Pixel modulation circuit and recording apparatus using the same

Details Pixel modulation circuit and recording apparatus using the same Pixel modulation circuit and recording apparatus using the same

1996-04-04

1998-10-20

Moore, David K.

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

358455, G06K 938

Patent

active

058259392

ABSTRACT:
A pixel modulation circuit outputs a pulse signal having a pulse width corresponding to pixel data representing a gradation level of each pixel. The pixel modulation circuit comprises a first triangular pulse generating circuit for generating a periodic triangular pulse signal, a complement and antilog output circuit capable of outputting a level signal corresponding to both antilog and complement values of pixel data, and a comparison circuit for comparing the triangular pulse signal with the level signal.

REFERENCES:
patent: 5502419 (1996-03-01), Kawasaki

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