In order to create a QR code, you must create a link to the image. I found a website called ‘postimage’ which allows you to create this link:
Here I was able to create an ‘url’ link for one of my images:
I then dropped the link in the box on the QR code website (http://www.qrstuff.com/) which then transformed my link into a QR code:
I was able to chose the colour of the QR code, deciding on red – to match the doll which it represented.