Image analysis – Histogram processing – For setting a threshold
Patent
1991-11-12
1994-05-24
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
358426, 358432, G06K 900
Patent
active
053156706
ABSTRACT:
A data processing system augments compression of non-zero values of significant coefficients by coding entries of a significance map independently of coding the values of significant non-zero coefficients. A dedicated symbol represents a zerotree structure encompassing a related association of insignificant coefficients within the tree structure, thereby compactly representing each tree of insignificant coefficients. The zerotree symbol represents that neither a root coefficient of the zerotree structure nor any descendant of the root coefficient has a magnitude greater than a given reference level. The zerotree structure is disclosed in the context of a pyramid-type image subband processor together with successive refinement quantization and entropy coding to facilitate data compression.
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General Electric Company
Herrmann Eric P.
Kurdyla Ronald H.
Moore David K.
Tripoli Joseph S.
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