![]() OCR software identifies text from scanned documents or images and converts the text into a searchable or editable format, such as Microsoft Word or plain text. This roundup will compare some of the best free, open source OCR tools so that you can choose one for your projects. There are multiple OCR tools on the market. Optical character recognition (OCR) software allows you to convert non-editable files, like PDF files or images, into editable text. Other than direct scanning of papers, you can also import image files and extract text from them.There are multiple benefits to digitizing documents for your business, but once a text document has been turned into a PDF, how do you search or edit the text? There are programs available to solve this problem, and many of them are both free and open source. It also supports multiple OCR engines including Tesseract OCR, GOCR, Ocropus and Cuneiform, as long as packages for these engines are installed on your system. It can directly work with scanners to scan papers and then export OCR detected text content into PDF files. Gscan2pdf is a free and open source graphical utility that can identify and extract text from a variety of file formats. The package included in the Ubuntu repository was much smaller in size. However, the flatpak build came with all four supported OCR engines though it downloaded around 2GB data. Note that in my testing, OCRFeeder installed from Ubuntu repositories came with only one OCR engine. A universal flatpak package is also available here. You can install it in other Linux distributions from default repositories through the package manager. To install Tesseract OCR in Ubuntu, use the command specified below: Tesseract OCR comes with multiple detection engines and you can use them according to your needs depending on the installation method. You can also use your own trained data if you need a custom solution or you can get more models from third parties. It comes with a set of pre-trained data that can be used to identify and extract text. It can detect text in many languages with good accuracy. ![]() It provides command line tools as well as an API that you can integrate in your own programs. Sponsored by Google, and maintained by many volunteers, it is probably the most comprehensive OCR suite available out there that can even beat some paid, proprietary solutions. Tesseract OCR is a free and open source OCR software available for Linux. ![]() This technique is specially used to digitize old documents into PDF format. Superimposed text allows you to read content in original print and format but also allows you to select and copy text. Most OCR software can extract text into separate files, though some also support superimposing a hidden text layer on original files. Manual edits can be made later to improve accuracy further and create one-to-one replicas. ![]() Sometimes the identified text may not be 100% accurate but OCR software removes the need for manual edits to a great extent by extracting as much text as possible. These OCR software are especially useful for converting and preserving old documents as they can be used to identify text and create digital copies. For instance, an OCR software can identify text from images, PDF or other scanned documents in digital file formats using various algorithms and AI based solutions. An optical character recognition (OCR) software attempts to detect text content of non-text files whose content cannot be selected or copied but can be viewed or read. This article will cover a list of useful “Optical Character Recognition” software available for Linux. ![]()
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