Image printing apparatus and image printing method

Details Image printing apparatus and image printing method Image printing apparatus and image printing method

2003-08-26

2009-06-16

Coles, Edward L (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003020, C358S003090, C358S003100, C347S012000, C347S015000, C347S040000

Reexamination Certificate

active

07548347

ABSTRACT:
This invention has as its object to realize multi-pass print control which requires a short processing time by a simple arrangement. To this end, a printer according to this invention attains multi-grayscale print control by changing the number of dots to be printed on each pixel to overlap each other in multi-pass print control that prints the pixel in a plurality of scans. In this case, index patterns, each of which designates which of scans is to be used to print in accordance with the density level of a pixel, are prepared for respective pixel values. If a plurality of patterns are prepared for each pixel value, a pattern is randomly selected from them. An image is printed in accordance with a print pattern defined by the selected pattern.

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