Image processing: qr code

How to find the qr code( this plastic card) in this photo, as it has a begining job, I need a coordinate and axis, and that I would be marked with a ractangle?

Answer 1

[Image Analyst]

See attached code.

See if you can do the last part yourself by calling bwboundaries() on cardMask to get the (x,y) coordinates of the card mask.