Method for lofargram image enhancement

Details Method for lofargram image enhancement Method for lofargram image enhancement

1993-02-03

1995-04-25

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 39, 382 9, G06K 940, G06K 962, G06K 934

Patent

active

054106184

ABSTRACT:
A method for enhancing lofargram data images utilizing a rule base. The system takes a plurality of sequentially occurring vertical frequency strips of a lofargram data image and computes an estimate for the mean and variance of each vertical frequency strip. A linear transformation utilizing a rule base is then applied to each pixel of the vertical frequency strip to improve the visual clarity of the lofargram data image.

REFERENCES:
patent: 3833797 (1974-09-01), Grobman et al.
patent: 3890598 (1975-06-01), Hagen et al.
patent: 3894348 (1975-07-01), Fontaine
patent: 4736199 (1988-04-01), Chadwick et al.
patent: 4761819 (1988-08-01), Denison et al.
patent: 4953147 (1990-08-01), Cobb
patent: 5008630 (1991-04-01), Reimel
Rule Based Expert System Approach to High Quality Image Enhancement, J. S. P. Shu, 26th Fall Symposium, SPSE's Conf. & Ex., Arlington, Vir., Oct. 13-17, 1986, pp. 194-207.

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