Patent ID: 7003173

Claim:
A filter system for post-processing a digital image, said digital image having a plurality of visual-edge pixels and a plurality of visual non-edge pixels, said filter system comprising: (a) an edge mapper for producing a binary map of said visual edge pixels and said visual non-edge pixels; (b) a pixel sorter comprising; (i) said pixel sorter for reading said binary map; and (ii) said pixel sorter for assigning to each pixel a type of filtration to be provided by said filter system, said type of filtration selected from the group consisting of: (A) de-ringing filtration; (B) edge sharpening filtration; and (C) no filtration; (c) an adaptive filter for receiving output from said pixel sorter; and (d) said adaptive filter comprising: (i) a de-ringing module for post-processing said visual non-edge pixels assigned a de-ringing filtration type of filtration; and (ii) an edge sharpener for post-processing said edge pixels assigned an edge sharpening filtration type of filtration.