/// <summary>
/// Tries to decode barcodes within an image which is given by a luminance source.
/// That method gives a chance to prepare a luminance source completely before calling
/// the time consuming decoding method. On the other hand there is a chance to create
/// a luminance source which is independent from external resources (like Bitmap objects)
/// and the decoding call can be made in a background thread.
/// </summary>
/// <param name="luminanceSource">The luminance source.</param>
/// <returns></returns>
public virtual Result[] DecodeMultiple(LuminanceSource luminanceSource)
{
var results = default(Result[]);
var binarizer = CreateBinarizer(luminanceSource);
var binaryBitmap = new BinaryBitmap(binarizer);
var rotationCount = 0;
var rotationMaxCount = 1;
MultipleBarcodeReader multiReader = null;
if (AutoRotate)
{
Options.Hints[DecodeHintType.TRY_HARDER_WITHOUT_ROTATION] = true;
rotationMaxCount = 4;
}
var formats = Options.PossibleFormats;
if (formats != null &&
formats.Count == 1 &&
formats.Contains(BarcodeFormat.QR_CODE))
{
multiReader = new QRCodeMultiReader();
}
else
{
multiReader = new GenericMultipleBarcodeReader(Reader);
}
for (; rotationCount < rotationMaxCount; rotationCount++)
{
results = multiReader.decodeMultiple(binaryBitmap, Options.Hints);
if (results == null)
{
if (TryInverted && luminanceSource.InversionSupported)
{
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.invert()));
results = multiReader.decodeMultiple(binaryBitmap, Options.Hints);
}
}
if (results != null ||
!luminanceSource.RotateSupported ||
!AutoRotate)
break;
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.rotateCounterClockwise()));
}
if (results != null)
{
foreach (var result in results)
{
if (result.ResultMetadata == null)
{
result.putMetadata(ResultMetadataType.ORIENTATION, rotationCount * 90);
}
else if (!result.ResultMetadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
result.ResultMetadata[ResultMetadataType.ORIENTATION] = rotationCount * 90;
}
else
{
// perhaps the core decoder rotates the image already (can happen if TryHarder is specified)
result.ResultMetadata[ResultMetadataType.ORIENTATION] =
((int)(result.ResultMetadata[ResultMetadataType.ORIENTATION]) + rotationCount * 90) % 360;
}
}
OnResultsFound(results);
}
return results;
}
/// <summary>
/// Tries to decode a barcode within an image which is given by a luminance source.
/// That method gives a chance to prepare a luminance source completely before calling
/// the time consuming decoding method. On the other hand there is a chance to create
/// a luminance source which is independent from external resources (like Bitmap objects)
/// and the decoding call can be made in a background thread.
/// </summary>
/// <param name="luminanceSource">The luminance source.</param>
/// <returns></returns>
public virtual Result Decode(LuminanceSource luminanceSource)
{
var result = default(Result);
var binarizer = CreateBinarizer(luminanceSource);
var binaryBitmap = new BinaryBitmap(binarizer);
var multiformatReader = Reader as MultiFormatReader;
var rotationCount = 0;
var rotationMaxCount = 1;
if (AutoRotate)
{
Options.Hints[DecodeHintType.TRY_HARDER_WITHOUT_ROTATION] = true;
rotationMaxCount = 4;
}
else
{
if (Options.Hints.ContainsKey(DecodeHintType.TRY_HARDER_WITHOUT_ROTATION))
Options.Hints.Remove(DecodeHintType.TRY_HARDER_WITHOUT_ROTATION);
}
for (; rotationCount < rotationMaxCount; rotationCount++)
{
if (usePreviousState && multiformatReader != null)
{
result = multiformatReader.decodeWithState(binaryBitmap);
}
else
{
result = Reader.decode(binaryBitmap, Options.Hints);
usePreviousState = true;
}
if (result == null)
{
if (TryInverted && luminanceSource.InversionSupported)
{
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.invert()));
if (usePreviousState && multiformatReader != null)
{
result = multiformatReader.decodeWithState(binaryBitmap);
}
else
{
result = Reader.decode(binaryBitmap, Options.Hints);
usePreviousState = true;
}
}
}
if (result != null ||
!luminanceSource.RotateSupported ||
!AutoRotate)
break;
luminanceSource = luminanceSource.rotateCounterClockwise();
binarizer = CreateBinarizer(luminanceSource);
binaryBitmap = new BinaryBitmap(binarizer);
}
if (result != null)
{
if (result.ResultMetadata == null)
{
result.putMetadata(ResultMetadataType.ORIENTATION, rotationCount * 90);
}
else if (!result.ResultMetadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
result.ResultMetadata[ResultMetadataType.ORIENTATION] = rotationCount * 90;
}
else
{
// perhaps the core decoder rotates the image already (can happen if TryHarder is specified)
result.ResultMetadata[ResultMetadataType.ORIENTATION] = ((int)(result.ResultMetadata[ResultMetadataType.ORIENTATION]) + rotationCount * 90) % 360;
}
OnResultFound(result);
}
return result;
}
/// <summary>
/// Tries to decode a barcode within an image which is given by a luminance source.
