1. A software-controlled, page-by-page method for minimizing color toner usage during printing of a color page by a color printer, where such a color page potentially includes different page image elements, said method comprising pre-selecting different categories of page image elements on the basis of respectively related, pre-chosen, image-element-specific, image-content information density characteristics, which characteristics are assigned to one of three different levels identified as (a) dense, (b) sparse, and (c) unknown, and wherein the mentioned levels of information density characteristics are determined utilizing at least one of certain thresholding factors including (a) local contrast, and (b) image entropy, establishing specific, different color-toner usage-level rules which are to be associated individually and respectively with such different image-element categories, examining the image data for a color page which is to be printed to identify therein the presences of different ones of the pre-selected image-element categories, associating appropriately with each one of the identified, different categories of such image elements, the specific, respective, established color-toner usage rules, and following said associating, outputting the image-elements to the printer along with instructions that the printer use, in the specific, per-element printing of such image elements, the correct, respectively associated color-toner usage rule(s).