How to Run an Offline OCR Tool on a Chromebook

Nov. 5, 2020



Chromebooksare generally looked down upon when it comes to performing heavy operations related to digital publishing, media conversion,photo editing, and so on. However, there are certain ways you can perform many of the tasks if you have the penchant to solve problems. In this article, we are taking a look at how to run a powerful offline OCR tool on a Chromebook. You will be able to convert images and non-searchable documents using apowerful OCR service. So on that note, let’s go ahead and find the instructions to perform OCR conversion on a Chromebook.

Use Offline OCR Tool on a Chromebook

Use Offline OCR Tool on a Chromebook

Here, we are going to use thepowerful Tesseract OCR servicethat is open-source, free, and maintained by Google. Since it’s a command-line tool, we will be using gImageReader which is developed on Tesseract’s engine. It has a GUI interface and works really well without any issues.

On the Chromebook, we are going to use the Windows version of gImageReader for which we need Linux support. And we will use acompatibility layer called Wineto runWindows appson a Linux system. Bear in mind, Chromebooks issued by schools won’t be able to use this method due to the lack of Linux support.

If you find the instructions lengthy and complex then you can use online OCR services (e.g. newocr.com). As for this article, I amstrictly explaining an offline wayto perform OCR conversion. On top of that, the process is completely free and can convert large stacks of documents on your Chromebook just like native apps so that is great. Having said all of that, let’s now go through the guide.

  1. First of all,enable Linuxandset up Wineon your Chromebook by following ourlinked guides. The process is a bit lengthy but certainly doable.

  2. Next,run the below commandsone by one in the Linux Terminal to keep your Linux up to date.

  3. Having done that,download gImageReader(Free) and move it to the Linux files section. After that, rename it to something short. For instance,gimage. Also, move the image or PDF file to the Linux files section that you want to convert.

  4. Now, open the Linux terminal and run the below command to install gImageReader. It will start asetup wizard just like Windows. So just click on “Next” and install the application.

  5. After the installation, execute the below command in the Linux Terminal to run gImageReader. Make sure tochangeusernameto the actual usernameyou have assigned to Linux on your Chromebook. To find it, check the initial name before@penguinunder the Linux Terminal. That’s your username.

Note:If you want to open gImagReader through an easy shortcut then refer to our above guide on how to set up Wine and go through the shortcut section.

  1. Now, the OCR tool will open up on your Chromebook. Click on the “File” icon to get started.

  2. Here, click on/and navigate tohome -> username. You will find the PDF file that you had moved to the Linux section. Select and open it.

  3. Now, simply click on “OCR Mode” andchange it to “hOCR, PDF”if you want a searchable output in PDF format. If you just want searchable text then keep it “Plain Text”. Finally, click on “Recognize all” and it will start the OCR conversion. Keep in mind, depending on the size of the document, the process may take some time.

  4. Finally, click on the Export icon located at the right pane and select “Export to PDF“. Next, click on “OK” if you get a dialog box.

  5. Now select where do you want tosave the converted document. Make sure to open/and navigate to home -> username and then save the file.

  6. This is what the converted document looks like. The conversion is absolutely on point with minimal errors. For good measures, I also threw a heavy file (36MB) having 41 pages and itconverted the whole filelike a charm.

Our tutorial will work with all of the following Chromebooks. It is not an exhaustive list and is only here to serve as an example.

So that is how you can run an offline OCR tool on a Chromebook with help of Linux and Wine. Sure, the installation process is a bit tedious but once you have set it up, it’s immensely helpful to convert OCR files to searchable PDFs in a jiffy.

For the record, I tried the dedicated Debian installer of gImageReader but the output was not as good as the Windows one which is pretty weird. Anyway, that is all from us. For more such tips, go through our article on thebest Chrome OS tips and tricks.

Passionate about Windows, ChromeOS, Android, security and privacy issues. Have a penchant to solve everyday computing problems.

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