Colour correction of images

摘要

A raw image consists of a plurality of pixels in a plurality of colour planes giving a colour image. The raw image is split into at least a low frequency image and a high frequency image. At least the low frequency image is colour corrected to produce a colour corrected low frequency image. The colour corrected low frequency image is combined with at least the high frequency image to give a final image which is of comparable resolution to the raw image but is colour corrected.