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A-61124 March 1999 3-3
Bar code header information
If the Bar Code Accessory is installed and enabled and a bar
code is detected on the document, the decoded information is
included in the image header.
Bar code information can contain a maximum of 106 ASCII
characters:
• 80 characters of actual data
• 9 delimiters
• a colon
• 14 bytes of image address information
• a line feed
• a null terminator
Samples:
<Bar Code>:<IA><line feed><null>
<Bar Code 1>;<Bar Code 2>;<Bar Code 3>:<IA><line
feed><null>
When using bar code, some situations may require evaluation of
Image Header data and, perhaps, manual cleanup of the
information contained in the header:
• During normal bar code reading, if a bar code is not decoded
properly (i.e., not recognized or only a portion of the code is
recognized), the bar code data will not appear in the image
header. For example, if there are two bar codes on a
document and only the second bar code is read and decoded
properly, only the data contained in the second bar code will
appear in the image header (making it appear as though only
one bar code was placed on the document).
• During partial bar code reading, if a bar code is not decoded
(i.e., not recognized or only a portion of the code is
recognized), a question mark may appear in the image
header. For example, if the start character followed by the
minimum number of characters is readable, the image header
will contain bar code information (corresponding to what has
been successfully read and decoded) followed by a semi-
colon (;) and a question mark (?).
• During reading of multiple bar codes, duplicate bar code
information may be placed in the header.
Image Deskew Flag
If the image was successfully skew corrected, this flag is set to 1
otherwise this flag is set to 0. This requires the Image Manager.
Skew Angle
The scanner will report the detected skew angle from 0 to 44
degrees independent of whether the image was skew corrected.
This requires the Image Manager.