Facsimile and static presentation processing – Facsimile – Reduced time or bandwidth for static image communication
Reexamination Certificate
2006-08-01
2006-08-01
Pokrzywa, Joseph R. (Department: 2627)
Facsimile and static presentation processing
Facsimile
Reduced time or bandwidth for static image communication
C382S239000, C382S244000
Reexamination Certificate
active
07085020
ABSTRACT:
A plurality of patterns such as half-tone patterns, solid patterns, edge patterns, and verbatim data are losslessly represented in a compressed raster data stream. A pattern selection module selects among the various patterns to provide the best combination of lossless representations according to particular criteria such as storage compactness. Half-tone patterns are compressed by exploiting the characteristics of the half-tone threshold screen used to generate the half-tone image. A half-tone pattern codebook is produced by half-tone screening a calibration image. A packet formatting module packs multiple pattern identifiers and lossless representations into a packet which may be transmitted compactly. Upon receipt, a packet deformatting module unpacks the pattern identifiers and lossless representations from the packet. After deformatting, a pattern decoding module uses the pattern identifier to activate appropriate pattern generation modules. Each pattern generation module regenerates data according to an indicated pattern to recreate the original raster data.
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Papanikolaou Athanasios
Pokrzywa Joseph R.
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