private void AdditiveMultiplicativeFilter(Bitmap source, Bitmap destination, double[] matrix)
{
var initData = source.LockBits(new Rectangle(0, 0, source.Width, source.Height), ImageLockMode.ReadOnly, source.PixelFormat);
var destData = destination.LockBits(new Rectangle(0, 0, destination.Width, destination.Height), ImageLockMode.WriteOnly, source.PixelFormat);
int byteLength = 4;
if (source.PixelFormat.ToString().Contains("24"))
{
byteLength = 3;
}
var pixelCount = 3;
unsafe
{
byte *sourcePtr = (byte *)initData.Scan0.ToPointer();
byte *destPtr = (byte *)destData.Scan0.ToPointer();
int pixelOffset = pixelCount / 2;
int byteOffset = pixelOffset * byteLength;
for (int i = byteOffset; i < (initData.Stride - byteOffset); i += byteLength)
{
for (int j = pixelOffset; j < source.Height - pixelOffset; j++)
{
byte[][] window = PixelOperations.GetWindowOfPixels(sourcePtr, initData.Stride, i, j, byteLength, pixelCount);
byte[] pixel = GetAdditiveMultiplicatedPixel(Transform2Dto1DArray(window, byteLength * pixelCount * pixelCount), byteLength, matrix);
PixelOperations.SetPixelUnsafe(destPtr, pixel, initData.Stride, i, j, byteLength);
}
}
}
source.UnlockBits(initData);
destination.UnlockBits(destData);
}
