Image sensing apparatus with shading compensation

Details Image sensing apparatus with shading compensation Image sensing apparatus with shading compensation

1988-06-24

1990-04-10

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358163, 358443, H04N 140

Patent

active

049165496

ABSTRACT:
An image sensing apparatus with shading compensation is provided such that an object to be sensed is moved with respect to light sensing elements and the same point of the object is sensed by different light sensing elements, whereby shading compensation information can be obtained. When a white reference board is used as the object, despite non-uniformity in brightness of the white reference board, uniform image sensing signals with proper shading compensation can be obtained independent of variations in sensitivity of the light sensing elements.

REFERENCES:
patent: 4523229 (1985-06-01), Kanmoto
patent: 4760464 (1988-07-01), Sakano
patent: 4806780 (1989-02-01), Yamamoto et al.
Thomas G. Stockham, Jr., "Image Processing In The Context Of A Visual Model", Proceedings Of The IEEE, vol. 60, No. 7, Jul. 1972, pp. 828-842.
T. R. Little, "Real Time Digital Correction Of Acquisition Errors Applied To Solid State Scanners", SPIE, vol. 119 Application Of Digital Image Processing (IOCC, 1977), pp. 172-181.

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