com.google.zxing.NotFoundException exception comes when core java program executed?

Question

I have a jpeg file which has 2D bar code. Image resolution is 1593X1212. I am using xing library to decode this barcode from image. I got following code on net.

Answer 1

It is normal; it just means no barcode was found. You haven't provided the image, so I can't say whether your image is even readable, let alone has a supported barcode format.

Answer 2

Already this code if you use,

public static String readQRCode(String filePath, String charset, Map hintMap)
throws FileNotFoundException, IOException, NotFoundException {

    BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(
        new BufferedImageLuminanceSource(
            ImageIO.read(new FileInputStream(filePath)))));

    Result qrCodeResult = new MultiFormatReader().decode(binaryBitmap, tmpHintsMap);

    return qrCodeResult.getText();
}

public static String readQRCode(String filePath, String charset, Map hintMap)
throws FileNotFoundException, IOException, NotFoundException {

    BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(
        new BufferedImageLuminanceSource(
            ImageIO.read(new FileInputStream(filePath)))));

    Result qrCodeResult = new MultiFormatReader().decode(binaryBitmap, tmpHintsMap);

    return qrCodeResult.getText();
}

To make changes of this code. its conformly working,

public static String readQRCode(String filePath, String charset, Map hintMap)
throws FileNotFoundException, IOException, NotFoundException {
    Map < DecodeHintType, Object > tmpHintsMap = new EnumMap < DecodeHintType, Object > (
        DecodeHintType.class);

    //tmpHintsMap.put(DecodeHintType.TRY_HARDER, Boolean.FALSE);
    //tmpHintsMap.put(DecodeHintType.POSSIBLE_FORMATS, EnumSet.allOf(BarcodeFormat.class));
    tmpHintsMap.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);

    BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(
        new BufferedImageLuminanceSource(
            ImageIO.read(new FileInputStream(filePath)))));

    Result qrCodeResult = new MultiFormatReader().decode(binaryBitmap, tmpHintsMap);

    return qrCodeResult.getText();
}

Answer 3

I have adjusted target resolution in ImageAnalysis and it started to work.

From

ImageAnalysis imageAnalysis =
        new ImageAnalysis.Builder()
                .setTargetResolution(new Size(mySurfaceView.getWidth(), mySurfaceView.getHeight()))
                .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
                .build();

to this one

    ImageAnalysis imageAnalysis =
            new ImageAnalysis.Builder()
                    .setTargetResolution(new Size(700, 500))
                    .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
                    .build();

Answer 4

This solution works for me. I hope this help you. I replace reader.decode(...) with reader.decodeWithState(...)

        MultiFormatReader reader = new MultiFormatReader();// use this otherwise

        Result result = reader.decodeWithState(bitmap);

Answer 5

That exception is thrown when no barcode is found in the image:

http://zxing.org/w/docs/javadoc/com/google/zxing/NotFoundException.html

Answer 6

I had the same problem. I used an image that I knew had a valid QR code and I also got the com.google.zxing.NotFoundException.

The problem is that the image you use as a source is to large for the library to decode. After I reduced the size of my image the QR code decoder worked.

For the purpose of my application, the QR code on the image would always be more or less in the same area, so I used the getSubimage function of the BufferedImage class to isolate the QR code.

     BufferedImage image;
     image = ImageIO.read(imageFile);
     BufferedImage cropedImage = image.getSubimage(0, 0, 914, 400);
     // using the cropedImage instead of image
     LuminanceSource source = new BufferedImageLuminanceSource(cropedImage);
     BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
     // barcode decoding
     QRCodeReader reader = new QRCodeReader();
     Result result = null;
     try 
     {
         result = reader.decode(bitmap);
     } 
     catch (ReaderException e) 
     {
         return "reader error";
     }