pImg_mdf = new BYTE [iWidth * iHeight];/// to store the difference image
int N = 8; // block size 8x8
int R = 16; //Range for searching 16x16 block
int dy,dx;
//int MAD_min = 256;
for(int i=0; i<iHeight-N; i+N)
    for(int j=0; j<iWidth-N; j+N){
        int MAD_min=256*N*N, mvx=0,mvy=0;
        for(int k =-R;k<=R;k++)
            for(int l =-R;l<=R;l++){

                int MAD=0;
                for(int p=i;p<=i+N-1;p++)
                    for(int q=j;q<j+N-1;j++){
                        if ((p+q > 0)&&(p+q < iHeight + 1)&&(q+l > 0)&&(q+l < Wp + 1))
                            MAD += abs(pImg_f1[p*Wp+q] - pImg_f2[(p+k)*Wp+q+l]);

                    }
                    MAD = MAD/N*N;
                    if(MAD<MAD_min){
                        MAD_min = MAD;
                        dy = k;dx = l;
                    }
            }
                for(int x=i;x<i+N-1;x++) ///store the best matching block
                for(int y=j;y<j+N-1;y++){
                    pImg_mdf[x*Wp+y] = pImg_f2[(i+dy)*Wp+dx];
                    pImg[x*Wp+y]= pImg_mdf[x*Wp+y];
                }





    }
    OnDraw(GetDC());