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A-61124 March 1999 3-1
3 Image Headers
Image header contents
This chapter provides an overview of the type of information
generated during the scanning process, and how to retrieve
images and headers.
The scanner collects the following information for each document
scanned:
Document number (Sequential ID Number)
The scanner assigns a unique Sequential ID Number to each
document. This number may be initialized by the host computer
using a scanner-unique command.
Image size
The scanner records the number of bytes required to store the
scanned document image.
Document level
The scanner assigns a document level to the scanned document
in one of the following ways:
• Press one of the Level Keys (I, II, III) on the control panel.
• Execute function code F94 (Level 1), F95 (Level 2), F96
(Level 3), or F07 (Level 0).
• Use the Footswitch accessory, if it is installed and enabled.
• Use a patch, if the Patch Reader accessory is installed and
enabled.
NOTE: If you do not use one of the methods above to assign a
document level, the level will be determined by the
mode defaults.
For example, assume the mode defaults assign a Level
2 to a document that follows a Level 3 document; and a
Level 1 to a document that follows a Level 2 document.
If the last document was assigned a Level 3, then the
current document is assigned a Level 2.
Mode
The scanner records the current operating mode that was
selected for the application.
Line length
The scanner records the number of pixels-per-line in an image.
Page length
The scanner records the number of lines-per-page in an image.