A ROBUST AND FAST METHOD FOR COLOUR IMAGE SIZE REDUCTION WITH FINE STRUCTURE PRESERVATION

摘要

This document describes a method and a system that is concerned with reducing the size of images and preservation of fine structure in it. The method introduces the generic 'thin pixel' rather than some ad hoc thin lines. In plain words, thin pixels are those that bear critical information (e.g. stock charts) but tend to be lost, either partially or completely by conventional reduction methods. By classifying pixels into thin and non-thin pixels and holding a small scale (≤ 2), a number of simple and robust core reduction algorithms (CRA) are devised. By applying the CRAs iteratively, images can be reduced by arbitrary scales. The method handles colour images.