Efficient encoding/decoding in the decomposition and recompositi

Details Efficient encoding/decoding in the decomposition and recompositi Efficient encoding/decoding in the decomposition and recompositi

1989-06-01

1990-12-18

Coles, Jr., Edward L.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358462, 358467, 358133, H04N 141

Patent

active

049790498

ABSTRACT:
More efficient encoding/decoding in decomposing and recomposing a high resolution image is obtained by employing a unique prediction arrangement. The prediction arrangement determines whether high resolution pixels to be recomposed from low resolution pixels from a low resolution replica of the high resolution are so-called typically predictable or non-typically predictable by using general prediction rules. The general prediction rules are also employed to determine if any of the typically predictable high resolution pixels would be improperly recomposed. Such high resolution pixels which would be improperly recompased are identified as exceptions. It is noted that so-called supplemental information is required to properly recompose non-typically predictable pixels and typically predictable pixels which are identified as exceptions. To this end, exceptions accompany the low resolution pixel for which the corresponding high resolution pixels would otherwise be improperly recomposed.

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R. B. Arps et al., "Progressive Adaptive Bi-Level Image Compression (PBIC) Proposal", ISO/IEC/JTC1/SC2/WG8 JB1G No. 33, Rev. 4, Jan. 25, 1989.
BIS, Japan, "Progressive Coding Method for Bi-Level Images", ISO/JTC1/SC2/WG8 & CCITT SG VIII JB1G N-75, Jan. 1989.
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