Screened hardcopy reproduction apparatus with compensation

Screened hardcopy reproduction apparatus for applying toner to a receiver, comprising:

• a. a print engine for applying the toner to the receiver, wherein the print engine may not apply toner uniformly, whereby the toner applied to the receiver has a non-uniformity;
• b. a controller for receiving an input pixel level and a corresponding input pixel location;
• c. a tone-reproduction unit for calculating an output pixel level from the input pixel level and a corresponding output pixel location from the input pixel location;
• d. a compensator for calculating a compensated pixel level from the output pixel level and the output pixel location;
• e. a screening unit for calculating a screened pixel level and a screened pixel location from the compensated pixel level, the output pixel location, and a selected screening pattern;
• and
• f. wherein the print engine applies an amount of the toner corresponding to the screened pixel level and the non-uniformity to the receiver at a toner location corresponding to the screened pixel location to compensate for the non-uniformity.