Edge enhancement error diffusion thresholding for document image

Details Edge enhancement error diffusion thresholding for document image Edge enhancement error diffusion thresholding for document image

1990-05-08

1991-07-23

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 50, 382 54, 358447, 358462, 358464, 358465, G06K 900

Patent

active

050349902

ABSTRACT:
Apparatus for converting multilevel video images into a bilevel image having an accurate rendition of the original grayscale of the image. The apparatus performs enhanced preservation of edge information in the image when using error diffusion techniques.

REFERENCES:
patent: 4577235 (1986-03-01), Kannapell et al.
patent: 4878125 (1989-10-01), Katayama et al.

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