/// <summary>
/// Initializes a new instance of the <see cref="Binarizer"/> class.
/// </summary>
/// <param name="source">The source.</param>
protected internal Binarizer(LuminanceSource source)
{
if (source == null)
{
throw new ArgumentException("Source must be non-null.");
}
this.source = source;
}
/// <summary>
/// Initializes a new instance of the <see cref="Binarizer"/> class.
/// </summary>
/// <param name="source">The source.</param>
protected internal HybridBinarizer(LuminanceSource source)
{
if (source == null)
{
throw new ArgumentException("Source must be non-null.");
}
this.source = source;
}
/// <summary>
/// Returns a new object with rotated image data by 45 degrees counterclockwise.
/// Only callable if <see cref="RotateSupported"/> is true.
/// </summary>
/// <returns>A rotated version of this object.</returns>
public BinaryBitmap rotateCounterClockwise45()
{
LuminanceSource newSource = binarizer.LuminanceSource.rotateCounterClockwise45();
return(new BinaryBitmap(binarizer.createBinarizer(newSource)));
}
/// <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> Creates a new object with the same type as this Binarizer implementation, but with pristine /// state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache /// of 1 bit data. See Effective Java for why we can't use Java's clone() method. /// </summary> /// <param name="source">The LuminanceSource this Binarizer will operate on.</param> /// <returns> A new concrete Binarizer implementation object.</returns> public abstract Binarizer createBinarizer(LuminanceSource source);
/// <summary> Creates a new object with the same type as this Binarizer implementation, but with pristine /// state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache /// of 1 bit data. See Effective Java for why we can't use Java's clone() method. /// </summary> /// <param name="source">The LuminanceSource this Binarizer will operate on.</param> /// <returns> A new concrete Binarizer implementation object.</returns> public abstract Binarizer createBinarizer(LuminanceSource source);
/// <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;
}
/**
* Writes out a single PNG which is three times the width of the input image, containing from left
* to right: the original image, the row sampling monochrome version, and the 2D sampling
* monochrome version.
*/
private static void dumpBlackPoint(Uri uri, Bitmap image, BinaryBitmap bitmap, LuminanceSource luminanceSource)
{
// TODO: Update to compare different Binarizer implementations.
String inputName = uri.LocalPath;
if (inputName.Contains(".mono.png"))
{
return;
}
// Use the current working directory for URLs
String resultName = inputName;
int pos;
if ("http".Equals(uri.Scheme))
{
pos = resultName.LastIndexOf('/');
if (pos > 0)
{
resultName = '.' + resultName.Substring(pos);
}
}
pos = resultName.LastIndexOf('.');
if (pos > 0)
{
resultName = resultName.Substring(0, pos);
}
resultName += ".mono.png";
int width = bitmap.Width;
int height = bitmap.Height;
int stride = width * 4;
var result = new Bitmap(stride, height, PixelFormat.Format32bppArgb);
var offset = 0;
// The original image
for (int indexH = 0; indexH < height; indexH++)
{
for (int indexW = 0; indexW < width; indexW++)
{
result.SetPixel(indexW, indexH, image.GetPixel(indexW, indexH));
}
}
// Row sampling
BitArray row = new BitArray(width);
offset += width;
for (int y = 0; y < height; y++)
{
row = bitmap.getBlackRow(y, row);
if (row == null)
{
// If fetching the row failed, draw a red line and keep going.
for (int x = 0; x < width; x++)
{
result.SetPixel(offset + x, y, Color.Red);
}
continue;
}
for (int x = 0; x < width; x++)
{
result.SetPixel(offset + x, y, row[x] ? Color.Black : Color.White);
}
}
// 2D sampling
offset += width;
BitMatrix matrix = bitmap.BlackMatrix;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
result.SetPixel(offset + x, y, matrix[x, y] ? Color.Black : Color.White);
}
}
offset += width;
var luminanceMatrix = luminanceSource.Matrix;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
result.SetPixel(offset + x, y, Color.FromArgb(luminanceMatrix[y * width + x], luminanceMatrix[y * width + x], luminanceMatrix[y * width + x]));
}
}
result.Save(resultName, ImageFormat.Png);
}
/// <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;
}
