I am working on a QR code encoding/decoding project.
I have been read through the ISO/IEC 18004 (2006) and some tutorials ( http://www.thonky.com/guides/ http://www.matchadesign.com/_blog/Matcha_Design_Blog/post/QR_Code_Demystified_-_Part_1/ http://www.swetake.com/qr/qr1_en.html )
The ISO documentation and those very nice tutorials helped me a lot. But there’s still one thing I can’t understand, that’s how we can calculate the number of data/error blocks when creating a QR code at Version 3 or higher.
The image below is from the ISO/IEC 18004 – 2006:
A version 7-H (H is error correction capacity level ) symbol that has 66 data codewords and 130 error codewords. They split both of them into 5 blocks.
The document says that the n blocks number (in this case n = 5 ) can be calculated from Table 9 (ISO 18004) according to the version and error correction level. But it seems like I can’t get that number. Please show me how I can calculate it.
