发明名称 |
Compaction and decompaction of non-coded information bearing signals |
摘要 |
Image or character data in the form of a rectangular array of binary 1s and 0s (bits) are divided into a plurality of segments, such as thirty-two by thirty-two bit segments or one bit by eight bit or byte segments. The image data is scanned for identifying all-zero segments (background) which are ignored and non-zero segments (foreground) which are transmitted or stored with offset and length (number of successive non-zero segments). The compacted image data is suitably indexed for facilitating image expansion using simple techniques. All compaction and decompaction machine operations are independent of bit-significant informational content of the segments. Presentation of the uncompacted data uses any printer or display type of device.
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申请公布号 |
US4555802(A) |
申请公布日期 |
1985.11.26 |
申请号 |
US19830456920 |
申请日期 |
1983.01.10 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
FEDAK, JOHN F.;FINDLEY, GERALD I.;TORR, TERRY A. |
分类号 |
H04N1/41;G06K15/00;G09G5/42;H04N1/415;(IPC1-7):G06K9/00;H04N7/12 |
主分类号 |
H04N1/41 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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