Tonal conversion method for pictures

Details Tonal conversion method for pictures Tonal conversion method for pictures

1989-08-08

1990-09-11

Reynolds, Bruce A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358456, H04N 123

Patent

active

049567187

ABSTRACT:
An original picture having a standard or non-standard picture quality is converted into a halftone picture, which is to be reproduced, on basis of pictorial information. The density information on the individual density characteristic curve is adjusted to the density information on the standard density characteristic curve. The adjusted density information is then processed in such a way that the base density of a desired control point on the original picture and the halftone intensity of a corresponding control point on the halftone picture are correlated in accordance with a specific conversion formula.

REFERENCES:
patent: 4811108 (1989-03-01), Numakura
patent: 4833546 (1989-05-01), Numakura

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