Thread Subject: for loop

Hi,
I am trying not to use for loop for my code, which is copied below, where bw is a binary image, and so is new_L. I am trying to get a new binary image new_ , which has value 1 at the location where both new_L and bw is 1.
Kindly help.
Thx.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
for j=1:512
                  for k=1:512
                                if bw(k,j)==1 && new_L(k,j)==1
                                    new_(k,j)=1;
                                end
                   end
 end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Use the bitand() function:
new_ = bitand(bw, new_L);
Or simply use logical operations
new_ = bw & new_L;

Thanks a lot ImageAnalysist,
But what if the code is something like below, where non of the 2D images are binary.
Thank you very much.

                       old_2D_Image;
                        for j=1:512
                            for k=1:512
                                if bw(k,j)>201 && new_L(k,j)>50
                                    new_(k,j)= old_2D_Image(k,j);
                                end
                            end
                        end

On Oct 19, 8:53 pm, "Matlab User " <lovlov...@indiatimes.com> wrote:
> Thanks a lot ImageAnalysist,
> But what if the code is something like below, where non of the 2D images are binary.
> Thank you very much.
>
>                        old_2D_Image;
>                         for j=1:512
>                             for k=1:512
>                                 if bw(k,j)>201 && new_L(k,j)>50
>                                     new_(k,j)= old_2D_Image(k,j);
>                                 end
>                             end
>                         end

--------------------------------------------------------------------
Try something like this (untested):

new_ = zeros(size(bw));
indexes = bw>201 && new_L > 50;
new_(indexes(:)) = old_2D_Image(indexes(:));

> --------------------------------------------------------------------
> Try something like this (untested):
>
> new_ = zeros(size(bw));
> indexes = bw>201 && new_L > 50;
> new_(indexes(:)) = old_2D_Image(indexes(:));

--

Or I could also suggest:
new=( bw>201 &new_L > 50).*old_2D_Image;