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Bitmap grayScaleBP = new System.Drawing.Bitmap(2, 2, System.Drawing.Imaging.PixelFormat.Format16bppGrayScale);

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Bitmap d;
int x, y;

// 循環(huán)遍歷圖像像素并將其顏色重置為灰度
for (x = 0; x < ...; x++) {
    for (y = 0; y < ...; y++) {
        // 灰度轉(zhuǎn)換邏輯...
    }
}

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public static Bitmap MakeGrayscale3(Bitmap original)
{
    Bitmap newBitmap = new Bitmap(original.Width, original.Height);

    using (Graphics g = Graphics.FromImage(newBitmap))
    {
        // 創(chuàng)建灰度ColorMatrix
        ColorMatrix colorMatrix = new ColorMatrix(
            new float[][]
            {
                new float[] {.3f, .3f, .3f, 0, 0},
                new float[] {.59f, .59f, .59f, 0, 0},
                new float[] {.11f, .11f, .11f, 0, 0},
                new float[] {0, 0, 0, 1, 0},
                new float[] {0, 0, 0, 0, 1}
            });

        // 使用灰度ColorMatrix繪制原始圖像
        g.DrawImage(original, new Rectangle(0, 0, original.Width, original.Height),
                    0, 0, original.Width, original.Height, GraphicsUnit.Pixel,
                    new ImageAttributes { ColorMatrix = colorMatrix });
    }

    return newBitmap;
}

? ??? ColorMatrix? ???? ?????? ??? ???? ??? ??????.

? ??? C#?? ???? ??????? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!