Rockwell Automation 5370-OCR2 PAK - Manual (Page 34)

Chapter 4
OCR Tool Configuration
4–15
Each string of the OCR Tool operates in one of four modes. Use the
following to determine the operating mode you require:
•
Disabled indicates that the string is not used.
•
OCR Strict is used to read text. The text is not tested against a match
string. When a printed character correlates with two or more taught
characters, a confusion character ”?” is inserted into the result string.
In OCR Strict mode, the string will pass if one or more characters are
recognized and will fail if no characters are recognized.
•
OCR is used to read text. The text is not tested against a match string.
When a printed character correlates with two or more taught characters,
the character with the largest correlation area is inserted into the result
string. If a printed character correlates with more than 4 taught
characters, a confusion character ”?” is inserted into the result string.
In OCR mode, the string will pass if one or more characters are
recognized and will fail if no characters are recognized.
Taught Patterns Inspected Character
Correlation Areas
Character is read as an 8
in OCR mode due to the
larger correlation area.
•
OCV Strict compares an entered match string against inspected strings.
When a printed character correlates with two or more taught characters, a
confusion character ”?” is inserted into the result string. The presence of
a confusion character may not prevent a match, depending upon the use of
metacharacters. Refer to page 6–3 for metacharacter descriptions. In
OCV Strict mode, the inspected string will pass if it matches the user
defined match string and will fail otherwise.
Select Operating Mode