ISO/IEC TR 29158 AIM-DPM-1-2006 Quality Parameters
The ISO/IEC TR 29158 standard is an extension of ISO/IEC 15415 for Direct Part Marking use case.
The following table lists and details the quality parameters for ISO/IEC TR 29158 that the TruCheck™ tab shows in the Runtime step.
| Quality Parameter | Parameter Description | Value Description | Grading | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cell Contrast (CC) | The relative contrast value between bars and spaces. It is the mean value of the light and dark elements. | A percentage of contrast value. |
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| Cell Modulation (CMOD) |
Measures the amount of reflectivity of the modules. The grade is calculated using a formula that compares the reflectivity of each module to the global threshold and the overall symbol contrast. Each module is graded based on the reflectivity of the modules, then error correction capability is calculated to negate one or few elements with low values. |
A percentage of modulation. | |||||||||||
| Distributed Damage Grade (DDG) | Average grade of the fixed pattern elements. | N/A | The result of fixed pattern damage patterns. | ||||||||||
| Minimum Reflectance (MR) | The minimum reflectance between light and dark elements. | A percentage of the lowest value of reflectance between dark and light elements. |
For ISO/IEC TR 29158:2011: Pass/Fail grade (A or F, respectively). The value must be at least 5% for a pass grade. For ISO/IEC TR 29158:2020 and later:
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| Decode |
The parameter checks whether the code can be decoded based on a specific formula. |
The value is a score out of ten. |
Pass/Fail grade (A or F, respectively). |