Efficient data storage system for gray-scale printers

Details Efficient data storage system for gray-scale printers Efficient data storage system for gray-scale printers

1991-08-30

1992-07-07

Evans, Arthur G.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358462, G06K 1500

Patent

active

051290480

ABSTRACT:
Apparatus and method for producing a page output from electronic input data consisting of text and line graphics information and of pictorial information. The text and graphics information is converted to two-bit per pixel data and stored in a page buffer. The pictorial information is originally stored at its originating pixel resolution and at a bit level sufficient to represent the full color content. This pictorial data is expanded to a finer pixel resolution at a four-bit level, per color, at the time data is to be merged with the text and graphics data. The merging is accomplished in a band or line buffer which combines the two-bit and four-bit data. A location table is used to keep track of the bit level transitions and to signal the output device that the data is in a particular format.

REFERENCES:
patent: 4553172 (1985-11-01), Yamada et al.

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