How can I read and decode an image with QR code in R programming? I want to transform an image with QR code in text.
R has libraries for generating QR codes as 'package qrcode’ and ‘package qrencoder’. But I need one package or another way for decoding QR code from an image JPG or PNG or BMP or another.
The following image is a QR code of the url for this page (try it out)
To read it, as Wimpel points out, you can try the quadrangle package, which you can install with
library(devtools)
install_github("brianwdavis/quadrangle", INSTALL_opts = "--no-multiarch")
To read the above image, we simply do:
library(quadrangle)
result <- qr_scan("https://i.stack.imgur.com/CrADg.png")$values$value
And we can see the result is correct:
result
#> [1] "https://stackoverflow.com/questions/71592191/how-can-i-read-and-decode-an-image-with-qr-code-in-r-programming/71592356"