Balluff BVS ID-M1280 F1 Series, Configuration Manual

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BVS ID-M1280xF1-xx-xxx
english 37
Structure of the quality result string of 2D code types borrowing from ISO/IEC TR 29158
The string with the format a (bcdefghij) indicates the determined quality which has the following meaning:
Index Characteristic Description
a Overall quality The minimum or worst quality of all characteristics.
b Cell 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 "Contrast" of ISO/IEC 15415.
c Cell modulation
The measure of the amplitude between two symbols specifies how reliable they
can be distinguished. Calculation of this characteristic differs from calculation of
"Modulation" of ISO/IEC 15415.
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.
Unicode characters
For including Unicode characters into the encoded value, these characters must be represented by means of
the variable-length UTF-8 encoding. When preceding the UTF-8 byte order mark (BOM) 0xEF,0xBB,0xBF
sequence, this BOM sequence is not included in the decoded value. If an Extended Channel Interpretation (ECI)
prefix is present in the encoded value, this prefix is decoded as the string
\nnnnnn
into the output value. For
UTF-8 encoded values, this string is defined by
\000026
.