1. A method for determining a billing strategy for a document based upon an estimated an amount of color in that document, the method comprising: receiving a binary input color image of a document for which a billing strategy is to be determined, wherein each color plane of said binary color image is received at an offset of other color planes; dividing each color plane of said binary input image into M×N tiles; examining said binary input image to determine an on-pixel count for each of said tiles; aggregating said on-pixel counts for each tile to obtain a total on-pixel count for each of said color planes; estimating an amount of color in said binary input image based on said total on-pixel counts for each color plane; and determining a billing strategy for said document based upon said estimated color amount.