Document reproduction machine with electronically enhanced book

Details Document reproduction machine with electronically enhanced book Document reproduction machine with electronically enhanced book

1992-09-16

1994-01-04

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Facsimile measuring, testing, or calibrating

358452, 358443, 358474, 355 55, H04N 100

Patent

active

052765300

ABSTRACT:
A book copying system is disclosed which utilizes a height detector associated with the scan mechanism to obtain the distance between the image plane and portions of the image spaced from the image plane. Optical image data derived from scanning the original is converted to digitized electrical image information. A data processor calculates and/or utilizes correction factors for correcting the electrical image data for imaging mispositioning, image defocusing and loss of image illumination at the portion of the original image displaced from the image plane. Image compression is corrected by control of scan speed. Image illumination is also corrected by increasing the amount of illumination during scan of the portion of the original image displaced from the image plane. Correction of the electrical image data allows the use of less complex elements in the scanning mechanism. Correction signals can be developed during a prescan operation or in realtime scanning.

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