MATLAB: How do i get a webcam to capture an image and store the image in a folder and continuously do so while changing the file name for each new image

anprimage processingMATLAB

this is what i have tried to use so far to save captured image but it hasnt worked…

counter = 1;
baseDir = 'C:\Users\Nakk\Documents\MATLAB';
baseName = 'Nakk_'; %Nakk is the name i have chosen for the image files
newName = [baseDir baseName num2str(counter) '.jpg'];
while exist(newName,'file')
counter = counter + 1;
newName = [baseDir baseName num2str(counter) '.jpg'];
end
imwrite(img, newName);

Best Answer

Notice that your baseDir does not end with a file separator, such that Matlab checks for the files "C:\Users\Nakk\Documents\MATLABNakk_1.jpg" etc.

Better use fullfile instead of the concatenation of the path with [ and ]:

newName = fullfile(baseDir, sprintf('%s%d.jpg', baseName, counter));

I prefer sprintf instead of num2str for such cases.

Related Solutions

MATLAB: I have few images, i want to create folders, and names of folders should be identical to images. and want to save those images in folders having identical names.

Try this:

% Specify the folder where the files live.
myFolder = 'D:\My Pictures\Misc'; % Wherever...
% Check to make sure that folder actually exists.  Warn user if it doesn't.
if ~isdir(myFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
  uiwait(warndlg(errorMessage));
  return;
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.PNG'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
  baseFileName = theFiles(k).name;
  fullFileName = fullfile(myFolder, baseFileName);
  fprintf(1, 'Now reading %s\n', fullFileName);
  % Now do whatever you want with this file name,
  % such as reading it in as an image array with imread()
  imageArray = imread(fullFileName);
  imshow(imageArray);  % Display image.
  drawnow; % Force display to update immediately.
  % Create a folder with the base file name
  [~, baseFileNameNoExt, ~] = fileparts(baseFileName);
  outputFolder = fullfile(myFolder, baseFileNameNoExt);
  if ~exist(outputFolder, 'dir')
    mkdir(outputFolder);
    fprintf('Created folder : %s\n', outputFolder);
  end
  % Prepare output filename
  outputFileName = fullfile(outputFolder, baseFileName);
  % Copy file to that folder
  copyfile(fullFileName, outputFileName);
  fprintf('    Copied %s to the folder called %s.\n', baseFileName, outputFolder);
end

MATLAB: MATLAB Figure file trouble

Since I don't have your full code, I have made two assumptions:

I have changed the button's TAG to "button_capture"
Make sure your capture button code returns newName (if it is a separate function, if you do that in the callback, then don't worry).

Now find the callback when the button is pressed.

This will then be something like:

function button_capture_Callback(hObject, eventdata, handles)
% Run the capture button code
[newName] = capture_button_code(varargin);
% hObject is the calling object, ie; our button, we now update it's string
set(hObject,'String',newName)

Best Answer

Related Solutions

MATLAB: I have few images, i want to create folders, and names of folders should be identical to images. and want to save those images in folders having identical names.

MATLAB: MATLAB Figure file trouble

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