Microscan HawkEye 1500 Series, Verification Manual

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Chapter 3 Data Matrix Verification
3-8 HawkEye™ 1500 Series Verification Manual v2.4.1, Nov 2008
score of unused error correction;count of grade A;B;C;D;F;is this value use to
determine good/fair/poor;minimum level of good;minimum level of fair;unused
error correction this cycle;symbol unused error correction average;contrast
maximum;contrast minimum;pixels per inch;contrast report;cell unit
report;aperture;target calibration contrast;target calibration
reflectance;wavelength;light type;ECC level;calibrated state;code height;code
width;angle;calibrated mean light;calibrated exposure;calibrated gain;calibrated
black offset
Parameters
• Axial Nonuniformity — The difference between the height and the width
with respect to the row.
• Print Growth — The positive or negative size relation of the cells as printed
with respect to the ideal grid.
• Reference Decode — This is a pass/fail measurement of the Data Matrix
based upon a binary image of the code as specified in ISO/IEC 16022 (First
edition - 2000, Second edition - 2006).
• Symbol Contrast — The difference in the population of dark pixels to the
population of light pixels (see Figure 3–6) and compares to AIM DPM-1-
2006 “Cell Contrast”.
• Unused Error Correction — The amount of error correction that could be
read incorrectly when the code is still readable that is currently being read
correctly expressed as a percentages and columns.
ISO/IEC 15415:2004
This standard is a bar code print quality test specification for two-dimensional
symbols. The ISO/IEC 16022:2006 document refers to this standard for its print
TABLE 3–2.
ISO/IEC 16022:2000 Numeric Score to Grade Level Comparison
Grade
A
4 B
3 C
2 D
1 F
0
Comments
SC Symbol Contrast >= 70% >=55% >=40% >=20% <20%
PG Print Growth <=15% <=21% <=26% <=30% >30% Absolute value
for X and Y
AN Axial Nonuniformity <=6% <=8% <=10% <=12% >12%
UEC Unused Error Correction >=62% >=50% >=37% >=25% <25%