8 bit depth RGB image(gif)

is it possible to separate red ,green and blue channel of a 8 bit depth gif image with the following code?

 redimg=im;
      blueimg=im;
      redimg(:,:,2:3)=0;
      blueimg(:,:,1:2)=0;
      greenimg=im;
      greenimg(:,:,3)=0;
      greenimg(:,:,1)=0;

if not then how can that be achieved?

Answer 1

[Image Analyst]

Copy and paste this example code:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables.
workspace;  % Make sure the workspace panel is showing.
fontSize = 20;

% Change the filename to your filename!
[gifImage cmap] = imread('C:\Users\yourname\Pictures\whatever.gif');

% Display indexed GIF image.
subplot(2,3, 1);
imshow(gifImage);

% Convert to true color RGB image.
rgbImage = ind2rgb(gifImage, cmap);
title('GIF Image', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);

subplot(2,3, 2);
imshow(rgbImage);
title('After conversion to RGB', 'FontSize', fontSize);

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);

% Display the three component color channels.
subplot(2,3, 4);
imshow(redChannel);
title('Red Channel', 'FontSize', fontSize);
subplot(2,3, 5);
imshow(greenChannel);
title('Green Channel', 'FontSize', fontSize);
subplot(2,3, 6);
imshow(blueChannel);
title('Blue Channel', 'FontSize', fontSize);

[Mahua Nandy(Pal)]

thank u for clearing my doubts.