在C#中将RGB数组转换为图像 [英] Convert RGB array to image in C#

问题描述

我知道每个像素的rgb值，如何用C#中的这些值创建图片?我看过这样的例子:

I know the rgb value of every pixel, and how can I create the picture by these values in C#? I've seen some examples like this:

public Bitmap GetDataPicture(int w, int h, byte[] data)
  {

  Bitmap pic = new Bitmap(this.width, this.height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
  Color c;

  for (int i = 0; i < data.length; i++)
  {
    c = Color.FromArgb(data[i]);
    pic.SetPixel(i%w, i/w, c);
  }

  return pic;
  } 

但是它不起作用. 我有一个像这样的二维数组:

But it does not works. I have a two-dimensional array like this:

1 3 1 2 4 1 3 ...
2 3 4 2 4 1 3 ...
4 3 1 2 4 1 3 ...
...

每个数字对应一个rgb值，例如1 => {244,166,89} 2 => {54,68,125}.

Each number correspond to a rgb value, for example, 1 => {244,166,89} 2=>{54,68,125}.

推荐答案

我将尝试以下代码，该代码对调色板使用256个Color条目的数组(您必须预先创建并填充):

I'd try the following code, which uses an array of 256 Color entries for the palette (you have to create and fill this in advance):

public Bitmap GetDataPicture(int w, int h, byte[] data)
{
    Bitmap pic = new Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format32bppArgb);

    for (int x = 0; x < w; x++)
    {
        for (int y = 0; y < h; y++)
        {
            int arrayIndex = y * w + x;
            Color c = palette[arrayIndex];
            pic.SetPixel(x, y, c);
        }
    }

    return pic;
} 

我倾向于遍历像素，而不是数组，因为我发现读取双循环比单循环和取模/除法运算更容易.

I tend to iterate over the pixels, not the array, as I find it easier to read the double loop than the single loop and the modulo/division operation.

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