Некоторые вопросы об использовании Zxing...
Я пишу следующий код для чтения штрих-кода с изображения:
public class BarCodeDecode
{
/**
* @param args
*/
public static void main(String[] args)
{
try
{
String tmpImgFile = "D:\\FormCode128.TIF";
Map<DecodeHintType,Object> tmpHintsMap = new EnumMap<DecodeHintType, Object>(DecodeHintType.class);
tmpHintsMap.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
tmpHintsMap.put(DecodeHintType.POSSIBLE_FORMATS, EnumSet.allOf(BarcodeFormat.class));
tmpHintsMap.put(DecodeHintType.PURE_BARCODE, Boolean.FALSE);
File tmpFile = new File(tmpImgFile);
String tmpRetString = BarCodeUtil.decode(tmpFile, tmpHintsMap);
//String tmpRetString = BarCodeUtil.decode(tmpFile, null);
System.out.println(tmpRetString);
}
catch (Exception tmpExpt)
{
System.out.println("main: " + "Excpt err! (" + tmpExpt.getMessage() + ")");
}
System.out.println("main: " + "Program end.");
}
}
public class BarCodeUtil
{
private static BarcodeFormat DEFAULT_BARCODE_FORMAT = BarcodeFormat.CODE_128;
/**
* Decode method used to read image or barcode itself, and recognize the barcode,
* get the encoded contents and returns it.
* @param whatFile image that need to be read.
* @param config configuration used when reading the barcode.
* @return decoded results from barcode.
*/
public static String decode(File whatFile, Map<DecodeHintType, Object> whatHints) throws Exception
{
// check the required parameters
if (whatFile == null || whatFile.getName().trim().isEmpty())
throw new IllegalArgumentException("File not found, or invalid file name.");
BufferedImage tmpBfrImage;
try
{
tmpBfrImage = ImageIO.read(whatFile);
}
catch (IOException tmpIoe)
{
throw new Exception(tmpIoe.getMessage());
}
if (tmpBfrImage == null)
throw new IllegalArgumentException("Could not decode image.");
LuminanceSource tmpSource = new BufferedImageLuminanceSource(tmpBfrImage);
BinaryBitmap tmpBitmap = new BinaryBitmap(new HybridBinarizer(tmpSource));
MultiFormatReader tmpBarcodeReader = new MultiFormatReader();
Result tmpResult;
String tmpFinalResult;
try
{
if (whatHints != null && ! whatHints.isEmpty())
tmpResult = tmpBarcodeReader.decode(tmpBitmap, whatHints);
else
tmpResult = tmpBarcodeReader.decode(tmpBitmap);
// setting results.
tmpFinalResult = String.valueOf(tmpResult.getText());
}
catch (Exception tmpExcpt)
{
throw new Exception("BarCodeUtil.decode Excpt err - " + tmpExcpt.toString() + " - " + tmpExcpt.getMessage());
}
return tmpFinalResult;
}
}
Я пытаюсь прочитать следующие два изображения, содержащие коды128 и QRCode.
Он может работать для кода 128, но не для QRCode. Любой знает, почему...