus

Abstract

An edge-preserving filtering method and apparatus. The edge-preserving filtering method includes: acquiring an upper edge pixel P(x,y−n), a lower edge pixel P(x,y+m), (m+n) left edge pixels P(x−p,y′), and (m+n) right edge pixels P(x+q,y′) of a pixel to be filtered P(x,y), wherein “x”, “y”, “m”, “n”, “p” and “q” are all positive integers, and “y” takes an integer larger than “y−n” and less than “y+m” in turn; acquiring a filtered pixel value of the pixel to be filtered by using pixel values of the pixel to be filtered, the upper edge pixel, the lower edge pixel, the left edge pixels and the right edge pixels. The edge-preserving filtering method and apparatus in accordance with an embodiment utilize edge information around the pixel to be filtered to swiftly acquire a set of pixels for filtering the pixel to be filtered, and thus implement edge-persevering filtering.

Dependencies are inferred from the claim text.