Siemens SIMATIC MV500 - 3.2.5.2 ISO;IEC 15415

Image processing
3.2 Code verification
SIMATIC MV500
54 Operating Instructions, 03/2021, C79000-G8976-C494-05
Quality features
• Axial non-uniformity:
Difference between the height and width relative to the rows and columns.
• Print growth:
Positive or negative size ratio of the printed cells relative to the ideal grid.
• Contrast:
Difference between the average reflectance of the lightest pixels and the darkest pixels.
• Unused error correction:
Proportion of error correction information not used for correction of the read result.
Table 3- 2 Assignment of the numeric grade of ISO/IEC 16022 to the quality grades
Quality features
(abbreviation)
Quality grades
Comment
4
3
2
1
0
Axial non-uniformity (AN_)
≤ 6 %
≤ 8 %
≤ 10 %
≤ 12 %
> 12 %
--
Print growth (PG_)
≤ 15 %
≤ 21 %
≤ 26 %
≤ 30 %
> 30 %
Absolute value for x and y
Contrast (SC_)
≥ 70 %
≥ 55 %
≥ 40 %
≥ 20 %
< 20 %
--
Unused error correction (UEC)
≥ 62 %
≥ 50 %
≥ 37 %
≥ 25 %
< 25 %
--
3.2.5.2 ISO/IEC 15415
This standard is a specification for testing the print quality of barcodes for two-dimensional
symbols.
The ISO/IEC 16022:2006 document relates to this standard in the guidelines for print quality.
The functions described in the ISO/IEC 15415 standard "5 Scan Average" and "Extended
Reflectance Check" are not supported by the verifiers of the SIMATIC MV540 series.
Quality features
• Axial non-uniformity:
Difference between the height and width relative to the rows and columns.
• L/F border violation:
Measure of the errors in the borders of the data matrix and all errors in the quiet zone
around the code necessary for decoding.
• Grid non-uniformity:
This is the deviation of the measured grid relative to the ideal grid starting from the four
corners of a data matrix.
• Modulation:
Measurement of the uniformity of the reflectance of the dark and light cells of the data
matrix.