Cognex DataMan - Page 42

Property Type 1DStandards 2D Standards Description
modulation
Metric ISO/IEC 15416 ISO/IEC15415
(DataMatrix, QR),
AIM/DPM ISO/IECTR-
29158 (DataMatrix, QR)
The modulation.
Modulation measures
how easily separable
light cells are from
dark cells in a code.
Somewhat similar to
contrast, higher
modulation is better,
and low modulation
can lead to difficulty
telling light cells from
dark ones. Low
modulation can
indicate poor lighting,
a code which is
difficult to read due to
similarities between
the print and the
background, or that a
printer is performing
poorly.
fixedPatternDamage
Metric ISO/IEC15415
(DataMatrix, QR),
AIM/DPM ISO/IECTR-
29158 (DataMatrix, QR)
The fixed pattern
damage. Fixed
pattern damage is a
measure of how much
of the fixed patterns
around the outside of
the code (the solid
finder patterns and
the alternating
clocking patterns) are
intact. If the fixed
patterns are
damaged, then the
code may be difficult
to find at all, let alone
decode. A poor fixed
pattern damage score
usually indicates a
code which has been
damaged or
smudged, or it
indicates a quiet zone
violation.
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DataMan Application Development