/// <summary>
/// Color Filter
/// </summary>
/// <param name="sourceBitmap">Set source Bitmap</param>
/// <param name="matrixSize">Set matrix size</param>
/// <param name="edgeThreshold">Set edge threshold</param>
/// <param name="applyBlue">Apply Blue</param>
/// <param name="applyGreen">Apply Green</param>
/// <param name="applyRed">Apply Red</param>
/// <param name="edgeType">Set edge type</param>
/// <param name="shiftType">Set shift type</param>
/// <returns></returns>
public static System.Drawing.Bitmap AbstractColorsFilter(this System.Drawing.Bitmap sourceBitmap,
int matrixSize,
byte edgeThreshold,
bool applyBlue = true,
bool applyGreen = true,
bool applyRed = true,
EdgeTracingType edgeType =
EdgeTracingType.Black,
ColorShiftType shiftType =
ColorShiftType.None)
{
System.Drawing.Bitmap edgeBitmap =
sourceBitmap.GradientBasedEdgeDetectionFilter(edgeThreshold);
System.Drawing.Bitmap colorBitmap =
sourceBitmap.AverageColoursFilter(matrixSize,
applyBlue, applyGreen, applyRed, shiftType);
byte[] edgeBuffer = edgeBitmap.GETByteArray();
byte[] colorBuffer = colorBitmap.GETByteArray();
byte[] resultBuffer = colorBitmap.GETByteArray();
for (int k = 0; k + 4 < edgeBuffer.Length; k += 4)
{
if (edgeBuffer[k] == 255)
{
switch (edgeType)
{
case EdgeTracingType.Black:
resultBuffer[k] = 0;
resultBuffer[k + 1] = 0;
resultBuffer[k + 2] = 0;
break;
case EdgeTracingType.White:
resultBuffer[k] = 255;
resultBuffer[k + 1] = 255;
resultBuffer[k + 2] = 255;
break;
case EdgeTracingType.HalfIntensity:
resultBuffer[k] = ClipByte(resultBuffer[k] * 0.5);
resultBuffer[k + 1] = ClipByte(resultBuffer[k + 1] * 0.5);
resultBuffer[k + 2] = ClipByte(resultBuffer[k + 2] * 0.5);
break;
case EdgeTracingType.DoubleIntensity:
resultBuffer[k] = ClipByte(resultBuffer[k] * 2);
resultBuffer[k + 1] = ClipByte(resultBuffer[k + 1] * 2);
resultBuffer[k + 2] = ClipByte(resultBuffer[k + 2] * 2);
break;
case EdgeTracingType.ColorInversion:
resultBuffer[k] = ClipByte(255 - resultBuffer[k]);
resultBuffer[k + 1] = ClipByte(255 - resultBuffer[k + 1]);
resultBuffer[k + 2] = ClipByte(255 - resultBuffer[k + 2]);
break;
}
}
}
System.Drawing.Bitmap resultBitmap = new System.Drawing.Bitmap(sourceBitmap.Width,
sourceBitmap.Height);
BitmapData resultData =
resultBitmap.LockBits(new Rectangle(0, 0,
resultBitmap.Width, resultBitmap.Height),
ImageLockMode.WriteOnly,
PixelFormat.Format32bppArgb);
Marshal.Copy(resultBuffer, 0, resultData.Scan0,
resultBuffer.Length);
resultBitmap.UnlockBits(resultData);
return(resultBitmap);
}
