Shading correcting method and shading correcting apparatus

Details Shading correcting method and shading correcting apparatus Shading correcting method and shading correcting apparatus

1992-12-14

1996-11-05

Yu, Kim Ven

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358464, 382274, H04N 140

Patent

active

055723373

ABSTRACT:
Data ID obtained by making analog-to-digital conversion of an output of an image sensor or the like is subjected to shading correction, to obtain correction data SOUT. The correction data SOUT is found by the following equation using white reference data WST and black reference data BST: ##EQU1## where K is a coefficient.

REFERENCES:
patent: 5115327 (1992-05-01), Ishima
patent: 5181118 (1993-01-01), Kimura
patent: 5191445 (1993-03-01), Kurokawa et al.
patent: 5249068 (1993-09-01), Takase
patent: 5260809 (1993-11-01), Tachikawa

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