Image processing
4.2 Code verification
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
53
4.2.4.3 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.
Quality parameters
● Axial non-uniformity:
Difference between the height and width relative to the rows and columns.
● Fixed pattern damage:
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.
● Print growth:
Positive or negative size ratio of the printed cells relative to the ideal grid. Is only
calculated as a reference, no quality grade is assigned.
● Reference decode:
A measurement of the data matrix with the result passed/failed. The measurement is
based on a binary image of the code to ISO/IEC 16022:2006.
● Symbol contrast:
Difference between the highest and lowest reflectance of the data matrix surface.
● Unused error correction:
Proportion of error correction information not used for correction of the read result.
To Next Page
Loading...
