Method for transforming a coloured image

Abstract

The invention relates to a method of transforming a colour image, wherein for each separate pixel a measured level of lightness, a measured chroma and a measured colour is determined, followed by a predetermined adjustment in the three-dimensional level of lightness, chroma and colour, wherein a. for each separate pixel a direction of adjustment is determined by selection of a three-dimensional adjustment level for lightness, chroma and colour change, b. and in that at the three-dimensional adjustment level selected the maximum available lightness change is determined, whereafter c.; for each separate pixel the measured lightness level, the measured chroma and the measured colour is changed in the direction of the selected three-dimensional adjustment level in concurrence with a predetermined function, which at most amounts to the maximum available lightness change at the selected three-dimensional adjustment level.Applied Science