read multiple qrcode in one image

[sunthree74]

can this library read/scan multiple qrcodes in one image?

i want to use this library to read multiple image .

[alvaro-octal]

Hi,

I'm currently looking for something like that (without luck). A workaround could be to:

1. Insert image en detect QR.
2. Get the Result points of the obtained QR.
3. Suppress that part of the image by replacing those pixels by white for example.
4. Repeat the process until there are not QR codes detected.

Has anyone found a better solution?

[xzessmedia]

Hi,

I'm currently looking for something like that (without luck). A workaround could be to:

1. Insert image en detect QR.

2. Get the `Result` [points of the obtained QR](https://github.com/khanamiryan/php-qrcode-detector-decoder/issues/48#issuecomment-425385415).

3. Suppress that part of the image by replacing those pixels by white for example.

4. Repeat the process until there are not QR codes detected.

Has anyone found a better solution?

nice idea, but this will not work.. otherwise you would have your solution ;) The problem is: Those codes have to be placed centered to get recognized correctly..

I can not share my approach but i was succesfully this way:

• Use Machine Learning Object Detection like Yolo or Tensorflow and use a special trained model, trained for codes..
• Crop the detected rectangles, convert to black / white, apply treshhold filter so only black and white colors (#000 + #fff) are left
• Invert it and Crop again to filter out everything outside the shape, i also calculated the rotation and rotated the cropped snipped
• Take those pieces and throw through ZXing or DMTX.

Now you can detect hundreds or maybe thousands of codes depending on your treshhold of your object detection and scan them all!