Digital image generation.

摘要

A method of generating a representation of a subsidiary coloured image initially contained within a larger image represented by digital data defining the colour content of pixels of the image comprises defining a control data array. This control data array (9) defines for at least those pixels in the image corresponding to the region containing the subsidiary image, the proportion of the image pixel colour which is due to the subsidiary image. The average colour in regions of the image different from the subsidiary image region is then determined. The inverse of the control data array is multiplied by the determined average colour to generate a background image (13) which is subtracted (14) from the corresponding region of the original image so as to generate the representation of the subsidiary image. <IMAGE>