| 摘要 |
A method for determining a scaled colour map of a scaled image is described using the transformation of the original colour map and the original image only, independently of the scaled image. A number of colours N in the original colour map is determined; and provided N>Nmax, all colours in the original colour map are reused in the scaled colour map. If N<Nmin, the number of colours in the original colour map is increased. Otherwise, the scaled colour map is formed including: selecting a sub-set of colours in the original colour map; increasing a number of colours in the selected sub-set; adding the resulting sub-set with increased number of colours to the original colour map; and removing duplicate colours, wherein Nmin and Nmax are respective predetermined minimum and maximum thresholds for a number of colours in the original colour map. A corresponding system is also provided. |
