Image analysis – Histogram processing – For setting a threshold
Patent
1989-05-02
1992-03-03
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
3582613, 358433, G06K 936
Patent
active
050938720
ABSTRACT:
A method and apparatus for compressing digital image data using interlocking digitate geometric sub-areas. The digital picture elements, or PELs, representing the image are divided into interlocking digitate sub-areas, which, in the preferred embodiment, are of substantially the same size and shape. Data compression is achieved for the PELs within a sub-area by first sorting the values of the PELs within the sub-area by magnitude. Depending upon the magnitudes of the PELs in the sub-area relative to the magnitudes of the other PELs in the sub-area, the PELs in the sub-area are either coded solid tone, with each PEL in the sub-area having the same tone, or coded bi-tonal, with each PEL in the sub-area having either one of two tones. A smoothing process is utilized to reduce undesireable effects at the edges of the sub-area.
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Interand Corporation
Loudermilk Alan R.
Mancuso Joseph
Moore David K.
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