6/29/2023 0 Comments 2d barcode![]() 2įor 1D barcodes, the first three parameters tested are minimum reflectance, decode, and minimum edge contrast. The less error correction used, the better the grade.Ī form of symbol contrast used for direct parts marking (DPM) barcodes.Ī form of modulation used for DPM barcodes.Įach parameter is graded numerically on a scale of 0 to 4 or with a letter grade of A, B, C, D, or F, with F representing failed barcode verification. Refers to the incorrect scaling of the barcode.Īssesses the most significant deviation from the grid.Ĭomputes the amount of error correction required to reconstruct lost data due to poor printing or damage. The quality of the squares and dots around the perimeter as well as the quiet zone. A poor reflectance margin may result in an element being incorrectly designated as dark or light. This indicates how distinguishable the elements of the symbol are. This refers to the ability of the scanner to decode the information present on the barcode based on the sequence of the bars and spaces. The amount of space to the left and right of the barcode.Ī measure of the contrast between the brightest space on the barcode and the darkest bar.Ī measure of the local variations in contrast. The most apparent change in darkness within a bar or space. Measures the contrast between adjacent bars and spaces. Measures how close the scan reflectance profile is to failing the “decode” parameter. The darkest bar in the barcode should have a reflectance of less than half of the background. Indicates the objective darkness of the bars. ![]() Refers to how the scanner’s laser perceives the edge of the barcode (where the lines end and the spaces begin). So, how is barcode grading performed and quality assessed?īarcode quality is graded based on many parameters, depending on whether it’s a 1D or 2D barcode: 1 Updated in 2016, the international standard for barcode quality ensures that barcodes used by manufacturers and their customers meet rigorous testing criteria.
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