使用抗锯齿功能在.Net中调整图像大小

Question

我有一些C#代码调整了我认为非常典型的图像大小:

Bitmap bmp = new Bitmap(image, new Size(width, height));
Graphics graphics = Graphics.FromImage(bmp);
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.DrawImage(bmp, width, height);

问题是结果图像明显有别名,并且对InterpolationMode和SmoothingMode属性的更改似乎没有区别.

有什么指针吗？

Answer 1

它变成了代码错误.它实际上是在Bitmap构造函数中没有插值的情况下调整图像大小,然后尝试将该版本平滑地调整到它已经存在的大小.这是修改后的代码:

Bitmap bmp = new Bitmap(width, height);
Graphics graph = Graphics.FromImage(bmp);
graph.InterpolationMode = InterpolationMode.High;
graph.CompositingQuality = CompositingQuality.HighQuality;
graph.SmoothingMode = SmoothingMode.AntiAlias;
graph.DrawImage(image, new Rectangle(0, 0, width, height));

就抗锯齿而言,最重要的参数是graph.InterpolationMode.

谢谢.

Answer 2

尝试graphics.DrawImage(bmp, 0, 0, 宽度, 高度); 另请查看有关插值的 MSDN 文章。