c#的图像处理(直方图；反差，密度的四边圆补偿示例)

c#的图像处理(直方图；反差，密度的四边圆补偿示例)(1)

模拟Photo的直方图，不过只是显示；
有对图像四角的密度和反差进行补偿，这是现在LDD（LCD+LED）数码裁放机上常用的补偿方法！
主要还是对GDI+的应用，大家不妨看看原码！

.net/soft/dreign.rar">http://www.nxxn.net/soft/dreign.rar
 //图像处理--------------------------------------------------------------------------------------

using System;
using System.Drawing;
using System.Drawing.Imaging;

namespace zft
{ 
 public class BitmapFilter
 {  
  public static bool modu1(Bitmap image,int r,int g,int b)
  { 
   if(r==0) r=1;
   if(g==0) g=1;
   if(b==0) b=1;
   BitmapData bmData =  image.LockBits(new Rectangle(0, 0,image.Width , image.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
   unsafe
   {
    int stride = bmData.Stride;
    System.IntPtr Scan0 = bmData.Scan0;   
    byte * p = (byte *)(void *)Scan0;
    int nOffset = stride - image.Width*3;    
    
    int nWidth=image.Width;
    int nHeight=image.Height;
    int red,green,blue;

    int w0=(int)(nWidth/2);
    int h0=(int)(nHeight/2);
    int r0,t1,t2,kr=r,kg=g,kb=b;
    double z,z0;

    int k1r=r,k1g=g,k1b=b,
     k2r=r,k2g=g,k2b=b,
     k3r=r,k3g=g,k3b=b,
     k4r=r,k4g=g,k4b=b;
    
    if(w0>h0)