Appendices
I-10
MicroHAWK V320-F / V330-F / V420-F / V430-F Barcode Reader User Manual
I-6 ISO/IEC 15415 Symbol Quality
Output
Symbol Quality Parameters for 2D Symbols Specified by ISO/IEC 15415
Supported Symbologies:
• Data Matrix ECC 200
• QR Code
• Micro QR Code
Minimum Resolution: 6.0 Pixels Per Element
I-6-1 Aperture
Definition: The size of aperture to use for grading configured as a percentage of
the nominal narrow element width for the symbol under evaluation. For
example, if you have a 15 mil symbol and you wish to grade using a 10
mil aperture you would configure the aperture to 67% (10/15 = 0.67).
Serial Cmd: <K725, aperture, overall, contrast, modulation, reflectance margin, fixed
pattern damage, axial non-uniformity, grid non-uniformity, unused ECC>
Default: 80%
Options: Any number between 0 to 100%
I-6-2 Overall
Definition: Overall is calculated in accordance with the ISO 15415 specification.
The overall grade is the lowest individual parameter grade seen during
the individual scan.
When enabled, the Overall is attached to the symbol output data as a
value.
Serial Cmd: <K725, aperture, overall, contrast, modulation, reflectance margin, fixed
pattern damage, axial non-uniformity, grid non-uniformity, unused ECC>
Default: Disabled
Options: 0 = Disabled 1 = Enabled
I-6-3 Contrast
Definition: Contrast measurements assume 8-bit 0 to 255 grey correlate to 0 to
100% reflectance. Contrast is calculated in accordance with the ISO
15415 specification. The Contrast grading is defined as follows.
A (4.0) if C
≥ 70%
B (3.0) if C
≥ 55%
C (2.0) if C
≥ 40%
D (1.0) if C
≥ 20%
F (0.0) if C
< 20%
When enabled, the Contrast is attached to the symbol output data as a
value.
Serial Cmd: <K725, aperture, overall, contrast, modulation, reflectance margin, fixed
pattern damage, axial non-uniformity, grid non-uniformity, unused ECC>
Default: Disabled
Options: 0 = Disabled 1 = Enabled
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