private void process()
{
stopwatch.Reset();
stopwatch.Start();
plates = new List <string>();
frame = contrastCorrectionFilter.Apply(originalImage);
frame = grayscaleFilter.Apply(frame);
BitmapData frameData = frame.LockBits(new Rectangle(0, 0, frame.Width, frame.Height), ImageLockMode.ReadWrite, frame.PixelFormat);
UnmanagedImage data = new UnmanagedImage(frameData);
bradleyLocalFilter.ApplyInPlace(data);
fillHoles.ApplyInPlace(data);
openingFilter.ApplyInPlace(data);
blobCounter.ProcessImage(data);
data.Dispose();
frame.UnlockBits(frameData);
Graphics g = Graphics.FromImage(originalImage);
Blob[] blobs = blobCounter.GetObjectsInformation();
foreach (Blob blob in blobs)
{
List <IntPoint> edgePoints = blobCounter.GetBlobsEdgePoints(blob);
List <IntPoint> corners = null;
// da li je četverougao?
if (!shapeChecker.IsQuadrilateral(edgePoints, out corners))
{
continue;
}
if (FindNewCornersAndCheckAspectRatio(corners))
{
SimpleQuadrilateralTransformation sqt = new SimpleQuadrilateralTransformation(corners, 300, 66);
Bitmap plate = sqt.Apply(originalImage);
plate = grayscaleFilter.Apply(plate);
otsuThresholdFilter.ApplyInPlace(plate);
if (!IsLicensePlate(plate))
{
continue;
}
String plateText;
if (FindText(plate, out plateText))
{
g.DrawPolygon(pen, ToPointsArray(corners));
frame = plate;
plates.Add(plateText);
}
}
}
g.Dispose();
stopwatch.Stop();
}
public static Bitmap PixelDiff(Bitmap a, Bitmap b)
{
var difference = new Difference(a);
var dif = difference.Apply(b);
gaussianBlur.ApplyInPlace(dif);
Bitmap clone = Grayscale.CommonAlgorithms.Y.Apply(dif);
threshold.ApplyInPlace(clone);
fillHoles.ApplyInPlace(clone);
return(clone);
}
public static Bitmap ProcessImage(string imagePath)
{
var img = AForge.Imaging.Image.FromFile(imagePath);
ContrastStretch filterContrastStretch = new ContrastStretch();
filterContrastStretch.ApplyInPlace(img);
try
{
img = Grayscale.CommonAlgorithms.BT709.Apply(img);
}
catch
{
System.Windows.Forms.MessageBox.Show("The image should not be grayscale");
}
Opening filterOpening = new Opening();
filterOpening.ApplyInPlace(img);
SobelEdgeDetector sobel = new SobelEdgeDetector();
sobel.ApplyInPlace(img);
Closing filterClosing = new Closing();
filterClosing.ApplyInPlace(img);
Threshold threshold = new Threshold(100);
threshold.ApplyInPlace(img);
FillHoles fillHoles = new FillHoles();
fillHoles.MaxHoleWidth = img.Width;
fillHoles.MaxHoleHeight = img.Height;
fillHoles.CoupledSizeFiltering = false;
fillHoles.ApplyInPlace(img);
filterOpening.ApplyInPlace(img);
Erosion filterErosion = new Erosion();
filterErosion.ApplyInPlace(img);
return(img);
}
public Binarize(UISettings ui, FileData file) : base(ui, file)
{
try {
Invert AFinvert = new Invert();
switch (ui.ThresholdIndex) // threshold method selection "Global mean" / "Local adaptive"
{
case 0: // Global
if (ui.ThreshGlobalIsAbsolute) // use absolute
{
Threshold AFglobalbinary = new Threshold(ui.ThreshGlobalAbsolute);
UnmanagedBlackWhite = AFglobalbinary.Apply(UnmanagedGray);
