
Symbol Readability Index
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7-26 MS-Q Imager User’s Manual
Symbol Readability Index
The Symbol Readability Index provides a measurement of a specific symbol’s readability.
It is specific to the MS-Q Imager and should not be confused with a verification quality
measurement.
The Symbol Readability Index is a blend of information obtained from the internal operations
of the decoding algorithm relating to contrast, symbology construct, error detection, forward
error correction (if applicable), and other symbology-specific characteristics.
The Index is a score on a scale of 1 (very poor) to 100 (very readable). Due to the effects
of motion, skew, reflection, focus, and ambient light, the Readability Index on the same
symbol may vary somewhat from read to read. However, a poor contrast or damaged
symbol will score lower than a high contrast undamaged symbol. The Index can be used
as a quick check on the reliability of label generation or marking systems. When used in
conjunction with a stand and constant ambient light, the Index provides a symbol quality
assurance tool and check-point for feedback to an overall symbol or marking quality
control system.
The Symbol Readability Index is enabled by reading an XML rule into imager memory.
Enable Symbol Readability Index
The imager will store this XML rule and reset, but will not output a Readability Index value
until the Enable Readability Index Output symbol is read. When output is enabled, a
Symbol Readability Index value will be added to all decoded data output.
Example: 100 (symbol readability),1234567890 (symbol data)
The imager will output the Symbol Readability Index for every decode until the feature is
disabled.
Enable Readability Index Output Disable Readability Index Output
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