DotCode is two-dimensional (2D) matrix barcode invented in 2008[1] by Hand Held Products company to replace outdated Code 128. At this time, it is issued by Association for Automatic Identification and Mobility (AIM) as “ISS DotCode Symbology Specification 4.0”.[2] DotCode consists of sparse black round dots and white spaces on white background. In case of black background round dots, creating barcode, can be white. DotCode was developed to use with high-speed industrial printers[3] where printing accuracy can be low. Because DotCode by the standard does not require complicated elements like continuous lines or special shapes it can be applied with laser engraving or industrial drills.
DotCode can be represented as rectangular array with minimal size of each side 5X dots. Maximal size of DotCode is not limited by the standard[4] (as Code 128 is not limited) but practical limit is recommended as 100x99[2]: 5.2.1.4 which can encode around 730 digits, 366 alphanumeric characters or 304 bytes.
As an extension of Code 128 barcode, DotCode allows more compact encoding of 8-bit data array and Unicode support with Extended Channel Interpretation feature. Additionally, DotCode provides much more data density and Reed–Solomon error correction which allows to restore partially damaged barcode. However, the main DotCode implementation, the same as Code 128, is effective encoding of GS1 data[5] which is used in worldwide shipping and packaging industry.
^Andrew Longacre, Jr. (13 February 2008). "United States Patent US20090200386A1 by Hand Held Products Inc "Machine readable 2D symbology printable on demand"". patents.google.com. United States Patent and Trademark Office. US20090200386A1.
optical codes" Chinese Patent CN113297872A by Fuzhou Symbol Information Technology Co ltd "Dotcode identification method and equipment" DotCode barcode...
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