OCR technology is revolutionizing the business world by making it possible to quickly convert physical documents into digital formats. OCR is a type of automated data entry technology that can scan printed or handwritten text and convert it into machine-readable text. This saves time and resources, making businesses more efficient.
What is OCR?
Optical character recognition (OCR), sometimes referred to as text recognition, is the process of extracting text from an image so that it can be edited or accessed on a computer. It is commonly used to turn hard-copy legal or historical documents into pdf documents.
OCR technology uses a combination of hardware and software to convert physical, printed documents into machine-readable text. The process of OCR is most commonly used to turn hard copy legal or historical documents into pdf documents so that users can access and edit the original content.
Everything You Need to Know about OCR
If you’re reading this, it’s probably safe to assume that you know what a PDF is. Just about everyone who has worked with a document scanner is familiar with PDF. But you might not know a lot about OCR, though it’s related to PDF.
OCR stands for Optical Character Recognition. This is a popular technology used to recognize text inside an image, such as the text in photos and scanned documents. OCR started to become more commonly used way back in the early 1990s when archives and libraries used OCR technology to scan and digitize old, historical newspapers for a more permanent and more secure record.
OCR has become more advanced since those early beginnings, and today the technology is advanced enough to convert just about every kind of image that contains any written text into machine-readable digital text data. The most advanced OCR solutions can recognize the text with almost perfect accuracy, and this even factors in the handwritten text on photos.
How do OCR works?
OCR software works by identifying the text on an image, breaking it down into individual words, and then reconstructing them into sentences. Optical scanners are used to capture images such as those found in books or magazines; after the scanner captures the image, OCR software is responsible for deciphering the letters and words within it.
In addition, OCR technology takes advantage of artificial intelligence (AI) algorithms to identify languages and styles of handwriting. The software also processes graphics, layout, and formatting features found in documents such as boldface type, italics, etc.
A Quick History Lesson
The Early Years
Actually, the roots of OCR are quite old, as it can be traced way back to before computers. Its roots actually begin from telegraphy technology and reading devices for the visually impaired.
An early trailblazer was Emanuel Goldberg, who worked during the late 1920s and the early 1930s to develop a machine that could search microfilm archives. This machine actually used an early form of optical code recognition. Goldberg called this invention the “Statistical Machine”, and patented it in 1931. Later on, the patent was acquired by the famous computer company IBM.
Around the same time that Goldberg was working on OCR, there was also Edmund Fournier d’Albe. He invented the Optophone, which was a handheld scanner that created tones that corresponded to particular letters and characters as the scanner moved cross a page.
Decades passed, and the Ray Kurzweil founded Kurzweil Computer Products Inc. The company came up with the Omni-font OCR, a technology that could recognize text printed in most fonts. While a few other companies were already using a similar technology for several years already, Kurzweil’s version was much better.
Kurzweil thought that the technology was perfect for the blind, and this why he combined a scanner with a text-to-speech synthesizer into a new machine in 1976. But it was also commonly used upload legal paper and news documents for digital databases.
The 21st Century
At this point in time, OCR became available in a cloud environment, online as a service, and in mobile applications such as foreign language translations. With the use of smartphones and smart glasses, OCR can quickly extract text captured using a digital camera. Basically, you can photograph anything (such a sign on your travels), and then you can get the text in document form.
OCR Today: Full OCR and Zonal OCR
With full OCR, the technology reads the whole document. The OCR then sets a textual layer on top of the PDF document, and this textual layer lets the technology search the whole content of the document. This is great for scanning important documents such as contracts and reports so that crucial phrases and words can be searched.
But there have been new advancements as well. There’s Zonal OCR, which is a more recent development. Within the document, the OCR creates zones to lay out specific margins for entire pages. The data is only extracted from the specified zones, so there’s no data extraction in the areas where it’s not needed.
This method can optimize the data extraction process, as the user can then set their own particular formatting rules.
Uses of OCR
The most common use for OCR technology is to convert printed paper documents into digital text documents that can be stored inside a computer or sent online.
This is obviously a more convenient way of turning a paper document into a digital document, compared to the brute-force method of actually typing the document into a new word processor document. That just takes a lot more time, and the typist (being human), will likely commit a few typing errors here and there. With OCR, it takes only a few moments, and the accuracy is almost perfect.
Once the OCR creates a digital copy of the paper document, the digital document can then be read and edited with a popular word processor such as Microsoft Word. These days, you can use Google Docs as well.
The OCR technology is actually quite prevalent, though. It’s an important component of many commonly-used services and systems. These include such technologies as:
- Aids for the blind
- Converting handwritten notes to machine-readable text
- Data entry for business documents (such as bank statements, invoices, and receipts)
- Defeating CAPTCHA anti-bot systems
- Extracting contact information from documents or business cards
- Making electronic documents searchable like Google Books or PDFs
- Passport recognition for airports
- Traffic sign recognition
It’s sometimes surprising to find out that all these advancements started out just to let historians and archivists maintain a more convenient library of old newspapers. Today, those old newspapers are fully searchable, so you can quickly find the articles you’re looking for when you’re doing historical research.