Wounded QR Codes

A look at QR Code resiliency – even when skewed, distorted, blurred and with up to a 30% chunk missing, QR codes can still be readable. The technology behind them is explained.

“The mask is applied via an XOR function and can be removed be applying the same Boolean operation a second time. There are multiple masks available in the standard that can be applied.

An additional alignment block appears in the fourth corner on small codes (in larger codes, multiple alignment blocks appear in the grid). These alignment blocks help deal with the skew. Finally, there are two timing strips in perpendicular directions composed of alternating elements.”

Read More


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s