Method for compressing dynamic ranges of images

Details Method for compressing dynamic ranges of images Method for compressing dynamic ranges of images

1994-04-18

1995-09-26

Couso, Yon J.

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

382132, G06K 940

Patent

active

054540534

ABSTRACT:
With a method for compressing a dynamic range of an image, the value of an unsharp mask signal Sus corresponding to each of picture elements in an original image is calculated by averaging the values of image signal components of an original image signal Sorg representing the original image, which image signal components represent the picture elements belonging to a predetermined region surrounding each of the picture elements. The original image signal Sorg is then processed with the formula

REFERENCES:
patent: 4302672 (1981-11-01), Kato et al.
patent: 4315318 (1982-02-01), Kato et al.
patent: 4571635 (1986-02-01), Mahmoodi et al.
"Journal of Japanese Society of Radiological Technology " vol. 45, No. 8, p. 1030, Aug. 1989.

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