Vision Sensor SBSI/SBSC-EN, 8062650 - 1607b - 13/09/2016
Page 141
Vision Sensor Manual
LINEAR:
Q4 Decode
Q5 Symbol Contrast
Q6 Minimal Reflectance
Q7 Minimal Edge contrast
Q8 Modulation
Q9 Defects
Q10 Decodability
Q11 Additional Requirements
COMPOSITE:
Q12 Decode
Q13 Rap Overall
COMPOSITE RAP:
Q14 Contrast
Q15 Minimal Reflectance
Q16 Minimal Edge Contrast
Q17 Modulation
Q18 Defects
Q19 Decodability
Q20 Codeword Yield
Q21 Unused Error Correction
Q22 Modulation
Q23 Decodability
Q24 Defects
The "overall" grade in the group OVERALL is the final symbol grade to be reported. It is
just the lower from the other two in the group: "overall linear" and "overall composite",
which are the overall grades of the linear and the composite sub symbols, respectively.
The other two groups, "LINEAR" and "COMPOSITE", contain the corresponding
individual grades for both sub symbols, and give information for possible causes for poor
quality of the symbol. The grades in the "LINEAR" group correspond to those for the
simple 1D bar code case, described above. The grades in the "COMPOSITE" group
correspond to the grades for a PDF 417 data code symbol, where "rap overall" is called
after the specific, so-called RAP, start/stop pattern of Composite symbols. Additionally,
the sub group "COMPOSITE RAP" expands the individual grades for the reflectance
profile of the RAP patterns. The RAP grades are consistent with the grades for the
simple 1D bar code case explained above.
Quality type
There are existing two possibilities, to display quality parameters. Both are according to
the norm. The grades can be given in values from A to F or from 4 to 0. A and 4 are the
best possible grades. This setting determines how the grades should be displayed. It
affects the display on screen as well as the output over the interfaces.
The assignment is the following:
ABCDF
43210
For newly generated detectors, all parameters are preset as standard values, suitable for many
applications.
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