MATLAB: Change file name on execution

image processingMATLAB

urgent help here please… trying to change the file name on this code on each instance of running the function

   f=imread('Plate_7.jpg'); % Reading the number plate image file

i want the 'Plate_1' to increment by 1 each time the program runs to 'Plate_2', 'Plate_3'… and so on!

i have tried using a for loop

for k=1:10
   file=sprintf('Plate_%d.jpg',k)
   f=imread('Plate.jpg'); % Reading the number plate image file
end

but this just lists image 1 up to 10 in the command window…

Best Answer

for k=1:10
 file=sprintf('Plate_%d.jpg',k)
 f{k}=imread(file); 
end

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MATLAB: Read images from folder

See the code snippet in the FAQ:

https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Which you'd adjust like this:

% Specify the folder where the files live.
myFolder = fullfile(pwd, '..\TRAINING SET');
% Check to make sure that folder actually exists.  Warn user if it doesn't.
if ~isfolder(myFolder)
    errorMessage = sprintf('Error: The following folder does not exist:\n%s\nPlease specify a new folder.', myFolder);
    uiwait(warndlg(errorMessage));
    myFolder = uigetdir(); % Ask for a new one.
    if myFolder == 0
         % User clicked Cancel
         return;
    end
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.BMP'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
    baseFileName = theFiles(k).name;
    fullFileName = fullfile(theFiles(k).folder, 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.
end

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

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.

Best Answer

Related Solutions

MATLAB: Read images from folder

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

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