Density modification device

Details Density modification device Density modification device

1994-09-21

1998-02-03

Mancuso, Joseph

Image analysis

Histogram processing

With a gray-level transformation

382274, 348254, 358458, G06K 900, G06K 940

Patent

active

057153302

ABSTRACT:
An image input section selects a plurality of sample points from an input image, and passes the density values of the sample points and pixels around them to a feature parameter extractor. The feature parameter extractor calculates the feature parameters of each sample point and passes them to a density modification function generator. The density modification function generator creates a density modification function for each sample point and passes the density modification function data to a density modification function modifier. The density modification function modifier determines a density modification function for all of the pixels, including those other than the sample points, and passes this density modification function data to a processor. The processor modifies image data delivered from the image input section, and passes the modified image data to a modified image output section.

REFERENCES:
patent: 4571635 (1986-02-01), Mahmoodi
patent: 4642683 (1987-02-01), Alkofer
patent: 4910787 (1990-03-01), Umeda
patent: 4941190 (1990-07-01), Jayce
patent: 4969202 (1990-11-01), Groezinger
patent: 5524070 (1996-06-01), Shin et al.

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