ExtractImageLSB.m

function lsb = ExtractImageLSB(image)
% Function ExtractImageLSB extracts the least significant bits from an
% image array of uint8 values

% Input:
%   array: A 3D array of uint8 values representing a RGB image
% Output:
%   lsb = A 3D array of uint8 values, which contains the LSB for each
%   corresponding entry in the input
%
% Author: Henry Huang

row = size(image,1);
col = size(image,2); % find size of rows and columns
lsb = uint8(zeros(size(image))); % initialise originial lsb array

% for i = 1:row
%     for j = 1:col
%         for k = 1:3 % Nested loops to iterate through rows, cols and layers
%             if mod(image(i,j,k),2) == 0 % Modulo function with respect to 2
%                 lsb(i,j,k) = 0; % set value as 0 if remainder is 0
%             else
%                 lsb(i,j,k) = 1; % else set 1
%             end
%         end
%     end
% end
for i = 1:row
    for j = 1:col
        for k = 1:3 % Nested loops to iterate through rows, cols and layers
            lsb(i,j,k) = mod(image(i,j,k),2);
            % lsb = mod(image,2);
        end
    end
end
lsb = uint8(lsb);
end