Calculating the position of QR Code alignment patterns

Question

I need to know how to calculate the positions of the QR Code alignment patterns as defined in the table of ISO/IEC 18004:2000 Annex E.

I don\'t understand how it\'s

Answer 1

sorry about my English. I hope this can help you, and not to later reply. first things, the standard forget a important thing is that the top left is define with (0,0). the { 6, 26, 50, 74 } means the alignment points row coordinate and col coordinate, and I don't know why they do like this, maybe for save space. but we combine all the values for example the:

{ 6, 26, 50, 74 }

and we get :

{ 6 , 6  } ---> ( the x coordinate is 6, and the y is 6, from top/left )
{ 6 , 26 }
{ 6 , 50 }
{ 6 , 74 }
{ 26, 26 }
{ 26, 50 }
{ 26, 74 }
{ 50, 50 }
{ 50, 74 }
{ 74, 74 }

those point's are the actual coordinate of alignment patterns center. Ps: if a position has the position detection patterns, we ignore output alignment, like the position (6, 6).

I also have this question before, but now, I solve it, so I hope you can solve it too.

good luck~