one of the code in tmp.m file: M(i,j)=corr/sqrt(sum(sum(Nimage.^2))) that used for Nimage(target image) normalization, whether is it lack of a normalizated for image22(template image)? i modified M(i,j):M(i,j)=corr/sqre(sum(sum(Nimage.^2))) *sum(sum(image22.^2)))) , is it necessary?