Creating composite page images from compressed data

Details Creating composite page images from compressed data Creating composite page images from compressed data

2006-01-03

2006-01-03

Coles, Edward (Department: 2622)

Facsimile and static presentation processing

Static presentation processing

Emulation or plural modes

C358S001150, C358S002100, C358S003130, C358S003140, C358S003150, C358S003160, C358S003170, C358S003180, C358S003190, C358S462000, C358S534000, C358S535000, C358S536000, C382S176000

Reexamination Certificate

active

06982799

ABSTRACT:
A printhead controller controls printing of a page by at least one printhead. The printhead controller, in use, receives data, in a compressed format relating to the page to be printed, the data including a page description comprising a bi-level black layer and a contone color layer. The printhead controller extracts from the compressed data relating to the bi-level black layer the contone color layer. Memory is provided for temporary storage of the expanded data. A dithering/compositing unit produces a ditherer page from the data temporally stored in the memory and feeds its out put to the printhead.

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