c_meanfilter.c

基于VPM642开发板的中值滤波程序

void C_meanfilter
(unsigned char ColumnA[],unsigned char ColumnB[],unsigned char ColumnC[],
int WIDTH,unsigned char ColumnP[])
{
    int j,k,l;
    unsigned char  midbuff,buff[9];
    for (j=0;j<WIDTH-2;j++)  
	{	        
	   buff[0]=ColumnA[j];
	   buff[1]=ColumnA[j+1];
	   buff[2]=ColumnA[j+2];
	   buff[3]=ColumnB[j];
	   buff[4]=ColumnB[j+1];
	   buff[5]=ColumnB[j+2];
	   buff[6]=ColumnC[j];
	   buff[7]=ColumnC[j+1];
	   buff[8]=ColumnC[j+2];
	   for(k=0;k<9;k++)
	   {
	     for(l=k+1;l<9;l++)
	     {
	      if(buff[k]>buff[l]) 
	      {
	        midbuff=buff[k];
	        buff[k]=buff[l];
	        buff[l]=midbuff;
	      } 
	     }
	   }
	  ColumnP[j+2] = buff[4];     
	}
}