Swetake writes: How to create a QR Code

The below figure is a structure of QRcode model2 version 1.
In the below figure,white or black parts are fixed in specification.
They are "finder pattern" and "timing pattern".
"Finder pattern" is used to help detection a position of QRcode in decoder application.
"Timing pattern" is used to help determine a symbol's coordinate in decoder application.

In yellow color parts,encoded data (including error correct code) are stored.
And in cyan color parts,information of error correcting level and mask pattern(described later) are stored.This is called format information




■encoded data (including error correct code)
■format information

In addition, version2 or higher has "alignment pattern" which is used to correct skewness in decoder application.
And version 7 or higher has "version information" which has information of version itself.