Image signal correcting in image data processing requiring only

Details Image signal correcting in image data processing requiring only Image signal correcting in image data processing requiring only

1991-11-05

1993-11-16

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358444, 358445, 358463, 358466, 341163, H04N 140

Patent

active

052628736

ABSTRACT:
An image signal correcting circuit device includes an A/D conversion unit for converting an analog image signal output from an image reading unit into a digital signal, a storage unit for storing correction data, and a correction unit for performing correction on a signal based on the correction data stored in the storage unit. The correction data stored in the storage unit is difference data between at least two pixel signals in the digital signal which is generated by a correction data generating unit. Alternatively, the correction data stored in the storage unit is obtained by amplifying an analog reference signal by an amplification factor of m (m>1) and by converting the amplified analog signal into a digital correction signal by the A/D conversion unit.

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