i used lsb method to embed message bits in lsb. in coding i cannot get how to select the lsb bit. please help me

clc
clear all
close all
a=imread('cameraman.tif');
x=dec2bin('cameraman.tif');
c=imshow(a);

y=dec2bin('s');

q=8;
for i=1:size(a) %for every pixel of image
    for j=1:8 % for message bits
    f=bitget(a(i),7)
    end
end

[Geoff Hayes]

Have you already embedded the message in to the LSB, or are you trying to do this? Why do you call dec2bin and not use the result, x? Perhaps add some comments to you code so that we can get an idea of what you are attempting (and why)