functions

    public int[,] GetIntArray(string file)
        {
            uint heigth = 2048;
            uint width = 2048;
            var result = new int[heigth, width];

            using (BinaryReader reader = new BinaryReader(File.Open(file, FileMode.Open)))
            {
                for (int i = 0; i < heigth; i++)
                {
                    for (int j = 0; j < width; j++)
                    {
                        result[j, i] = reader.ReadUInt16();
                    }
                }
            }
            return result;
        }

        public int[,] GetIntArray2(string file)
        {
            uint heigth = 2048;
            uint width = 2048;
            var result = new int[heigth, width];

            using (BinaryReader reader = new BinaryReader(File.Open(file, FileMode.Open)))
            {
                for (int i = 0; i < heigth; i++)
                {
                    for (int j = -1; j < width-1;)
                    {
                        UInt64 r = reader.ReadUInt64();
                        result[++j, i] = (UInt16)(r >> 48);
                        result[++j, i] = (UInt16)(r >> 32);
                        result[++j, i] = (UInt16)(r >> 16);
                        result[++j, i] = (UInt16)(r);
                    }
                }
            }
            return result;
        }