MATLAB: How to display mosaiced image as checkerboard format….

Question

i used the code in the below link for image-mosaicing…

http://www.mathworks.in/matlabcentral/fileexchange/30849-image-mosaic-using-sift

please can someone help me to display the output as Checkerboard mosaiced image as shown in the link below….

http://oi57.tinypic.com/16hueyp.jpg

please do reply..

Answer 1

Use the checkerboard() function to create a mask. Then mask in the second image. Try this demo:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
imtool close all;  % Close all imtool figures if you have the Image Processing Toolbox.
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 30;
% Check that user has the Image Processing Toolbox installed.
hasIPT = license('test', 'image_toolbox');
if ~hasIPT
  % User does not have the toolbox installed.
  message = sprintf('Sorry, but you do not seem to have the Image Processing Toolbox.\nDo you want to try to continue anyway?');
  reply = questdlg(message, 'Toolbox missing', 'Yes', 'No', 'Yes');
  if strcmpi(reply, 'No')
    % User said No, so exit.
    return;
  end
end
% Read in a standard MATLAB gray scale demo image.

folder = fileparts(which('cameraman.tif')); % Determine where demo folder is (works with all versions).
button = menu('Use which demo image?', 'CameraMan', 'Moon', 'Eight', 'Coins', 'Pout');
if button == 1
  baseFileName = 'cameraman.tif';
elseif button == 2
  baseFileName = 'moon.tif';
elseif button == 3
  baseFileName = 'eight.tif';
elseif button == 4
  baseFileName = 'coins.png';
else
  baseFileName = 'pout.tif';
end
%===============================================================================
% Read in a standard MATLAB gray scale demo image.
% Get the full filename, with path prepended.
fullFileName = fullfile(folder, baseFileName);
% Check if file exists.
if ~exist(fullFileName, 'file')
  % File doesn't exist -- didn't find it there.  Check the search path for it.
  fullFileNameOnSearchPath = baseFileName; % No path this time.
  if ~exist(fullFileNameOnSearchPath, 'file')
    % Still didn't find it.  Alert user.
    errorMessage = sprintf('Error: %s does not exist in the search path folders.', fullFileName);
    uiwait(warndlg(errorMessage));
    return;
  end
end
grayImage = imread(fullFileName);
% Get the dimensions of the image.  
% numberOfColorBands should be = 1.
[rows, columns, numberOfColorBands] = size(grayImage);
if numberOfColorBands > 1
  % It's not really gray scale like we expected - it's color.
  % Convert it to gray scale by taking only the green channel.
  grayImage = grayImage(:, :, 2); % Take green channel.
end
% Display the image.



subplot(2, 2, 1);
imshow(grayImage);
axis on;
title('Image #1', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Give a name to the title bar.
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off') 
% Make a version of the image that is darkened by half
dimImage = grayImage / 2;
% Display the image.
subplot(2, 2, 2);
imshow(dimImage);
axis on;
title('Image #2', 'FontSize', fontSize);
% Create a checkerboard
cb = checkerboard(50, 5, 5) > 0;
% Resize it
cb = imresize(cb, size(grayImage));
% Display the image.
subplot(2, 2, 3);
imshow(cb);
axis on;
title('Checkerboard', 'FontSize', fontSize);
% Create the output image
out = grayImage; % Initialize
% Now replace white parts of checkerboard with dimImage
out(cb) = dimImage(cb);
% Display the image.
subplot(2, 2, 4);
imshow(out);
axis on;
title('Mosaic Image', 'FontSize', fontSize);