METHOD AND SYSTEM FOR PREDICTIVE SCALING OF COLOUR MAPPED IMAGES

摘要

A method for scaling an original colour mapped image are disclosed. The method performs steps of: transforming the original colour map into the scaled colour map based on the original colour map and the original image independently of the scaled image; scaling the original image into the scaled image; for each pixel of the scaled image: determining a set of contributing pixels in the original image, which define a colour of the pixel; determining the colour of the pixel based on colours of the contributing pixels and geometric proximity of the pixel to the contributing pixels; establishing correspondence between the colour of the pixel and a colour in the scaled colour map; and determining a corresponding colour map index thereof; and setting the determined colour map index in the scaled pixel map. A corresponding system for scaling digital images is also provided.