有没有一种更有效的方法来计算和利用柏林噪声?

我几天前才开始使用柏林噪声，结果看起来相当不错。但是计算和绘制上述噪声的1024 × 1024位图需要3秒钟以上的时间。我使用一个1024x1024的数组来存储范围从-1到1的int32。

创建柏林噪声数组的代码:

 private void button1_Click(object sender, EventArgs e)
    {
        sw.Start();
        LibNoise.Perlin perlinMap = new LibNoise.Perlin();
        perlinMap.Lacunarity = lacunarity + 0.01d;
        perlinMap.NoiseQuality = LibNoise.NoiseQuality.High;
        perlinMap.OctaveCount = octaveCount;
        perlinMap.Persistence = persistence;
        perlinMap.Frequency = frequency;
        perlinMap.Seed = 1024;
        if (radioButton1.Checked)
            perlinMap.NoiseQuality = LibNoise.NoiseQuality.Low;
        else if (radioButton2.Checked)
            perlinMap.NoiseQuality = LibNoise.NoiseQuality.Standard;
        else if (radioButton3.Checked)
            perlinMap.NoiseQuality = LibNoise.NoiseQuality.High;
        double sample = trackBar6.Value * 10;
        double[,] perlinArray = new double[resolutieX, resolutieY];
        for (int x = 0; x < resolutieX; x++)
        {
            for (int y = 0; y < resolutieY; y++)
            {
                perlinArray[x, y] = perlinMap.GetValue(x / sample, y / sample, 1d);
            }
        }
        draw(perlinArray);
        textBox12.Text = sw.ElapsedMilliseconds.ToString() + "ms";
        sw.Reset();
    }

提取柏林噪声的代码:

 public void draw(double[,] array)
    {
        Bitmap afbeelding = new Bitmap(1024, 1024);
        Color color;
        int tileSize = 1024 / resolutieY;
        for (int y = 1; y < resolutieY; y++)
        {
            for (int x = 1; x < resolutieX; x++)
            {
                if (array[x, y] <= -0.2)
                    color = Color.DarkBlue;
                if (array[x, y] <= 0)
                    color = Color.DarkBlue;
                else if (array[x, y] <= 0.1)
                    color = Color.Blue;
                else if (array[x, y] <= 0.2)
                    color = Color.Beige;
                else if (array[x, y] <= 0.22)
                    color = Color.LightGreen;
                else if (array[x, y] <= 0.40)
                    color = Color.Green;
                else if (array[x, y] <= 0.75)
                    color = Color.DarkGreen;
                else if (array[x, y] <= 0.8)
                    color = Color.LightSlateGray;
                else if (array[x, y] <= 0.9)
                    color = Color.Gray;
                else if (array[x, y] <= 1)
                    color = Color.DarkSlateGray;
                else
                    color = Color.DarkSlateGray;
                //  color = Color.FromArgb(255);
                for (int i = 0; i < tileSize; i++)
                {
                    for (int j = 0; j < tileSize; j++)
                    {
                        afbeelding.SetPixel(((x - 1) * tileSize) + i, ((y - 1) * tileSize) + j, color);
                    }
                }
            }
        }
        pictureBox1.Image = afbeelding;
    }

我应该使用单纯形噪声吗?还是我遗漏了什么?