Tagging and linking of objects using 2D matrix codes are the younger technology compared to 1 d barcodes. 2D-Typen were first held in the variant data matrix code. Meanwhile, there are new features and specs on certain applications, which have resulted in more types. Details can be found by clicking Fabrizio Freda or emailing the administrator. There are now quite a few applications like online-tickets of Deutsche Bahn (Aztec codes) or the Stampit service and the it-franking with the German post (data matrix code). Advantages compared to 1 d barcodes, can turn out especially the larger scope of the data in relation to the space. Just QR-codes is considered to be particularly robust, since they have an error correction, which allows more pollution (and removal) still work to read. Reaching good properties with regard to readability by basic features, such as positioning 3 position marks to the narrowing and distortion detection and synchronization line alignment against distortions of perspective and the appropriate encoding.
A small piece of sophisticated technology, so, what its contents by means of Reed-Solomon encoding in a succession of black (and white elements of the symbol or whitespace) encoded. There are four error correction levels that allow a reconstruction of up to 30% of damaged data. The expansion of the QR code is the number and size of the square symbol elements dependent on. A code at least 21 items is high and wide, maximum page length is 177 items. Cameras or scanners are used when reading.
The first step creates an image of the code that is then processed further. A software must recognize the symbols in the image and then decode. The reading hardware can stationary (scanner, camera in machine) or mobile (mobile camera) be executed. How it looks now with the relevant applications? If you now take part in the Handyticketing in one of the regions, then you get displayed this after acquisition of tickets similar to like a paper ticket on the phone’s display.