I would like to reduce the pixel value of image for each range rgb channel to [0 1], but at the end i get an endless loop

my code is :

I=imread('peppers.png');

im_red = I(:,:,1);

im_green = I(:,:,2);

im_blue = I(:,:,3);

red = double(im_red)/255;

mid_red = (max(red)-min(red))/2;

[redrow redcol]=size(red);

for i=1:redrow

    for j=1:redcol

          if red(i,j) > mid_red

              red(i,j)=1

          else red(i,j)=0

          end

      end

end

Please help me solve the problem

Answer 1

[Sean de Wolski]

red = red>mid_red
%a one liner

[tan yikwang]

Thank for your answer.

Finally, i found my solution with change this line:

from

mid_red = (max(red)-min(red))/2;

to

mid_red = (max(red(:))-min(red(:)))/2;