/////////////////////////
// Convultion Filters //
///////////////////////
static public byte[] ApplyKernel(byte[] buffer, int stride, CustomKernel customKernel)
{
double[,] kernel = customKernel.GetKernel();
byte[] result = new byte[buffer.Length];
// 1D Bitmap byte data
for (int i = 0; i < buffer.Length; i++)
{
if ((i + 1) % 4 == 0)
{
result[i] = buffer[i];
continue;
}
double newByte = 0;
bool ignorePixel = false;
// Kernel Columns
int lowerColBound = -kernel.GetLength(0) / 2 - customKernel.anchor.X;
int upperColBound = kernel.GetLength(0) / 2 - customKernel.anchor.X;
for (int j = lowerColBound; j <= upperColBound; j++)
{
if ((i + 4 * j < 0) || (i + 4 * j >= buffer.Length) || ignorePixel)
{
newByte = 0;
break;
}
// Kernel Rows
int lowerRowBound = -kernel.GetLength(1) / 2 - customKernel.anchor.Y;
int upperRowBound = kernel.GetLength(1) / 2 - customKernel.anchor.Y;
for (int k = lowerRowBound; k <= upperRowBound; k++)
{
if ((i + 4 * j + k * stride < 0) || (i + 4 * j + k * stride >= buffer.Length))
{
ignorePixel = true;
break;
}
newByte += kernel[
j - lowerColBound,
k - lowerRowBound]
* buffer[i + 4 * j + k * stride]
+ customKernel.offset;
}
}
result[i] = (byte)(newByte < 0 ? 0 : newByte > 255 ? 255 : newByte);
}
return(result);
}
public void SetUpKernelEditor()
{
Console.WriteLine(kernel);
CustomKernel customKernel = Kernel.customKernels[kernel];
CBFilterType.DataSource = filterTypes;
NUDDivisor.Minimum = decimal.MinValue;
NUDDivisor.Maximum = decimal.MaxValue;
NUDDivisor.Value = customKernel.divisor;
NUDKernelColumn.Value = customKernel.kernel.GetLength(0);
NUDKernelRow.Value = customKernel.kernel.GetLength(1);
NUDOffset.Value = customKernel.offset;
NUDAnchorCol.Value = customKernel.anchor.X;
NUDAnchorRow.Value = customKernel.anchor.Y;
SetUpTableLayout(customKernel.kernel.GetLength(0), customKernel.kernel.GetLength(1), customKernel.kernel);
}
static public Bitmap ApplyFilter(this Bitmap bmp, Func <byte[], int, CustomKernel, byte[]> filter, CustomKernel customKernel)
{
byte[] buffer = bmp.GetBitmapDataBytes(out int stride);
byte[] result = filter(buffer, stride, customKernel);
Bitmap bmpRes = new Bitmap(bmp.Width, bmp.Height);
bmpRes.SetBitmapDataBytes(result);
return(bmpRes);
}
