I was wondering if it is possible to create a QR in some file format, say png, and then encode png to QR so that the resulting QR is the same from which you started?
As indicated in free space, it is not possible to encode an image in the same image for several reasons.
I created a QR code containing a url that contains (again) the original image:
http://qr.ai/qqq
I really think the closest you can get.
. QR- .
, QR-, , , , .
QR- 21x21 177x177. 152 31 000 . , 1 "", , , , .
, . , - , , , , , , . , qr qr .
. , , , - . , - , , , , . .
QR- max. 4296 . , unicode, . , QR- 7089 , (, qr-).
The only problem here is that most QR readers expect qr codes to contain text (not image data).