在更大的位图中查找位图(Pixel bot) -如何使它/for循环更快

本文关键字：位图 何使它 for 循环 Pixel 查找 bot | 更新日期: 2023-09-27 18:19:16

所以这个函数在更大的位图中找到一个位图。buuuut . .通过1920x1080的屏幕需要4-6秒。我不会问你我是否100%理解这些代码，我没有，我是一个编程新手，我的逻辑已经有点睡着了(凌晨4点)。(代码来自视频教程，我使用了很长时间，甚至没有研究它:D)

所以我真正想要的是让机器人在游戏中找到像素/图片，然后点击它，但4-6秒很长，不是吗?我对此非常好奇，因为用其他编程语言制作的一些游戏的像素机器人非常非常快!像1 s…所以我想，这是由c#引起的吗?这可能不是c#造成的…但这段代码是正常工作的，但也许它不需要那么长?我想到了"更快的循环"…但这可能不会发生。

尝试发明一些解决方案，我会很感激的!我仍然认为这个问题可能对其他许多人来说很重要。

private bool FindBitmap(Bitmap bmpNeedle, Bitmap bmpHaystack, out Point location)
{
    for (int outerX = 0; outerX < bmpHaystack.Width - bmpNeedle.Width; outerX++)
    {
        for (int outerY = 0; outerY < bmpHaystack.Height - bmpNeedle.Height; outerY++)
        {
            for (int innerX = 0; innerX < bmpNeedle.Width; innerX++)
            {
                for (int innerY = 0; innerY < bmpNeedle.Height; innerY++)
                {
                    Color cNeedle = bmpNeedle.GetPixel(innerX, innerY);
                    Color cHaystack = bmpHaystack.GetPixel(innerX + outerX, innerY + outerY);
                    if (cNeedle.R != cHaystack.R || cNeedle.G != cHaystack.G || cNeedle.B != cHaystack.B)
                    {
                        goto notFound;
                    }
                }
            }
            location = new Point(outerX, outerY);
            return true;
        notFound:
            continue;
        }
    }
    location = Point.Empty;
    return false;
}

在更大的位图中查找位图(Pixel bot) -如何使它/for循环更快

我用LockBits和不安全的代码为它写了一个小类。表演很棒。我决定使用单位值而不是颜色。要转换，可以使用http://www.vcskicks.com/color-uint.php

/// <summary>
///     Represents a bitmap with bit functions.
/// </summary>
public class LockedBitmap
{
private Rectangle _bounds;
/// <summary>
///     Gets or sets the bitmap.
/// </summary>
public Bitmap Bitmap { get; set; }
/// <summary>
///     Gets or sets the values of the bitmap.
/// </summary>
/// <remarks>Watch at the static length!</remarks>
public uint[] Buffer { get; set; }
/// <summary>
///     Gets or sets the bitmap data.
/// </summary>
public BitmapData BitmapData { get; set; }
/// <summary>
///     Initializes a new instance of <see cref="LockedBitmap" />.
/// </summary>
/// <param name="bitmap">The processed bitmap.</param>
public LockedBitmap(Bitmap bitmap)
{
    this.Bitmap = bitmap;
}
/// <summary>
///     Locks a Bitmap into system memory.
/// </summary>
public unsafe void LockBits()
{
    var width = this.Bitmap.Width;
    var height = this.Bitmap.Height;
    var imageLockMode = ImageLockMode.UserInputBuffer;
    // Setting imageLockMode
    imageLockMode = imageLockMode | ImageLockMode.ReadOnly;
    imageLockMode = imageLockMode | ImageLockMode.WriteOnly;
    // Save the bouunds
    this._bounds = new Rectangle(0, 0, width, height);
    // Create Pointer
    var someBuffer = new uint[width*height];
    // Pin someBuffer
    fixed (uint* buffer = someBuffer) //pin
    {
        // Create new bitmap data.
        var temporaryData = new BitmapData
        {
            Width = width,
            Height = height,
            PixelFormat = PixelFormat.Format32bppArgb,
            Stride = width*4,
            Scan0 = (IntPtr) buffer
        };
        // Get the data
        this.BitmapData = this.Bitmap.LockBits(this._bounds, imageLockMode, PixelFormat.Format32bppArgb,
            temporaryData);
        // Set values
        this.Buffer = someBuffer;
    }
}
/// <summary>
///     Unlocks this Bitmap from system memory.
/// </summary>
public void UnlockBits()
{
    this.Bitmap.UnlockBits(this.BitmapData);
}
/// <summary>
///     Iterate through all pixel values.
/// </summary>
public unsafe void Iterate()
{
    // Dimension
    var width = this.Bitmap.Width;
    var height = this.Bitmap.Height;
    // Actual uint position
    int cp = 0;
    // Pointer at the fist uint
    var scp = (uint*)this.BitmapData.Scan0;
    // Stick the array
    fixed (uint* cb = this.Buffer)
        // Step through each pixel
        for (uint* cbp = cb, cbdest = cb + this.Buffer.Length; cbp < cbdest; cbp++)
        {
            // Get x and y from position
            var x = cp % width;
            var y = cp / width;
            var color = *cbp;
            cp++;  // Increment cp
        }
}
}

使用例子:

using (OpenFileDialog ofd = new OpenFileDialog())
{
    if (ofd.ShowDialog() == DialogResult.OK)
    {
        Image image = Image.FromFile(ofd.FileName);
        LockedBitmap locked = new LockedBitmap((Bitmap) image);
        locked.LockBits();
        locked.Iterate();
        locked.UnlockBits();
    }
}

color现在有像素的颜色值。cp为绝对位置(1D)(x|y)位图(2D)中的点位置

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