Method and apparatus for coding digital image information obtain

Details Method and apparatus for coding digital image information obtain Method and apparatus for coding digital image information obtain

1988-01-26

1990-10-23

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358429, 358457, 382 56, G06K 900

Patent

active

049658433

ABSTRACT:
Coding of digital data corresponding to a dithered image. The digital pixel values determined by comparison with a given threshold value of the dither matrix are combined to form a string. A string of this kind is formed for all the threshold values of the dither matrix. Strings found which are built up largely of a given pixel value are immediately converted into strings built up entirely of that pixel value, and are coded collectively. The other strings found are coded individually by comparing each of them with a set of standard strings and replacing them by the most similar standard string.

REFERENCES:
patent: 3726993 (1973-04-01), Lavallee
patent: 4013828 (1977-03-01), Judice
patent: 4266249 (1981-05-01), Chai et al.

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