2 ms·

Here's an example to start with: ImageMagick's -threshold or -adaptive-threshold (depending on the image's lighting) are what you want to look at, e.g. try some

by jcynix 1y ago

Here's an example to start with: ImageMagick's -threshold or -adaptive-threshold (depending on the image's lighting) are what you want to look at, e.g. try something like magick input.jpg \ -colorspace Gray \ -adaptive-threshold 8x8+10% \ candidate.png

edoceo 1y ago
And if you wanna go even lower, you'll "raw" read the image pixel by pixel to normalise colour to black/white and then read that matrix for the QR pattern. And then, cause there are some inverted colour QRs, flip and scan again.