Apple Vision - Barcode Detection Doesn't Work for Barcodes with Different Colours

ARKit – Detect similar objects but with different colours

ML-algorithm of ARKit detects a pre-scanned objects (in .arobject container) in black-and-white scheme, not in RGB colour scheme. If you scan two absolutely similar volumetric objects but with a different colour scheme, there's no any guarantee ARKit will recognise each of them successfully.

Firebase Barcode Scanner for IOS

Your logic for a successful scan is a little off: you need to print the features after your guard

func scanBarcode(userImage: UIImage){
    print("SCAN")
    let format = VisionBarcodeFormat.all
    let barcodeOptions = VisionBarcodeDetectorOptions(formats: format)
    var vision = Vision.vision()
    let barcodeDetector = vision.barcodeDetector(options: barcodeOptions)
    let visionImage = VisionImage(image: userImage)
    barcodeDetector.detect(in: visionImage) { features, error in
        guard error == nil, let features = features, !features.isEmpty else {
            print("unsuccessful scan, either there is an error, or features is empty")
            return
        }
        print("successful scan")
        print(features)
        // ...
     }
}

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