MicroHAWK Engine Integration Guide 9-11
Symbol Quality
Axial Non-Uniformity (Data Matrix Only)
Unused Error Correction (Data Matrix Only)
Definition: Axial non-uniformity is a measure of how much the sampling point
spacing differs from one axis to another, namely AN = abs (XAVG -
YAVG) / ((XAVG + YAVG)/2) where abs () yields the absolute value. If a
symbology has more than two major axes, then AN is computed for those
two average spacings which differ the most. (ANSI) axial non-uniformity
grading is defined this way:
A (4.0) if AN < .06
B (2.0) if AN < .08
C (2.0) if AN < .10
D (1.0) if AN < .12
F (0.0) if AN > .12
If enabled, the axial non-uniformity is appended to the symbol data
according the ISO/IEC 16022 Symbol Quality Output Mode setting.
Serial Cmd: <K709,symbol contrast,print growth,axial non-uniformity,UEC>
Default: Disabled
Options: 0 = Disabled 1 = Enabled
Definition:
The correction capacity of Reed-Solomon decoding is expressed in the
equation: e + 2d < d - p, where
e
is the number of erasures,
d
is the number
of error correction code words, and
p
is the number of code words reserved
for error detection.
A (4.0) if UEC > .62
B (3.0) if UEC > .50
C (2.0) if UEC > .37
D (1.0) if UEC > .25
F (0.0) if UEC < .25
If enabled, the UEC is appended to the symbol data according to the
ISO/IEC 16022 Symbol Quality Output Mode setting.
Serial Cmd: <K709,symbol contrast,print growth,axial non-uniformity,UEC>
Default: Disabled
Options: 0 = Disabled 1 = Enabled
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