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A single stream can be compressed and encoded using multiple methods.
This property reflects the primary compression type used by the
stream.
Compression types which result in high levels of compression (e.g. JPEG) are considered more important than those that do not (e.g. ASCII
85).
The CompressionType enumeration may take the following values:
- None
- Unknown
- Flate
- Lzw
- Ccitt
- Jpeg
- Jpx
- AsciiHex
- Ascii85
- RunLength
- Jbig2
- Crypt
More details of these compression types can be found in Section
3.3 of the Adobe PDF Specification.
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