vid_prewitt_sfcn_wrapper.c

vid_edge.mdl 在视频序列的运动检测中使用Prewitt边缘检测算子检测

/*
 *
 *   --- THIS FILE GENERATED BY S-FUNCTION BUILDER: 2.0 ---
 *
 *   This file is a wrapper S-function produced by the S-Function
 *   Builder which only recognizes certain fields.  Changes made
 *   outside these fields will be lost the next time the block is
 *   used to load, edit, and resave this file. This file will be overwritten
 *   by the S-function Builder block. If you want to edit this file by hand, 
 *   you must change it only in the area defined as:  
 *
 *        %%%-SFUNWIZ_wrapper_XXXXX_Changes_BEGIN 
 *            Your Changes go here
 *        %%%-SFUNWIZ_wrapper_XXXXXX_Changes_END
 *
 *   For better compatibility with the Real-Time Workshop, the
 *   "wrapper" S-function technique is used.  This is discussed
 *   in the Real-Time Workshop User's Manual in the Chapter titled,
 *   "Wrapper S-functions".
 *
 *   Created: Fri Mar 14 14:40:15 2003
 */


/*
 * Include Files
 *
 */
#include "tmwtypes.h"
/* %%%-SFUNWIZ_wrapper_includes_Changes_BEGIN --- EDIT HERE TO _END */
#include <math.h>



















/* %%%-SFUNWIZ_wrapper_includes_Changes_END --- EDIT HERE TO _BEGIN */
#define u_width 120
#define y_width 160
/*
 * Create external references here.  
 *
 */
/* %%%-SFUNWIZ_wrapper_externs_Changes_BEGIN --- EDIT HERE TO _END */
/* extern double func(double a); */



















/* %%%-SFUNWIZ_wrapper_externs_Changes_END --- EDIT HERE TO _BEGIN */

/*
 * Output functions
 *
 */
void vid_prewitt_sfcn_Outputs_wrapper(const real32_T *bx,
                          const real32_T *by,
                          const real32_T *b,
                          uint8_T *e, 
                          const real_T  *cutoffp, const int_T  p_width0, 
                          const real_T  *dirp,  const int_T p_width1)
{
/* %%%-SFUNWIZ_wrapper_Outputs_Changes_BEGIN --- EDIT HERE TO _END */
/* Prewitt edge detection
          * Uses partial results computed as bx, by, and b
          * and performs edge detection comparison.
          *
          *  Dir: 1=both, 2=vert_only, 3=horiz_only
          */
         const int_T M = 120;  /* rows */
         const int_T N = 160;  /* cols */
         const float cutoff = (float)cutoffp[0];
         const int_T kx = (int_T)(dirp[0] != 3);
         const int_T ky = (int_T)(dirp[0] != 2);
         int_T c;
         for(c=1; c<N; c++) {
           int_T r;
           for(r=1; r<M; r++) {
             int_T rc = r+c*M;
             int_T rm1c = rc-1;
             int_T rp1c = rc+1;
             int_T rcm1 = rc-M;
             int_T rcp1 = rc+M;
             e[rc] = (b[rc] > cutoff) && (
                        (     (!kx || (bx[rc] >= (by[rc])))
                               && (b[rcm1] <= b[rc])
                               && (b[rc]   >  b[rcp1])
                        ) || (
                              (!ky || (by[rc] >= (bx[rc])))
                               && (b[rm1c] <= b[rc])
                               && (b[rc] > b[rp1c])
                        )
                 );
           }
         }
        
       
      
     
    
   
  
 

/* %%%-SFUNWIZ_wrapper_Outputs_Changes_END --- EDIT HERE TO _BEGIN */
}

/*
 * Updates function
 *
 */
void vid_prewitt_sfcn_Update_wrapper(const real32_T *bx,
                          const real32_T *by,
                          const real32_T *b,
                          const uint8_T *e, 
                          const real_T  *cutoffp,  const int_T  p_width0,
                           const real_T  *dirp, const int_T p_width1)
{
/* %%%-SFUNWIZ_wrapper_Update_Changes_BEGIN --- EDIT HERE TO _END */
/*
                     * Code example
                     *   xD[0] = u0[0];
                    */ 
                  
                 
                
               
              
             
            
           
          
         
        
       
      
     
    
   
  
 

/* %%%-SFUNWIZ_wrapper_Update_Changes_END --- EDIT HERE TO _BEGIN */
}

/*
 *  Derivatives function
 *
 */
void vid_prewitt_sfcn_Derivatives_wrapper(const real32_T *bx,
                          const real32_T *by,
                          const real32_T *b,
                          const uint8_T *e,
                          real_T *dx, 
                          const real_T  *cutoffp,  const int_T  p_width0,
                           const real_T  *dirp, const int_T p_width1)
{
/* %%%-SFUNWIZ_wrapper_Derivatives_Changes_BEGIN --- EDIT HERE TO _END */
/*
                     * Code example
                     *   dx[0] = xC[0];
                    */ 
                  
                 
                
               
              
             
            
           
          
         
        
       
      
     
    
   
  
 

/* %%%-SFUNWIZ_wrapper_Derivatives_Changes_END --- EDIT HERE TO _BEGIN */
}