High addressability image generator using pseudo interpolation o

Details High addressability image generator using pseudo interpolation o High addressability image generator using pseudo interpolation o

1992-05-21

1993-12-28

Ip, Paul

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358518, 358429, 358456, H04N 140

Patent

active

052744728

ABSTRACT:
There is provided a method to convert gray level image data from image input terminals, into binary data for high-addressability image output terminals. High addressability output terminals such as printers increase their virtual resolution in the fast scan direction in order to achieve a higher effective printing resolution. For example, one pixel in the slow scan direction divided into eight pixels in the fast scan direction, improves a printer's actual resolution from n spots.times.m spots per unit area to (8 * n) spots.times.m spots per unit area. Gray level input data representing pixel data from image input terminals such as scanners is encoded by either an analog signal or a quantized digital signal with a large number of levels (e.g. 256 levels). Binary output data has pixels with either a value of one or zero or a much smaller number of gray levels compared to digital input signals.

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