function TTFilter(x,a,b)
im=imread(x);
k=floor(a*b/2)+1;
[h,w]=size(im);
double Y=zeros(h,w);
funBox=zeros(a,b);
temp=zeros(a*b);
for i=1:h-a
    for j=1:w-b
        funBox=im(i:i+a,j:j+b);
        temp=funBox(:);
        tempSort=sort(temp);
        Y(i,j)=tempSort(k);
    end;
end;
figure,imshow(Y);