【IT168 技术文档】
本文的是一个如何用asp.net(c#)来做影像处理程式的实例。
输入彩色图片..输出灰阶图片.这个其实很简单.就是将RGB三原色..相加除以3
把结果再填回去RGB的位置..就可以做到了...
例如：R=50,G=100,B=30, R+G+B=50+100+30=180/3 = 90
所以：R=90,G=90,B=90...以此类推..
imageprocess.aspx.cs
using ...System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
public partial class imageprocess : System.Web.UI.Page
...{
protected void Page_Load(object sender, EventArgs e)
...{
Bitmap b = new Bitmap(Server.MapPath("f6.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("Newf6.jpg"));
}
}
using ...System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
public partial class imageprocess : System.Web.UI.Page
...{
protected void Page_Load(object sender, EventArgs e)
...{
Bitmap b = new Bitmap(Server.MapPath("f6.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("Newf6.jpg"));
}
}
执行结果:
