search

piderman314 / bardecoder

Detect and decode QR Codes, written in 100% Rust.
MIT License
275 stars 34 forks source link

Error decoding QR Code: Mode 1101 not yet implemented. #33

Closed jmshrv closed 3 years ago

jmshrv commented 3 years ago

I'm trying to use bardecoder to scan a QR code on a camera. When scanning the QR code, I get the error Mode 1101 not yet implemented". I found the message in src/decode/qr/data.rs, but I can't tell what QR formats are supported.

jmshrv commented 3 years ago

Here's the QR I'm decoding btw

Screenshot_1612904102

piderman314 commented 3 years ago

Hey, thanks for your report. I've had a look and the issue stems from the fact that your image is larger than bardecoder is setup to deal with by default. This results in the library thinking the data is corrupted while it is not. There are two things you could do:

1) Resize the image before passing it to the library. I've tested it with 25% size and this works. This has the added benefit that the library will be a lot faster in processing the image.

2) You can modify the parameters of the library. You can see an example of this in the Modified section of the README. I was able to decode your image if I set the parameters of BlockedMean to 11, 13. This helps in processing a larger image by looking at larger subsections at a time so it doesn't get confused by only looking at white or black parts.

Please let me know if you require further assistance.

jmshrv commented 3 years ago

Thanks, this was actually just a screenshot of my QR code, I'm actually holding it up to a camera to scan it. I think my issue was that I was putting too much data in the QR code, causing decoding to mess up. Instead of using json, I'm just sending the values separated by a comma, which greatly reduced size. Thanks for your help :)