How to store real-time data in a file that can be accessed in matlab elsewhere?

I am working on a program to extract data from image using OCR and store in variables. The process is that the image will be refreshed with a different value after a regular interval (at least 10 seconds). So, I want to run loop with the following process which extracts the numerical from the image and also stores the time of the process, as demonstrated below

    %% this complete demonstration will be put into a for loop for obtaining data from similar images
    image = importdata('out.png');
    image = imresize(image,4);
    image = uint8(255*imbinarize(rgb2gray(image)));
    %imshow(image)
    ocrResults  = ocr(image, TextLayout="word");
    Iocr         = insertObjectAnnotation(image,'rectangle',ocrResults.WordBoundingBoxes,ocrResults.WordConfidences);
    imshow(Iocr);

Once OCR gets the value, I store the value and the time (at the instance of OCR processing) into the table.

    datavalue = str2num(ocrResults.Text);
    time = datetime('now','TimeZone','Asia/Seoul','Format','yyyy-MM-dd HH:mm:ss.SSS');
    time = cellstr([string(time)]);     % for storing time for exporting
    disp([datavalue time])              % this is just for demonstrating the output

    {[260.4900]}    {'2023-01-05 11:43:41.464'}

Currently, I used the following code to store in the excel file (it takes a second to store). Since the above-mentioned process will be put in a for-loop, so I am just writing the storing code.

xlswrite('name.xls', ftime, sheetNumber, ['A' num2str(i)]);

xlswrite('name.xls', data, sheetNumber, ['B' num2str(i)]);

I have very basic knowledge of Matlab, and I want to efficiently store these data into some sort of file (or files) in a LAN shared folder from 4 computers and then access the data in another computer for processing in realtime (the data keeps on updating).

[VBBV]

Read about datastore

https://in.mathworks.com/help/matlab/datastore.html

https://in.mathworks.com/help/matlab/ref/matlab.io.datastore.imagedatastore.html

Answer 1

[Avinash]

Hi Usman

• By keeping the MATLAB current working directory in the same place as the target folder, you can first create a new text file using the fopen function in the target folder location that is accessible from other machines as well.
• Additionally, you can override the contents of an existing file by using the fopen and fprintf function.
• To write into a text file, keep the property set to "wt".
• Then, use the writetable function to write your data in table format.

To learn more about the fopen, fprint and writetable functions, refer the documentation links mentioned below:

• Open file, or obtain information about open files - MATLAB fopen - MathWorks India
• Write table to file - MATLAB writetable - MathWorks India
• Write data to text file - MATLAB fprintf - MathWorks India

Thanks

Avinash