gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg

public static double CalculateGradientBrightness(double[,] original, double[,] sobelFilter, int x, int y)
		{
			var offset =  sobelFilter.GetLength(0)/2;
			var result = 0.0;
			var filterSize = sobelFilter.GetLength(0);
			for (var i = 0; i < filterSize; i++)
			{
				for (var j = 0; j < filterSize; j++)
				{
					result += sobelFilter[i, j] * original[x - offset + i, y - offset + j];
				}
			}
			return result;
		}