Microscan Quadrus MINI Imager, Руководство пользователя

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Quadrus MINI Imager User’s Manual
6-43
Symbologies
Single Row
Background
Uncertain Characters
Definition:
Single Row
specifies that the area above and below the OCR string will
not examined. Other text can be above or below the OCR string without
affecting read performance.
Serial Cmd:
<
K461,
status,active template,orientation,
single row
,background,uncertain
characters,strip checksum,special character,passport checksum >
Default:
Disabled
Options:
0 = Disabled
1 = Enabled
Definition:
Background
improves OCR performance when the background on which
OCR text is printed is not a uniform color. This option is recommended for
use with passports, which often have patterns behind their OCR text.
Serial Cmd: <
K461,
status,active template,orientation,single row,
background
,uncertain
characters,strip checksum,special character,passport checksum >
Default:
Disabled
Options:
0 = Disabled
1 = Enabled
Definition: When
Uncertain Characters
is enabled, the imager will decode OCR
strings and include characters that the algorithm is unable to identify.
Uncertain characters are issued as a group, starting with ASCII value 29
(Group Separator), followed by zero or more ASCII characters (the first
being the most likely, followed by decreasingly likely characters). The group
is terminated by another Group Separator character. If there are no characters
between a pair of Group Separator characters, then no possible character
for that position was determined. Counting each uncertain group as a single
character, the total number of characters output will match the length of the
“winning” OCR template.
Important:
This parameter only affects the internal passport template. It is
ignored by all other OCR templates.
Serial Cmd: <
K461,
status,active template,orientation,single row,background,
uncertain
characters
,strip checksum,special character,passport checksum >
Default:
Disabled
Options:
0 = Disabled
1 = Enabled