检查颜色相似度算法太慢[重复](Checking color similarity algorithm is too slow [duplicate])

 
 
 这个问题在这里已有答案： 
 
 
 
  
 C＃ - 适用于Windows Forms App 4的 BitPps的SetPixel和GetPixel的更快替代品 
 
 
 
 
 我试图每50毫秒截取一次屏幕截图并删除所有与我在开始时决定的颜色不相似的颜色，但检查每个像素颜色的代码部分太慢，所以在结束它几乎每1.5秒做一次截图...这是代码： 
 
public int upX = 114;
public int upY = 28;
public Size size = new Size(1137,640);
public Color rosa = Color.FromArgb(255, 102, 153);
public int tollerance = 20;

private void button1_Click(object sender, EventArgs e){
  button1.Enabled = false;
  do{
    Bitmap bmpScreenshot = screenshot();
    deleteColors(bmpScreenshot, rosa);
    picturebox1.image = bmpScreenshot;
    Application.DoEvents();
  } while (true);
}

public Bitmap screenshot() {
  Bitmap bmpScreenshot = new Bitmap(size.Width, size.Height, PixelFormat.Format16bppRgb555);
  Graphics gfxScreenshot = Graphics.FromImage(bmpScreenshot);
  gfxScreenshot.CopyFromScreen(upX, upY, 0, 0, size);
  return bmpScreenshot;
}

public void deleteColors(Bitmap bitmap, Color colorToSave) {
  for (int i = 0; i < bitmap.Width; i++){
    for (int j = 0; j < bitmap.Height; j++){
      Color c = bitmap.GetPixel(i, j);
      if (!colorsAreSimilar(c, colorToSave, tollerance)){
        bitmap.SetPixel(i, j, Color.White);
      }
     }
   }
 }

public bool colorsAreSimilar(Color a, Color b, int tollerance) {
  if (Math.Abs(a.R - b.R) < tollerance && Math.Abs(a.G - b.G) < tollerance && Math.Abs(a.B - b.B) < tollerance) {
    return true;
  }
  return false;
}
 
 屏幕截图部分需要17到21毫秒，所以它已经太高了，但删除部分需要1300毫秒，所以我想先修复它，但是......我不知道我能做些什么来使代码更轻松。 

 
 
This question already has an answer here:
 
 
 
  
 C# - Faster Alternatives to SetPixel and GetPixel for Bitmaps for Windows Forms App  4 answers  
 
 
 
 
I'm trying to take a screenshot every 50 ms and remove all colors that are not similar to a color that I've decided in the beginning, but the part of code that check the color of every pixel is too slow, so in the end it do a screenshot almost every 1.5s... Here is the code:
 
public int upX = 114;
public int upY = 28;
public Size size = new Size(1137,640);
public Color rosa = Color.FromArgb(255, 102, 153);
public int tollerance = 20;

private void button1_Click(object sender, EventArgs e){
  button1.Enabled = false;
  do{
    Bitmap bmpScreenshot = screenshot();
    deleteColors(bmpScreenshot, rosa);
    picturebox1.image = bmpScreenshot;
    Application.DoEvents();
  } while (true);
}

public Bitmap screenshot() {
  Bitmap bmpScreenshot = new Bitmap(size.Width, size.Height, PixelFormat.Format16bppRgb555);
  Graphics gfxScreenshot = Graphics.FromImage(bmpScreenshot);
  gfxScreenshot.CopyFromScreen(upX, upY, 0, 0, size);
  return bmpScreenshot;
}

public void deleteColors(Bitmap bitmap, Color colorToSave) {
  for (int i = 0; i < bitmap.Width; i++){
    for (int j = 0; j < bitmap.Height; j++){
      Color c = bitmap.GetPixel(i, j);
      if (!colorsAreSimilar(c, colorToSave, tollerance)){
        bitmap.SetPixel(i, j, Color.White);
      }
     }
   }
 }

public bool colorsAreSimilar(Color a, Color b, int tollerance) {
  if (Math.Abs(a.R - b.R) < tollerance && Math.Abs(a.G - b.G) < tollerance && Math.Abs(a.B - b.B) < tollerance) {
    return true;
  }
  return false;
}
 
The screenshot part take 17 to 21ms, so it's already too high, but the delete part take 1300ms, so I'd like to fix that before, but... I don't know what i could do to make the code lighter.

原文：