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twostraws / CodeScanner

A SwiftUI view that is able to scan barcodes, QR codes, and more, and send back what was found.
MIT License
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QR Code Rate of recognition AVCamBarcode vs. CodeScanner #124

Closed ralfebert closed 4 months ago

ralfebert commented 5 months ago

The Apple example project AVCamBarcode (https://developer.apple.com/documentation/avfoundation/capture_setup/avcambarcode_detecting_barcodes_and_faces) seems to do a few tricks to improve recognition of QR codes and seems to recognize small codes significantly better than CodeScanner.

A starting point could be the CameraViewController#setRecommendedZoomFactor method in the example project. But I am not sure if this is what makes the difference / there might be something else that improves the rate of recognition here – the example project doesn't use CIDetector at all.

Unfortunately I have no more time to investigate this further, the solution for my client will probably be "print bigger QR codes", just wanted to document our findings here.

karolbielski commented 4 months ago

I opened PR https://github.com/twostraws/CodeScanner/pull/127 that applies zoom factor and chooses wide angle camera if possible.