Multiple valve image filtering device

Details Multiple valve image filtering device Multiple valve image filtering device

1993-08-02

1999-11-16

Vu, Kim Yen

Image analysis

Image enhancement or restoration

Image filter

358447, 358448, 358463, 358466, 382264, H04N 140

Patent

active

059871857

ABSTRACT:
A multible value image filtering device selectively filters segments making up an image signal. The selection is made according to the segments' characteristics, such as the optical density or amount of change of optical density between adjacent segments. The characteristics are compared to a threshold which can be changed according to various conditions, such as the type of document being scanned.

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