Image processing method and apparatus with gamma-correction cont

Details Image processing method and apparatus with gamma-correction cont Image processing method and apparatus with gamma-correction cont

1992-02-21

1993-11-02

Braun, Fred L.

Recorders

Electric recording

Electrochemical

346160, 358519, G01D 1500, H04N 121, G03F 308

Patent

active

052587835

ABSTRACT:
An image processing apparatus, which improves the image quality in gradation control, measures the density of a specified gradation pattern formed on a photosensitive drum with a photosensor and prepares a look-up table for gamma correction, based on thus measured density. Formation of a pseudo-contour is prevented by control of the inclination of the gamma correction curve represented by the data of the look-up table.

REFERENCES:
patent: 4888636 (1989-12-01), Abe
patent: 4963898 (1990-10-01), Kadowaki et al.
patent: 5057913 (1991-10-01), Nagata et al.
patent: 5061949 (1991-10-01), Ogino et al.

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