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# What are the individual metrics used for 1D Readability?

Below is a list of the metrics calculated for 1D Readability quality assessment. For more detailed information on this code quality standard and its metrics, see the DataMan Communications and Programming Guide.

- Multi Scan Int (Multi-scan Integrity) is a measurement of the decodability of the symbol you get by combining multiple scans of the symbol. The higher the measurement, the higher the grade.

- Edge Contrast Minimum is the lowest difference between bar reflectance and space reflectance of two adjacent elements, which gives an indication of edges sharpness. The greater the difference, the higher the grade.

- Reflectance Minimum is the lowest reflectance value in the scan, a measure of the darkest part of the barcode. The lower the value, the higher the grade.

- Print Growth measures the deviation of bar and space width from the intended widths (indicated in the symbology specification), that is, it measures if bars are narrower/wider compared to spaces in the symbol. The higher the difference, the lower the grade.

- Symbol Contrast is the difference between the highest and lowest reflectance values of a scan (the difference in reflectance between the darkest bar and the lightest space). The grade is higher with a greater the difference.

- Single Scan Int (Single-scan Integrity) is a measurement of the decodability of the symbol with a single scan. The decodability is lower if multiple locations of the barcode are damaged.

Note: DM050, DM060, DM070, DM080, DM150, DM260, DM280, DM290, DM300, DM360, DM370, DM380, DM390, DM470, DM503, DM580, MX-1000, MX-1500