}
else // use relative
{
ImageStatistics stats = new ImageStatistics(UnmanagedGray, AFinvert.Apply(UnmanagedExclude));
Threshold AFglobalbinary = new Threshold(stats.Gray.Center2QuantileValue(1.0d * ui.ThreshGlobalRelative / 255.0d));
UnmanagedBlackWhite = AFglobalbinary.Apply(UnmanagedGray);
}
break;
case 1: // Local
BradleyLocalThresholdingX AFlocalbinary = new BradleyLocalThresholdingX()
{
PixelBrightnessDifferenceLimit = ui.ThreshLocalBrightnessDifference,
WindowSize = ui.ThreshLocalWindowSize, UpperLimit = 250
};
UnmanagedBlackWhite = AFlocalbinary.Apply(UnmanagedGray);
break;
}
if (ui.FillHoleAirspaceSwitch && ui.FillHoleAirspace != 0) // fill holes of airspaces
{
FillHoles AFfillinair = new FillHoles()
{
CoupledSizeFiltering = true, MaxHoleHeight = ui.FillHoleAirspace, MaxHoleWidth = ui.FillHoleAirspace
};
//FillHolesArea AFfillinair=new FillHolesArea() { MaxHoleArea=ui.FillHoleAirspace };
AFfillinair.ApplyInPlace(UnmanagedBlackWhite);
}
UnmanagedBlackWhite = AFinvert.Apply(UnmanagedBlackWhite);
if (ui.FillHoleTissueSwitch && ui.FillHoleTissue != 0) // fill holes of tissue
{
FillHoles AFfillintissue = new FillHoles()
{
CoupledSizeFiltering = true, MaxHoleHeight = ui.FillHoleTissue, MaxHoleWidth = ui.FillHoleTissue
};
//FillHolesArea AFfillintissue=new FillHolesArea() { MaxHoleArea=ui.FillHoleTissue };
AFfillintissue.ApplyInPlace(UnmanagedBlackWhite);
}
if (ui.MorphoDilateSwitch && ui.MorphoDilate != 0) // Morphological Dilate
{
int n = (Math.Max(ui.MorphoDilate, 0) * 2 + 1); short[,] morphmatrix = new short[n, n];
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
morphmatrix[i, j] = 1;
}
}
Dilatation AFdilate = new Dilatation(morphmatrix);
AFdilate.ApplyInPlace(UnmanagedBlackWhite);
}
if (ui.MorphoErodeSwitch && ui.MorphoErode != 0) // Morphological Erode
{
int n = (Math.Max(ui.MorphoErode, 0) * 2 + 1); short[,] morphmatrix = new short[n, n];
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
morphmatrix[i, j] = 1;
}
}
Erosion AFerode = new Erosion(morphmatrix);
AFerode.ApplyInPlace(UnmanagedBlackWhite);
}
if (ui.ExcludeColorSwitch)
{
NonParen_SumArea = ui.um2px2 * UnmanagedExclude.NonBlackArea();
}
if (ui.BlobMinSwitch)
{
Low_Threshold = Math.Pow(10.0d, ui.BlobMin) - 1;
}
else
{
Low_Threshold = 0.0d;
}
if (ui.BlobMaxSwitch)
{
High_Threshold = Math.Pow(10.0d, ui.BlobMax) - 1;
}
else
{
High_Threshold = int.MaxValue;
}
if (ui.BlobMinSwitch || ui.BlobMaxSwitch)
{
Merge AFmerge1 = new Merge(UnmanagedExclude);
ExcludeSize AFexcsize = new ExcludeSize()
{
Low = (int)Math.Round(Low_Threshold / ui.um2px2), High = (int)Math.Round(Math.Min(int.MaxValue, High_Threshold / ui.um2px2))
};
Merge AFmerge2 = new Merge(AFexcsize.Apply(AFinvert.Apply(AFmerge1.Apply(UnmanagedBlackWhite))));
AFmerge2.ApplyInPlace(UnmanagedExclude);
Low_SumArea = ui.um2px2 * AFexcsize.LowCount;
High_SumArea = ui.um2px2 * AFexcsize.HighCount;
}
} catch { throw new Exception("Error Occured During Binarization"); }
}
