Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

I don't see anything on your blog about how that QR code can possibly work (I just scanned it, it does work, but my eyes tell me that's impossible)

You have any background on how that QR was constructed?



The very short explanation:

* Split source image into red, green, and blue channels

* Run through the halftone qr generator[0]

* Recombine resulting QR codes into an RGB image

* Average combined QR codes with the source image

I'll probably post an article walking through the process using imagemagick some time next in August.

0. http://vecg.cs.ucl.ac.uk/Projects/SmartGeometry/halftone_QR/...




Consider applying for YC's Fall 2026 batch! Applications are open till July 27.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: