why zxing can not decode this qrcode image? - qr-code

Question

JavaSE: Exception is "com.google.zxing.NotFoundException"
Can any one help me?
The version is 3.4.1
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.1</version>
</dependency>
and the java code is there.
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Map<DecodeHintType,Object> hints = new LinkedHashMap<>();
hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
The Exception info is :
com.google.zxing.NotFoundException
There is not anything other displayed...
But the following code can not be decoded out，It's really weird
Almost identical QR codes, one can be decoded but the other cannot be coded`

Answer 1

Use GenericMultipleBarcodeReader to read the QR code.
public void decodefile(String filename) {
// Read an image to BufferedImage
BufferedImage image = null;
try {
image = ImageIO.read(new File(filename));
} catch (IOException e) {
System.out.println(e);
return;
}
// ZXing
BinaryBitmap bitmap = null;
int[] pixels = image.getRGB(0, 0, image.getWidth(), image.getHeight(), null, 0, image.getWidth());
RGBLuminanceSource source = new RGBLuminanceSource(image.getWidth(), image.getHeight(), pixels);
bitmap = new BinaryBitmap(new HybridBinarizer(source));
MultiFormatReader reader = new MultiFormatReader();
GenericMultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(reader);
try {
Result[] zxingResults = multiReader.decodeMultiple(bitmap);
System.out.println("ZXing result count: " + zxingResults.length);
if (zxingResults != null) {
for (Result zxingResult : zxingResults) {
System.out.println("Format: " + zxingResult.getBarcodeFormat());
System.out.println("Text: " + zxingResult.getText());
System.out.println();
}
}
} catch (NotFoundException e) {
e.printStackTrace();
}
pixels = null;
bitmap = null;
if (image != null) {
image.flush();
image = null;
}
}
Here is my results:
ZXing result count: 1
Format: QR_CODE
Text: https://mp-daily.bookln.cn/q?c=1201M9XUEDE