Resolution conversion with simulated multi-bit gray

Details Resolution conversion with simulated multi-bit gray Resolution conversion with simulated multi-bit gray

1992-11-25

1994-04-05

Powell, Mark R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

348576, 382 54, H04N 1393

Patent

active

053010370

ABSTRACT:
A method for converting a set of input image pixels having a first resolution and being represented by a set of input image signals to a set of output image pixels having a second resolution and being represented by a set of output image signals. The method is adapted for use in an electroreprographic machine having a memory for storing images and an image output terminal for printing the images. The method comprises the following steps: first, developing a set of state determination rules which govern the conversion of the set of input image pixels having the first resolution to the set of output image pixels having the second resolution; second, communicating the set of input image signals and the set output image signals to the memory, third, relating a plurality of selected input image pixels with a selected one of the output image pixels; fourth, determining respective binary states of the plurality of selected input image pixels; finally, corresponding the selected output image pixel with one of at least three output states by reference to the determined, respective binary states and one of the state determination rules.

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patent: 5226094 (1993-07-01), Eschbach

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