How can I read text from pdf in Matlab?

How can I read text from pdf in Matlab? I tried this code

a=OCR(unit8(test.pdf);

After the execution of the above code value of a is empty.

There is any other option which one I can use.

[Balkar Singh]

Thanks in advance

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/textanalytics/ref/extractfiletext.html

[Balkar Singh]

Thanks sir

[Balkar Singh]

Sir how can I modify the text after reading from pdf file. Thanks in advance.

[Walter Roberson]

The result is a string object. https://www.mathworks.com/help/matlab/ref/string.html

You can use any of the string operations. See https://www.mathworks.com/help/matlab/matlab_prog/analyze-text-data-with-string-arrays.html and https://www.mathworks.com/help/matlab/matlab_prog/searching-and-replacing.html

[Balkar Singh]

Thanks sir..

[Balkar Singh]

Sir it is not working for png, jpeg etc image. There is any other option in Matlab to read text from these types of images.

Thanks

[Walter Roberson]

the image file itself is gone, converted to pixel representation.

https://www.mathworks.com/matlabcentral/answers/436679-how-to-read-an-image-into-matlab-stored-as-pdf#comment_654452

It is probably easier to invoke external software to extract the images. Once you have the images you can ocr them. http://www.peteryu.ca/tutorials/publishing/pdf_manipulation_tips2

[Balkar Singh]

I tried this but not able to find the exact solution. I also tried OCR but it works for a small image.

Thanks