Shading correction device

Details Shading correction device Shading correction device

1982-06-15

1985-06-11

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358284, H04N 138

Patent

active

045232296

ABSTRACT:
A device for carrying out the shading correction of an image signal is provided. The present device includes an image sensor capable of scanning a reference density reflecting plate over a predetermined number of times along different scanning lines and averaging means for taking an average among the repeated scannings thereby forming an error-free reference data to be later used in the operation of shading correction.

REFERENCES:
patent: 4314281 (1982-02-01), Wiggins
patent: 4354243 (1982-10-01), Ryan
patent: 4355228 (1982-10-01), Sama

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