拆分分裂的字符串

时间:2013-10-14 13:08:35

标签: c# string rgb

我想在C#中拆分分裂的字符串。 基本上,我想以数字的形式保存图像,这里是使用GetPixel将其保存到C#中的数字的代码

TextWriter textWriter = new StreamWriter(fileName);
for (int x = 0; x < bmp.Width; x++)
{
   for (int y = 0; y < bmp.Height; y++)
   {
     Color pixel = bmp.GetPixel(x, y);
     textWriter.Write(pixel.R + "," + pixel.G + "," + pixel.B + " ");
   }
}

这是一个可能的结果:252,255,192 252,255,192 252,255,192。 像素由空格分隔,rgb用逗号分隔。

问题是当我试图将其再次转换为图像时,这是我当前获取像素的rgb的代码。

TextReader textReader = new StreamReader(fileName);
string allLine = textReader.ReadLine();
string[] splitPixel = allLine.Split(' ');
string[] splitRGB = null;

for (int i=0; i<splitPixel.Length; i++) {
  splitRGB[i] = splitPixel[i].Split(',');
}

这是设置像素颜色的代码

 for (int x = 0; x < bmp.Width; x++)
 {
    for (int y = 0; y < bmp.Height; y++)
    {
       byte tempR, tempG, tempB = 0;
       tempR = Convert.ToByte(splitRGB[x]);
       tempG = Convert.ToByte(splitRGB[x+1]);
       tempB = Convert.ToByte(splitRGB[x+2]);
       Color pixel = Color.FromArgb(tempR,tempG,tempB);
       bmp.SetPixel(x, y, pixel);
    }
 }

现在它只告诉我这个错误“无法将类型'string []'隐式转换为'string'”     splitRGB[i] = splitPixel[i].Split(',')

3 个答案:

答案 0 :(得分:1)

string[] splitPixel = allLine.Split(' ');
string[] splitRGB = new string[splitPixel.Length * 3];

for (int i=0; i<splitRGB.Length; i+=3) {
  string[] splitted = splitPixel[i].Split(',');
  splitRGB[i] = splitted[0];
  splitRGB[i + 1] = splitted[1];
  splitRGB[i + 2] = splitted[2];
}

编辑:这是一个更好的版本:

您应该将图像的宽度和高度保存在文件中(即:2x2图像与4 * 1图像具有相同的文件格式),在此我建议您将它们保存在第一行width height

using (TextReader textReader = new StreamReader(fileName)){
    string sizeLine = textReader.ReadLine();
    if (sizeLine == null) 
        throw new /*UnexpectedData*/Exception("invalid file!");
    string[] widthHeightStr = sizeLine.Split(' ');
    if (widthHeightStr.Length != 2) 
        throw new /*UnexpectedData*/Exception("invalid file!");
    int width = int.Parse(widthHeightStr[0]);
    int height = int.Parse(widthHeightStr[1]);
    string pixelsLine = textReader.ReadLine();
    if (onlyLine == null) 
        throw new /*UnexpectedData*/Exception("invalid file!");
    string[] splitPixel = pixelsLine.Split(' ');
    var bmp = new Bitmap(width, height);
    for (int i=0; i<splitPixel.Length; i++) {
        string[] splitted = splitPixel[i].Split(',');
        if (splitted.Length != 3) 
            throw new /*UnexpectedData*/Exception("invalid file!");
        int tempR = int.Parse(splitted[0]);
        int tempG = int.Parse(splitted[1]);
        int tempB = int.Parse(splitted[2]);
        Color pixel = Color.FromArgb(tempR,tempG,tempB);
        bmp.SetPixel(i / width, i % width, pixel);
    }   
}

编辑:

using (TextWriter textWriter = new StreamWriter(fileName){
    textWriter.WriteLine(bmp.Width + " " + bmp.Height);
    for (int x = 0; x < bmp.Width; x++)
    {
        for (int y = 0; y < bmp.Height; y++)
        {
            Color pixel = bmp.GetPixel(x, y);
            textWriter.Write(pixel.R + "," + pixel.G + "," + pixel.B + " ");
        }
    }
}

答案 1 :(得分:1)

错误只是解释你试图将一个数组(因为split返回一个数组)放在一个字符串中,因为splitRGB [i]是一个字符串,其中splitRGB[] = splitPixel[i].Split(',');splitRGB[i][] = splitPixel[i].Split(',');&lt; - 其中splitRGB[][] = new splitRGB[10][3]可以运作

所以你的代码:

for (int i=0; i<splitPixel.Length; i++) 
{
   splitRGB[i] = splitPixel[i].Split(',');
}

如果你想把一个数组放在一个数组中,你需要多维数组,如下所示:

string[][] splitRGB = new string[splitPixel.Length][3];

和for循环来获取你的RGB值     for(int i = 0; i

for (int x = 0; x < bmp.Width; x++)
 {
    for (int y = 0; y < bmp.Height; y++)
    {
       byte tempR, tempG, tempB = 0;
       tempR = Convert.ToByte(splitRGB[x][0]);
       tempG = Convert.ToByte(splitRGB[x][1]);
       tempB = Convert.ToByte(splitRGB[x][2]);
       Color pixel = Color.FromArgb(tempR,tempG,tempB);
       bmp.SetPixel(x, y, pixel);
    }
 }

变化非常微妙,我感觉自己犯了一个错误(我从不使用多维数组,我尽可能多地创建结构或类的数组)

答案 2 :(得分:0)

由于我不知道你对位图做了什么,我给你提供了另一种方法来获取位图数据到文件并一次性返回(你可以拆分它以满足你的需要)。 我替换了setPixel和GetPixel,因为它们访问数据的速度太慢,这将提供更快的结果:

//assume you have a class member variable of type bitmap called sourceBitmap.

BitmapData sourceData = sourceBitmap.LockBits(new Rectangle(0, 0,
                                    sourceBitmap.Width, sourceBitmap.Height),
                                    ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);

byte[] pixelBuffer = new byte[sourceData.Stride * sourceData.Height];

Marshal.Copy(sourceData.Scan0, pixelBuffer, 0, pixelBuffer.Length);

sourceBitmap.UnlockBits(sourceData);

File.WriteAllBytes(@"C:\..\..\test.txt", pixelBuffer);

//here is where you can split the code...

byte[] fs = File.ReadAllBytes(@"C:\..\..\test.txt");

Bitmap resultBitmap = new Bitmap(sourceBitmap.Width, sourceBitmap.Height);

BitmapData resultData = resultBitmap.LockBits(new Rectangle(0, 0,
                                    resultBitmap.Width, resultBitmap.Height),
                                    ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);

Marshal.Copy(fs, 0, resultData.Scan0, fs.Length);
            resultBitmap.UnlockBits(resultData);

pictureBox1.Image = resultBitmap;
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