Data (if barcode complicated / special characters / more than one field) |
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Control characters for Code 128, Code 93
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Special ASCII characters 00-31 (Hex 00-1F) and DEL 127 (Hex 7F)
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UCC-128 / EAN-128 Application Idenifier (AI) like SSCC-18 (00) for
Serial Shipping Container Codes
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This animation simply shows how an example QR Code symbol is constructed. |
Circular finder pattern areas are placed in three corners. |
Then a vertical and horizontal timer pattern. |
Format and model information is added around the finder patterns. |
Data codewords are then added. |
Error correction codewords are added. |
The last step applies one of several known masking patterns so that there are fewer large holes (areas with the same colour) - to make image processing during reading more reliable. |
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