Balluff BVS ID-M1280 F1 Series, Configuration Manual

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BVS ID-M1280xF1-xx-xxx
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Structure of the quality result string of 2D code types borrowing from ISO/IEC 15415
The string with the format a (bcdefghij) indicates the determined quality which has the following meaning (all
codes besides PDF417):
Index Characteristic Description
a Overall quality The minimum or worst quality of all characteristics.
b Contrast
Describes the difference between the highest and the lowest reflectance values
of the gray value profile. Calculation of this characteristic differs from calculation
of "Cell contrast" of ISO/IEC TR 29158.
c Modulation
The measure of the amplitude between two symbols specifies how reliable they
can be distinguished. Calculation of this characteristic differs from calculation of
"Cell modulation" of ISO/IEC TR 29158.
d
Fixed pattern
damage
Measures and grades any damage to the finder pattern and quiet zone in the
symbol.
e Decode
Binary characteristic of the readability. If it can be decoded, then it will be A
otherwise F. In this implementation it will always be A.
f
Axial
nonuniformity
Measures and grades the spacing of the mapping centers and tests for uneven
scaling of the symbol along the X or Y axis. Reasons for this behavior can be
the print quality or the tilt of the camera.
g
Grid
nonuniformity
Measures and grades the largest vector deviation of the grid intersections,
determined by the theoretical position prescribed by the reference decode
algorithm and the actual measured result.
h
Unused error
correction
Measures and grades the reading safety margin that error correction provides.
i
Reflectance
margin
Comparable with the characteristic "Modulation"; also considers if a module
could be decoded.
For PDF417 the form is a (bcdefg) and has the following meaning:
Index Characteristic Description
a Overall quality The minimum or worst quality of all characteristics.
b
Start/Stop
pattern
The quality of the start and stop patterns.
c Codeword yield Amount of Codewords that are decoded correctly.
d
Unused error
correction
Measures and grades the reading safety margin that error correction provides.
e Modulation
The measure of the amplitude between two symbols specifies how reliable they
can be distinguished.
f Decodability
Describes, how far the true width of the modules differ from the standard of the
code types.
g Defects
Indicates, to what extent irregularities or disturbances occur in individual
symbol modules.