主动窗口屏幕捕获并减小尺寸

Question

我正在尝试使用下面的该代码筛选捕获活动窗口。但是此代码正在捕获确切的屏幕尺寸和排水200MB的内存。实际上，我只需要320x180像素分辨率，并且内存使用量更少。有什么方法可以减小屏幕捕获时的尺寸？

        public Bitmap Capture(enmScreenCaptureMode screenCaptureMode = enmScreenCaptureMode.Window)
    {
        Rectangle bounds;

        if (screenCaptureMode == enmScreenCaptureMode.Screen)
        {
            bounds = Screen.GetBounds(System.Drawing.Point.Empty);
            CursorPosition = Cursor.Position;
        }
        else
        {
            var foregroundWindowsHandle = GetForegroundWindow();
            var rect = new Rect();
            GetWindowRect(foregroundWindowsHandle, ref rect);
            bounds = new Rectangle(rect.Left, rect.Top, rect.Right - rect.Left, rect.Bottom - rect.Top);
            CursorPosition = new System.Drawing.Point(Cursor.Position.X - rect.Left, Cursor.Position.Y - rect.Top);
        }
            var result = new Bitmap(bounds.Width, bounds.Height);

            using (var g = Graphics.FromImage(result))
            {
                g.CopyFromScreen(new System.Drawing.Point(bounds.Left, bounds.Top), System.Drawing.Point.Empty, bounds.Size);
            }


        return result;
    }