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int red = colorvalue >> 2;// why use this expression
colorvalue -= red << 2;
int colorValue = messageLength;
int red = colorValue >> 2;
colorValue -= red << 2;
int green = colorValue >> 1;
int blue = colorValue - (green << 1);
pixelColor = Color.FromArgb(red, green, blue);
bitmap.SetPixel(0,0, pixelColor);
請解釋對我來說。我不明白這個算法。爲什麼使用這個表達式:colorvalue -= red << 2;
?返回值時,該代碼是執行