2d barcode generation symbologies

In a past article we’ve talked about 2d barcode generators and also mentioned a few of the symbologies used to generate such barcodes. As I’ve stated in that previous article, there are quite a few of 2d barcode generation symbologies, out of which we talked about the:

All of these 2d barcode generation symbologies have a specific way of generating 2d barcodes. For example, the Aztec code requires the usage of an Aztec code rune to be able to generate a 2d barcode. The Code 16k uses 3 sets of parameters – ASCII 1,2 and 2 pairs of digits – besides these parameters it’s actually very important that you specify the quiet zone width (the white zone between the lines) and the actual dimensions of the generated barcode. The Compact, Micro and Macro PDF417 symbologies are quite impressive and are a pretty hard to grasp concept at first. Here’s a little information on what exactly the Compact PDF417 technique is about and when it’s best to use it:

Compact PDF417, or Compact Portable Data File 417, has the same features as PDF417 standard. However, Compact PDF417 may be used where space considerations are a primary concern and symbol damage is unlikely. In an environment where label damage is unlikely (e.g. an office), the right row indicators, that PDF417 Symbols feature, may be omitted and the stop pattern may be reduced to one module width bar. This procedure reduces the non-data overhead from 4 codewords per row to 2 codewords per row, with some trade-off in decode performance and robustness, or the ability to withstand noise, damage, degradation, dust etc. This overhead reduction version is called Compact PDF417, which is fully decoder compatible with standard PDF417

The Semacode is a combination between URL’s and barcodes, here’s a short explanation of what it is exactly:

The fundamental concept of semacode is the URL barcode. A barcode is a machine readable visual tag, and a URL (Universal Resource Locators) is an internet address. Semacode Tag is the encoding of URLs into barcodes based on Data Matrix 2D Symbology.

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