| Storing a
textual image |
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| ¡ | Mostly
bi-level (two-tone) until recently |
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| 1. | CCITT Fax III
and IV |
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| l | Bi-level
transmission and storage standard |
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| l | Optimized for
Roman alphabet |
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| 2. | Textual image
compression |
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| l | Codebook of
marks |
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| l | A level for
access and one for preservation |
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