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V1.0 | IDC200 Operating Manual 55
Determining the barcode quality
Several search beams (1) scan the barcode for evaluation of the above defined quality features.
The average quality of same characteristics of all search beams is determined and output (2).
Furthermore, the worst rated (3) quality feature for each search beam is identified, building the
average for output as overall quality (4).
The overall quality of a barcode may be inferior to that of individual quality features. The reason
for this is that the worst individual scores (3) are included in the overall rating in each case.
Evaluation of quality features (2) does not map the overall quality.
Individual values of search beams rated very poor will entail poor overall quality, though individ-
ual quality features may not be rated worse.
Quality features DataMatrix (ECC200) and QR Code (ISO/IEC 15415 + AIM DPM-1-2006)
Denotation Example Description
Contrast Difference between the modules' maxi-
mum and minimum gray values.
Modulation Amplitude between data code modules
.(Depending on error correction!)
Damage to pattern Incompliant frame pattern finder pattern().
Readability A = Code readable
F = Code was not read
Axial non-conformity Evaluation of module width and height.
Grid non-consistency Evaluation of the tilt angle (perspective
distortion).
Unused error correction Proportion of unused error redundancy.
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