Image forming apparatus, image forming method and image...

Incremental printing of symbolic information – Ink jet – Controller

Reexamination Certificate

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C358S001900

Reexamination Certificate

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07431413

ABSTRACT:
An image forming apparatus, for forming an image by using distribution of plural types of dots, including: a first section, for making comparison between a pixel value of a target pixel and a value in a dither matrix stored in advance, and determining, whether a dot having the highest density be formed at a position corresponding to the pixel; a second section for determining whether a second type dot having lower density be formed at the position where the dot having the highest density is determined not to be formed; and a section for instructing, based on results of determination by the first and second sections, whether a dot should be formed at the position, wherein the dither matrix comprises values, each being not less than a predetermined value smaller than the maximum pixel value of the input image.

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Ulichney, Robert: “Video Rendering” Digital Technical Journal, vol. 5 No. 2 Spring 1993, pp. 9-18.

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