#include 
#include <math.h>
#include "array.h"
#define feature_point 0
#define background 255    ---define as HoughLineDetector.h---
class HoughLineDetector
{
 float sin_tab[180],cos_tab[180];
 public:
        HoughLineDetector()// Generate sin and cos look-up table
        {
         float theta;
         for(int angle=0;angle<180;angle  )
         {
          theta=angle*3.14159265358979/180.0;
          cos_tab[angle]=cos(theta);
          sin_tab[angle]=sin(theta);
         }    
        }
        void Transform(uc2D &im,uc2D &hough);
};    ---define as HoughLineDetector.cpp---
#include "HoughLineDetector.h"
 
void  HoughLineDetector::Transform(uc2D &im, uc2D &hough_ima)
{
 float rmax=sqrt((float)im.nr*(float)im.nr 
 (float)im.nc*(float)im.nc);
 hough_ima.Initialize(2*rmax,180);
 for(int j=0;j