TC runtime control using underdeveloped solid, and edge enhancement

摘要

An electrophotographic printing machine having a latent image is recorded on a photoconductive member with the latent image being developed with marking particles, includes: imager for recording a test patch consisting of a solid patch; developer for developing the test patch with marking particles wherein the developed patch has a solid portion and an edge portion; sensor for measuring a density of the solid portion of the test patch; sensor for measuring a density of the edge portion of the test patch; a system for generating a first output signal corresponding to the density of the solid portion of the test patch; and a system for generating a second output signal corresponding to the density of the edge portion of the test patch.