本文实例讲述了asp.net(c#)编程实现将彩色图片变灰阶图片的方法。分享给大家供大家参考，具体如下：
代码如下：
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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Drawing;
using System.Drawing.Imaging;
namespace WebApplication2
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Bitmap b = new Bitmap(Server.MapPath("01.jpg"));
for (int x = 0; x < b.Width; x++)
{
for (int y = 0; y < b.Height; y++)
{
Color pixel = b.GetPixel(x, y);
int val = (pixel.R + pixel.G + pixel.B) / 3;
b.SetPixel(x, y, Color.FromArgb(val, val, val));
}
}
b.Save(Server.MapPath("1.jpg"));
}
}
}
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希望本文所述对大家C#程序设计有所帮助。