MATLAB: Changing pictures

exitpausestart

hi how can I create a gui that will show different pictures on the same axes but displaying only one at a time automatically

Best Answer

Define "automatically." Do you mean in a for loop? See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F so you'll know how to do stuff like this:

filePattern = fullfile(myFolder, '*.jpg');
jpegFiles = dir(filePattern);
for k = 1:length(jpegFiles)
  baseFileName = jpegFiles(k).name;
  fullFileName = fullfile(myFolder, baseFileName);
  fprintf(1, 'Now reading %s\n', fullFileName);
  imageArray = imread(fullFileName);
  imshow(imageArray);  % Display image.
  drawnow; % Force display to update immediately.
    promptMessage = sprintf('Do you want to Continue or Cancel?');
    button = questdlg(promptMessage, 'Continue', 'Continue', 'Cancel', 'Continue');
    if strcmpi(button, 'Cancel')
    break;
    end
end

Related Solutions

MATLAB: How should i compress the some multiple images by 1st converting to them gray scale and all images are supposed to be of same size.

This could be because you are using imshow.

Convert your image to grayscale using:

I = rgb2gray(img);

% Resize your image

I=imresize(I,[a,b]); specify the dimensions you want

% Finally write your image

% imwrite(I,'name.jpg');

MATLAB: How to read all the images in a folder??

You can use dir to get a structure with of the files listed, and you can use a wildcard search too:

myFolder = 'C:\Documents and Settings\yourUserName\My Documents\My Pictures';
if ~isdir(myFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
  uiwait(warndlg(errorMessage));
  return;
end
filePattern = fullfile(myFolder, '*.jpg');
jpegFiles = dir(filePattern);
for k = 1:length(jpegFiles)
  baseFileName = jpegFiles(k).name;
  fullFileName = fullfile(myFolder, baseFileName);
  fprintf(1, 'Now reading %s\n', fullFileName);
  imageArray = imread(fullFileName);
  imshow(imageArray);  % Display image.
  drawnow; % Force display to update immediately.
end

This example if taken straight from the Wiki FAQ:

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Best Answer

Related Solutions

MATLAB: How should i compress the some multiple images by 1st converting to them gray scale and all images are supposed to be of same size.

MATLAB: How to read all the images in a folder??

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