Image quality control apparatus capable of density-correcting pl

Details Image quality control apparatus capable of density-correcting pl Image quality control apparatus capable of density-correcting pl

1989-11-29

1991-12-24

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358462, H04N 140

Patent

active

050757881

ABSTRACT:
An image processing apparatus includes a CCD image reader for reading image data of an original image, histogram calculators for correcting a density of the image data output from the CCD image reader, a digitizer for designating an arbitrary area of the original image, and selectors for selecting different density correction modes for an area designated by the digitizer and a remaining area. The histogram calculators have photograph and character area designation modes.

REFERENCES:
patent: 4651293 (1987-03-01), Kato
patent: 4686579 (1987-08-01), Sakanoto
patent: 4723173 (1988-02-01), Tanioka
patent: 4731662 (1988-03-01), Udagawa et al.
patent: 4734782 (1988-03-01), Maeshima
patent: 4772911 (1988-09-01), Sasaki et al.
patent: 4821334 (1989-04-01), Ogino et al.

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