/// That method gives a chance to prepare a luminance source completely before calling
/// the time consuming decoding method. On the other hand there is a chance to create
/// a luminance source which is independent from external resources (like Bitmap objects)
/// and the decoding call can be made in a background thread.
/// </summary>
/// <param name="luminanceSource">The luminance source.</param>
/// <returns></returns>
private Result Decode(LuminanceSource luminanceSource)
{
var result = default(Result);
var binarizer = CreateBinarizer(luminanceSource);
var binaryBitmap = new BinaryBitmap(binarizer);
var multiformatReader = Reader as MultiFormatReader;
var rotationCount = 0;
var rotationMaxCount = 1;
if (AutoRotate)
{
Options.Hints[DecodeHintType.TRY_HARDER_WITHOUT_ROTATION] = true;
rotationMaxCount = 4;
}
else
{
if (Options.Hints.ContainsKey(DecodeHintType.TRY_HARDER_WITHOUT_ROTATION))
Options.Hints.Remove(DecodeHintType.TRY_HARDER_WITHOUT_ROTATION);
}
for (; rotationCount < rotationMaxCount; rotationCount++)
{
if (usePreviousState && multiformatReader != null)
{
result = multiformatReader.decodeWithState(binaryBitmap);
}
else
{
result = Reader.decode(binaryBitmap, Options.Hints);
usePreviousState = true;
}
if (result == null)
{
if (TryInverted && luminanceSource.InversionSupported)
{
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.invert()));
if (usePreviousState && multiformatReader != null)
{
result = multiformatReader.decodeWithState(binaryBitmap);
}
else
{
result = Reader.decode(binaryBitmap, Options.Hints);
usePreviousState = true;
}
}
}
if (result != null ||
!luminanceSource.RotateSupported ||
!AutoRotate)
break;
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.rotateCounterClockwise()));
}
if (result != null)
{
if (result.ResultMetadata == null)
{
result.putMetadata(ResultMetadataType.ORIENTATION, rotationCount * 90);
}
else if (!result.ResultMetadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
result.ResultMetadata[ResultMetadataType.ORIENTATION] = rotationCount * 90;
}
else
{
// perhaps the core decoder rotates the image already (can happen if TryHarder is specified)
result.ResultMetadata[ResultMetadataType.ORIENTATION] = ((int)(result.ResultMetadata[ResultMetadataType.ORIENTATION]) + rotationCount * 90) % 360;
}
OnResultFound(result);
}
return result;
}
/// <summary>
/// Tries to decode barcodes within an image which is given by a luminance source.
/// That method gives a chance to prepare a luminance source completely before calling
/// the time consuming decoding method. On the other hand there is a chance to create
/// a luminance source which is independent from external resources (like Bitmap objects)
/// and the decoding call can be made in a background thread.
/// </summary>
/// <param name="luminanceSource">The luminance source.</param>
/// <returns></returns>
private Result[] DecodeMultiple(LuminanceSource luminanceSource)
{
var results = default(Result[]);
var binarizer = CreateBinarizer(luminanceSource);
var binaryBitmap = new BinaryBitmap(binarizer);
var rotationCount = 0;
var rotationMaxCount = 1;
MultipleBarcodeReader multiReader = null;
if (AutoRotate)
{
Options.Hints[DecodeHintType.TRY_HARDER_WITHOUT_ROTATION] = true;
rotationMaxCount = 4;
}
var formats = Options.PossibleFormats;
if (formats != null &&
formats.Length == 1 &&
formats[0] == BarcodeFormat.QR_CODE)
{
multiReader = new QRCodeMultiReader();
}
else
{
multiReader = new GenericMultipleBarcodeReader(Reader);
}
for (; rotationCount < rotationMaxCount; rotationCount++)
{
results = multiReader.decodeMultiple(binaryBitmap, Options.Hints);
if (results == null)
{
if (TryInverted && luminanceSource.InversionSupported)
{
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.invert()));
results = multiReader.decodeMultiple(binaryBitmap, Options.Hints);
}
}
if (results != null ||
!luminanceSource.RotateSupported ||
!AutoRotate)
break;
binaryBitmap = new BinaryBitmap(CreateBinarizer(luminanceSource.rotateCounterClockwise()));
}
if (results != null)
{
foreach (var result in results)
{
if (result.ResultMetadata == null)
{
result.putMetadata(ResultMetadataType.ORIENTATION, rotationCount * 90);
}
else if (!result.ResultMetadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
result.ResultMetadata[ResultMetadataType.ORIENTATION] = rotationCount * 90;
}
else
{
// perhaps the core decoder rotates the image already (can happen if TryHarder is specified)
result.ResultMetadata[ResultMetadataType.ORIENTATION] =
((int)(result.ResultMetadata[ResultMetadataType.ORIENTATION]) + rotationCount * 90) % 360;
}
}
OnResultsFound(results);
}
return results;
}
