Modeling large-area influence in digital halftoning for electrophotographic printers

Digital halftoning provides a mechanism for rendering continuous-tone images on devices such as printers. With electrophotography, the deposition of toner within the area of a given printer addressable pixel is strongly influenced by the halftone values of the immediately neighboring pixels. To account for these effects, it is necessary to embed a printer model in the halftoning algorithm. In our previous work, we used an efficient strategy to account for the impact of a 5×5 neighborhood of pixels on the central pixel absorptance. Now we examine the potential influence of a much larger neighborhood (45×45) of the digital halftone image on the measured value of a printed pixel at the center of that neighborhood. The experiment shows that the extended model yields a significant improvement in the accuracy of the prediction of the pixel values of the printed and measured halftone image.