A method of processing a digital image to improve tone scale, includes the
steps of: generating a multiresolution image representation of the
digital image including a plurality of base digital images and a
plurality of residual digital images; applying a texture reducing spatial
filter to the base digital images to produce texture reduced base digital
images; combining the texture reduced base digital images and the
residual digital images s to generate a texture reduced digital image;
subtracting the texture reduced digital image from the digital image to
produce a texture digital image; applying a compressive tone scale
function to the texture reduced digital image to produce a tone scale
adjusted digital image having a compressed tone scale in at least a
portion of the image; and combining the texture digital image with the
tone scale adjusted digital image to produce a processed digital image,
whereby the contrast of the digital image is improved without compressing
the contrast of the texture in the digital image.