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Printable CALS Files
135
4
Header Block Conditions
• The header must be 2048 bytes (fixed length).
• Header records must be 128 bytes (fixed length).
• Header records must start with a record ID.
• Specified values for header record IDs must be entered in the separator's two
character spaces: Colon (0x3a) and Space (0x20).
• Header records that contain no directive value must be given “NONE” as
their value.
• Empty bytes in the header record and header block must be padded with
spaces (0x20).
Bitmap image data
Bitmap image data must follow immediately after the header block's final byte
and be of the following format:
ITU-T T.6 monochrome raster (Group 4 Fax).
Note
❒
The same compression format as MMR (Modified Modified Read).