Anti-aliased Pixel and Intensity Slope Detector

Abstract

Each image dot can be associated with some image part, for example line, area where intensity changes or area with constant intensity. Image processing use these image parts. Image transferring into the digital domain in any words image digitizing, because of finite dot (pixel) size some pixels are partly closed with light and dark area. These pixels are called anti-aliased. Frequently these pixels are unwanted or impede to extract edge or blur magnified image or ripple edge in shrink image. When it is possible to detect that pixel, different algorithm can be applied for processing and image quality can be increased. A method to detect anti-aliased pixels and pixels which intensity change continuous (slope) is presented. Ill. 7, bibl. 5 (in English; summaries in English, Russian and Lithuanian).