Patent ID: 8411324
Filing Date: 2013-04-02
Classification: H04N

Abstract:
1. An image marking device that marks an image on a substrate based on a tone reproduction curve, the image marking device comprising: a control unit that digitally controls the tone reproduction curve; a sensor that reads a calibration patch marked on the substrate by the image marking device; a target unit that determines a target line width for images that will be marked on print media by the image marking device; a calculating unit that calculates an estimated line width for images that will be marked on print media by the image marking device, based on the reading of the calibration patch by the sensor; a comparing unit that compares the calculated estimated line width with the determined target line width; and an adjusting unit that modifies one or more settings of the image marking device so that the calculated estimated line width becomes closer to the determined target line width, wherein the control unit implements a digital correction that compensates for impact of the modification of the one or more settings on the tone reproduction curve, the digital correction maintains the tone reproduction curve independently from the one or more settings, and the one or more settings include any of exposure intensity and cleaning field intensity.