Digital electrostatic printing apparatus using a counted number of pixels of various densities to determine and control an amount of toner used during image development

摘要

image output apparatus includes a circuit for counting the number of pixels of various color and gradation densities contained in the image data, a circuit for estimating, based on the counted number, the amount of toner that will be consumed during development of the image data; and a circuit and rollers of an controlling based on the estimated amount the actual a mount of toner supplied for developing the image.