Banner PresencePLUS P4 COLOR Series - Manual (Page 224)

Note: When the tool times out, it may have decoded part of the string before the time ran out. This partial decoding
is reported back as the Decoded String. In OCV, whenever a timeout occurs, it is considered NO MATCH even
if the returned Decoded String matched Expected String.
7.5.8 Optical Character Verification (OCV) Tool
Optical character verification (OCV) is very similar to the OCR tool regarding decoding an image and building the
Font Library. However, where OCR always feeds back what it decodes, the OCV tool simply provides success/failure
results; that is, OCV simply indicates whether or not an expected character string matches a decoded string. If the
strings match, then the result is Success. If the strings do not match, then the result is Failure.
Usage
The OCV Vision Sensor tool can be used:
• to ensure that the correct lot or date code is printed on a label or package.
• to ensure that the right labels are placed on the appropriate packages.
• verify string with a string that is received from Industrial Protocols.
Fields
The following are fields on the OCV tool Input tab:
• Should I Use OCR or OCV? on page 225
• Decoded String Field on page 226
• Trainer on page 227
Supported Platforms
Banner Engineering Corp. Minneapolis, MN USA 224
2/2010 PresencePLUS Software Tools