Patent ID: 8605332

Claim:
Electrophotographic printing method for converting an original two-tone image into a final, two-tone pixellated image for printing on an electrophotographic printer arranged to print two-tone images and capable of printing partial area exposed pixels, the electrophotographic printing method comprising: mapping the original image onto an original pixel grid; measuring the amount of area of each pixel in the original pixel grid covered by one of the two tones of the original image; antialiasing the original image into an intermediate pixellated image comprising greyscale pixels having assigned greyscale values, wherein the greyscale values depend upon the amount of coverage of a corresponding pixel in the original pixel grid by the one of the two tones of the original image; translating the intermediate image into the final, two-tone pixellated image by translating the assigned greyscale values into exposure values indicative of the amount of pixel area for a corresponding pixel or pixels in the final image to be covered by one of the two tones in the final image; and exposing a photoconductive plate according to the exposure values by modulating a laser in terms of intensity; wherein translating the intermediate image into the final, two-tone pixellated image comprises translating a greyscale value corresponding to any pixel in the original image that is partially covered by the one of the two tones in the original image into a partial exposure value indicative of a partial pixel area of a corresponding pixel in the final image to be covered by the one of the two tones in the final image.