MATLAB: “Spot the difference” game code

differencesImage Processing Toolboxspot the difference

hi i need a code which 1. detect 2 similar image and crop them out(example from browser) 2. detect the differences between 2 images 3. show the differences, count and label them(example difference no.1,difference no.2)

basically the code is like a cheat to the "spot the differences" game and tell u how many and where are the differences. Appreciate if some1 could help me on the code. Thanks in advance.

Best Answer

Try to just subtract them:

differenceImage = single(image1) - single(image2);
imshow(differenceImage, []);

Then you can threshold and blacken the differences, or make them red, or outline them, or whatever you want to do.

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Try this

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 15;
%===============================================================================

% Get the name of the image the user wants to use.
baseFileName = '1.png';
% Get the full filename, with path prepended.
folder = pwd
fullFileName = fullfile(folder, baseFileName);
% Check if file exists.
if ~exist(fullFileName, 'file')
  % The file doesn't exist -- didn't find it there in that folder.
  % Check the entire search path (other folders) for the file by stripping off the folder.
  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
%===============================================================================
% Read in demo image.
rgbImage = imread(fullFileName);
% Get the dimensions of the image.
[imageRows, imageColumns, numberOfColorChannels] = size(rgbImage);
% Display the original image.
subplot(1, 3, 1);
imshow(rgbImage, []);
axis on;
caption = sprintf('Original Color Image, %s', baseFileName);
title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
% Set up figure properties:
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Get rid of tool bar and pulldown menus that are along top of figure.
set(gcf, 'Toolbar', 'none', 'Menu', 'none');
% Give a name to the title bar.
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')
drawnow;
hp = impixelinfo(); % Set up status line to see values when you mouse over the image.
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Threshold to get the blue mask.
yellowMask = redChannel > 150 & greenChannel > 150 & blueChannel < 150;
% Fill it.
yellowMask = imfill(yellowMask, 'holes');
% Display the image.

subplot(1, 3, 2);
imshow(yellowMask);
grid on;
axis on;
title('Yellow Mask Image', 'FontSize', fontSize);
% Find boundingBox
props = regionprops(yellowMask, 'BoundingBox');
croppedImage = imcrop(rgbImage, props.BoundingBox);
% Display the image.
subplot(1, 3, 3);
imshow(croppedImage);
axis on;
caption = sprintf('Final, Cropped Image');
title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
drawnow;

MATLAB: Read three different RGB band and Swap the Band

Try this:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Now swap around in any way you want.
newRedChannel = greenChannel;
newGreenChannel = blueChannel; 
newBlueChannel = redChannel;
% Recombine separate color channels into a single, true color RGB image.
NewRgbImage = cat(3, newRedChannel, newGreenChannel, newBlueChannel);

Best Answer

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