public static PNM ApplyHeightMapFunction(this PNM image, int matrixLength, Func <int, int, float[], int, Pixel> func)
{
PNM newImage = PNM.Copy(image);
int padding = matrixLength / 2;
Pad(newImage, padding);
int newImageSize = newImage.Width * newImage.Height;
float[] heightmap = new float[newImageSize];
byte r, g, b;
for (int i = 0; i < newImageSize; i++)
{
newImage.GetPixel(i, out r, out g, out b);
heightmap[i] = PNM.RGBToLuminosity(r, g, b) / 255f;
}
newImage = ApplyHeightMapFunctionCore(newImage.Width, newImage.Height, heightmap, matrixLength, func);
Trim(newImage, padding);
return(newImage);
}
