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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Nakk Mungofa 2014-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/122805-how-do-i-get-a-webcam-to-capture-an-image-and-store-the-image-in-a-folder-and-continuously-do-so-whi

评论： Walter Roberson 2020-4-17

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);

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vasundra wazir 2020-4-16

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can u help me the code. i want to crop the image in gui and save the image in the folder but its nit showing in the axes the image and is not saving in folder. kindly help me with this . its important.

hold on
    for i=1:size(bbox,1)
        rectangle('position', bbox(1,:), 'Linewidth', 5,' Linestyle', '-','Edgecolor','r');
    end
   hold off
    N=size(bbox,1);
    handles.N=N;
    counter= 1;
    for i=1:N
        Face=imcrop(img,bbox(i,:));
        axes(handles.axes2);
        
        imshow(Face);
       savenam= strcat('E:\matlab\Face Recognition & Image Processing System\R_TrainDatabase', num2str(counter));
        baseDir = 'E:\matlab\Face Recognition & Image Processing System\R_TrainDatabase';
        
        newName = [ baseDir savenam num2str(counter) ' .jpg'];
        handles. face= face;
        while exits(newName, 'file')
            counter = counter +1;
            newName = [baseDir num2str(counter) '.jpg'];
             
        end
        
        face= imresize(face, [140 180]);
        Fac=rgb2gray(face);
        imwrite(Fac, newName);
        axes(handles.axes2);
        
      imshow(Face);
    end
    

Walter Roberson 2020-4-17

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savenam= strcat('E:\matlab\Face Recognition & Image Processing System\R_TrainDatabase', num2str(counter));
       

That already has counter as part of it, and then you put the counter in again

newName = [ baseDir savenam num2str(counter) ' .jpg'];

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Answer 1

Jan 2014-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/122805-how-do-i-get-a-webcam-to-capture-an-image-and-store-the-image-in-a-folder-and-continuously-do-so-whi#answer_130032

编辑：Jan 2014-3-24

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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.

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Nakk Mungofa 2014-3-25

编辑：Nakk Mungofa 2014-3-25

oh wow thanks! all the images i was capturing were going into the documents folder and saved as MATLABNakk_1!instead of the MATLAB folder... (its always the smallest details)

alrite thanks for the heads up will try using sprintf

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