Method and apparatus for modifying multi-tone image

Details Method and apparatus for modifying multi-tone image Method and apparatus for modifying multi-tone image

1996-06-27

1999-09-07

Boudreau, Leo H.

Image analysis

Image enhancement or restoration

382266, 382302, 382199, G06K 940, G06K 954, G06K 960, G06K 948

Patent

active

059499133

ABSTRACT:
A mask area is specified as a target area of modification in a multi-tone image. The multi-tone image is converted to a plurality of binary images with a plurality of threshold values. A plurality of density-contours corresponding to the plurality of binary images are extracted. Without implementing any contraction or expansion, a portion overlapping the contour of the mask area is deleted from each extracted density-contour. A plurality of modified density-contours which do not include the portions overlapping the contour of the mask area are converted back to a modified multi-tone image.

REFERENCES:
patent: 5097521 (1992-03-01), Massmann
Shih et al., "Threshold Decomposition of Gray-Scale Morphology into Binary Morphology", IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 11, No. 1, Jan. 1989, pp. 31-42.
John C. Russ, The Image Processing Handbook, 2nd Ed., CRC Press Inc., 1995, pp. 407-414.

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