Meziantou.FrameworkPdfBilevelCompression Enum
The compression of a bilevel image (PdfImage.FromBilevel). Every compression is lossless.
public enum PdfBilevelCompressionFields
| Name | Value | Description |
|---|---|---|
CcittGroup4 | 0 | CCITTFaxDecode with Group 4 coding (ISO 32000-2, 7.4.6; ITU-T T.6): the compression of fax machines and scanners, which every PDF reader decodes. |
Jbig2 | 1 | JBIG2Decode (ISO 32000-2, 7.4.7; ITU-T T.88), PDF 1.4: one generic region coded with the arithmetic coder. It is usually smaller than Group 4 coding, especially for halftones and dithered images. The symbol coding of text, which can be lossy, is not used. |
Flate | 2 | FlateDecode of the rows of bits. |