在 java 服务中使用 Zxing 库从单个图像文件中读取多个条形码

Question

嗨，我已经创建了一个 java 服务，用于从图像读取条形码，我使用 Zxing 库来解码此处的文本，挑战是，如果一个具有单个条形码的文件它工作正常，如果有多个条形码它会产生不相关的结果，我已经给出下面是我的代码。

pom.xml

<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.4.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.4.0</version>
        </dependency>

java 服务

@GetMapping(value = "OCR/GetBarcodeRead")
    @ApiOperation(value = "Get result from Barcode Zxing library")
    public String GetBarcodeRead() throws Exception {

        InputStream barCodeInputStream = new FileInputStream("images/multiple.jpg");
        BufferedImage barCodeBufferedImage = ImageIO.read(barCodeInputStream);

        LuminanceSource source = new BufferedImageLuminanceSource(barCodeBufferedImage);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Reader reader = new MultiFormatReader();
        Result result = reader.decode(bitmap);

        return result.getText();

    }

结果是这样的

CODE93

带有多个条形码的图像

我应该如何使用 Zxing 库读取和检索给定图像中可用的所有条形码？ 有人可以帮助我实现这一目标吗？提前致谢

解决方法

@GetMapping(value = "OCR/GetBarcodeRead")
    @ApiOperation(value = "Get result from Barcode Zxing library")
    public String GetBarcodeRead() throws Exception {

        InputStream barCodeInputStream = new FileInputStream("images/multiple.png");
        BufferedImage barCodeBufferedImage = ImageIO.read(barCodeInputStream);

        LuminanceSource source = new BufferedImageLuminanceSource(barCodeBufferedImage);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Reader reader = new MultiFormatReader();
        MultipleBarcodeReader multipleReader = new GenericMultipleBarcodeReader(reader);
        Result[] results = multipleReader.decodeMultiple(bitmap);
        //Result result = reader.decode(bitmap);

        return results.toString();

    }

工作代码

@GetMapping(value = "OCR/GetBarcodeRead")
    @ApiOperation(value = "Get result from Barcode Zxing library")
    public String GetBarcodeRead() throws Exception {



        InputStream barCodeInputStream = new FileInputStream("images/K71NM.jpg");
        BufferedImage barCodeBufferedImage = ImageIO.read(barCodeInputStream);

        LuminanceSource source = new BufferedImageLuminanceSource(barCodeBufferedImage);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        com.google.zxing.Reader reader = new MultiFormatReader();
        MultipleBarcodeReader bcReader = new GenericMultipleBarcodeReader(reader);
        Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
        hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
        StringBuilder sb = new StringBuilder();

        for (Result result : bcReader.decodeMultiple(bitmap, hints)) {
            sb.append(result.getText()).append(" \n");
        }


        return sb.toString();

    }

Answer 1

您可以将阅读器包装到 GenericMultipleBarcodeReader 中，并使用返回结果数组的 decodeMultiple：

MultipleBarcodeReader multipleReader = new GenericMultipleBarcodeReader(reader);
Result[] results = multipleReader.decodeMultiple(bitmap);

Reference

Answer 2

public static void main(String[] args) throws Exception {
       
        String path = "./";

      
        //For Read Single Bar Code Image Info
        System.out.println(readSingleBarcodeImageData(path + "generatedBarCodeImage.jpg"));

        //For Read Multiple Bar Code Image Info
        System.out.println(Arrays.toString(readMultipleBarcodeImageData(path + "multipleBarCodeImageDemo.png")));
    }




private static String readSingleBarcodeImageData(String singleImagePath) throws NotFoundException, IOException {
        BufferedImage img = ImageIO.read(new File(singleImagePath));
        BinaryBitmap bb = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(img)));
        MultipleBarcodeReader mbReader = new GenericMultipleBarcodeReader(new MultiFormatReader());
        Hashtable<DecodeHintType, Object> hints = new Hashtable<>();
        hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
        /*List<BarcodeInfo> list = new ArrayList<>();//if have any custom data then convert to dto like this
        for (Result result : mbReader.decodeMultiple(bb, hints)) {
            list.add(new BarcodeInfo(result.getText(), result.getBarcodeFormat().name()));
        }
        return list;*/
        Result[] currentBarCodeResult = mbReader.decodeMultiple(bb, hints);
        return currentBarCodeResult[0].getText();
    }

    private static Result[] readMultipleBarcodeImageData(String multipleImagePath /* if have multiple barcode in an image then*/) throws NotFoundException, IOException {//
        BufferedImage img = ImageIO.read(new File(multipleImagePath));
        BinaryBitmap bb = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(img)));
        MultipleBarcodeReader mbReader = new GenericMultipleBarcodeReader(new MultiFormatReader());
        Hashtable<DecodeHintType, Object> hints = new Hashtable<>();
        hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
        /*List<BarcodeInfo> list = new ArrayList<>();//if have any custom data then convert to dto like this
        for (Result result : mbReader.decodeMultiple(bb, hints)) {
            list.add(new BarcodeInfo(result.getText(), result.getBarcodeFormat().name()));
        }
        return list;*/
        Result[] currentBarCodeResult = mbReader.decodeMultiple(bb, hints);//every result represent a bar code
        return currentBarCodeResult;
    }

**更多详情请按此示例：Single and multiple barcode data read example **