Continuous-tone printer with edge enhancement

Facsimile and static presentation processing – Facsimile – Recording apparatus

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Details

358448, 358530, 358532, H04N 140, H04N 1409, H04N 146, H04N 158

Patent

active

056193343

ABSTRACT:
A continuous-tone printer includes print enhancement circuitry for producing smooth edges responsive to continuous-tone pixel data. Translation circuitry translates the continuous-tone data into single-tone data responsive to a predetermined threshold. The single-tone data is stored in a memory coupled to edge enhancement circuitry, which may be similar to that used in prior enhancement circuits. For a given pixel, either the enhanced pixel data from the edge enhancement circuit or the continuous-tone data may be passed to print edges, based on the value of the continuous-tone pixel relative to upper and lower quantization values.

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patent: 5359433 (1994-10-01), Nagase et al.
patent: 5387985 (1995-02-01), Loce et al.

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