C#改变图片分辨率方法

C#改变图片分辨率方法

using System.Drawing;

using System.Drawing.Drawing2D;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

Bitmap bit =new Bitmap(@"E:\example\WebSite48\无标题.JPG");

bit = KiResizeImage(bit, 100, 100);

bit.Save(@"E:\example\WebSite48\无标题1.JPG");

bit.Dispose();

}

///

/// Resize图片

///

/// 原始Bitmap

/// 新的宽度

/// 新的高度

/// 保留着，暂时未用

/// 处理以后的图片

public static Bitmap KiResizeImage(Bitmap bmp, int newW, int newH) {

try

{

Bitmap b = new Bitmap(newW, newH);

Graphics g = Graphics.FromImage(b);

// 插值算法的质量

g.InterpolationMode = InterpolationMode.HighQualityBicubic;

g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);

g.Dispose();

return b;

}

catch

{

return null;

}

}

}