Image processing system to correct the density range of image da

Details Image processing system to correct the density range of image da Image processing system to correct the density range of image da

1997-09-22

2000-04-04

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Image filter

358448, 382169, G06K 938

Patent

active

060470925

ABSTRACT:
An image processing apparatus for processing original image data, having a given density range, with a predetermined manner to provide processed image data, comprising means for correcting the density range of the image data to provide density-range-corrected image data corresponding to a distribution of the density of the image data, means for filtering the image data to generate filtered image data, means for synthesizing the density-range-corrected image data provided by the correcting means and the filtered image data provided by the filtering means so as to provide synthesized image data, and means for selecting either one of the density-range-corrected image data provided by the correcting means and the synthesized image data provided by the synthesizing means, in accordance with the density range of the density-range-corrected image data, so as to provide selected image data as the processed image data.

REFERENCES:
patent: 4695884 (1987-09-01), Anastassiou et al.
patent: 5012333 (1991-04-01), Lee et al.
patent: 5400377 (1995-03-01), Hu et al.
patent: 5513282 (1996-04-01), Williams
patent: 5682033 (1997-10-01), Cattorini
patent: 5684601 (1997-11-01), Endo
patent: 5724444 (1998-03-01), Yamanishi
Nakamura et al., "High Quality Image Processing Method using Moire Suppression and Edge Enhancement Filtering," The Journal of Institute of Image Electronics Engineer of Japan, vol. 22, No. 5, 1993, pp. 445-450.

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