Shading correction using variable slicing threshold

Details Shading correction using variable slicing threshold Shading correction using variable slicing threshold

1988-05-02

1990-08-07

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 54, G06K 938

Patent

active

049474456

ABSTRACT:
An image processing apparatus has a reader for photoelectrically reading an image, a reference member of a reference density, a memory for storing the status of change of the output signals obtained by reading the reference member using the reader, and a binary encoder for binary encoding the output signals of the reader according to the stored content of memory.

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