public static Bitmap Filter(byte[,] input, Kernel kernel, bool monochrome = false)
{
int width = input.GetLength(0);
int height = input.GetLength(1);
int kWidth = kernel.Width;
int kHeight = kernel.Height;
int kWidthHalf = kWidth / 2;
int kHeightHalf = kHeight / 2;
byte[,] inputBytes = AddOutline(input, kWidthHalf, kHeightHalf);
byte[,] outputBytes = new byte[width, height];
double sumPixel, sumKernel;
double kernelValue;
int x, y, i, j;
for (x = 0; x < width; x++)
{
for (y = 0; y < height; y++)
{
sumPixel = sumKernel = 0;
for (i = 0; i < kWidth; i++)
{
for (j = 0; j < kHeight; j++)
{
kernelValue = kernel[i, j];
if (kernelValue != 0)
{
sumPixel += inputBytes[x + i, y + j] * kernelValue;
sumKernel += kernelValue;
}
}
}
if (sumKernel <= 0)
{
sumKernel = 1;
}
sumPixel /= sumKernel;
if (sumPixel < 0)
{
sumPixel = 0;
}
else if (sumPixel > 255)
{
sumPixel = 255;
}
outputBytes[x, y] = (byte)sumPixel;
}
}
if (monochrome)
{
return(BitmapBytesConverter.Get1BppBitmap(outputBytes));
}
return(BitmapBytesConverter.GetGrayscale8BppBitmap(outputBytes));
}
public static Bitmap GetBorderMask(Point[] points, int width, int height)
{
byte[,] outputBytes = new byte[width, height];
int length = points.Length;
for (int line = 0; line < length; line++)
{
outputBytes[points[line].X, points[line].Y] = 255;
}
return(BitmapBytesConverter.GetGrayscale8BppBitmap(outputBytes));
}
