printing qr code on ‘contravision’

[Lorraine Clinch]

Hi Gareth, funnily enough I did this exact thing a few weeks ago, never gave it a thought until checking once on the van, and no, doesn’t scan!
I had to print onto vinyl, and remove the CV QR square to put the vinyl on the glass – I assumed that water etc would get in behind the vinyl via the holes.
You could see that the pattern was lost with the dark of the glass.

Lorraine

[Gareth.Lewis]

Thanks Lorraine

[Lorraine Clinch]

You are welcome Gareth. Next time I would put a square of white under the QR code, I don’t think that the layer would notice too much, as the QR code is so heavily patterned. (I think that would work, will have to try!)

[Adam McGuire]

As with a bar code, there is a lot of error correction in a QR code. With a barcode all the scanner has to see is a continuous line of stripes in the reading direction. QR codes are a little different, but even relatively degraded codes are still able to be read. This obviously depends on how much information is encoded.

Interesting question with regards to Contravision, I guess it also depends on which percentage transmission Contravision is used and the QR codes overall size.