In this comparison the programs gocr package version 0. Openkm can work with several ocr engines, for example tesseract 2. I really miss the old days on my commodore 64 and amiga which had software that could look in a screen boxed text and tell you exactly what the text. This article, which focuses on scanning books, describes the steps you need to take to prepare pages for optimal ocr results, and compares various free ocr tools to determine which is the best at.
Gnulinux is a free and open source software operating system for computers. In terms of runtime, ocrad is very fast, tesseract is tolerable, and gocr is very slow. Tesseract software wikimili, the best wikipedia reader. Optical character recognition ocr is a difficult and finicky problem. The a9t9 free ocr for windows desktop tool is a graphical user interface frontend gui for the tesseract engine. Combined with the processing library of leptonic image can read a wide variety of image formats and turn them into text. Comparison of optical character recognition ocr software. The handwriting recognition worked best in gocr which delivered only mediocre results for the other images. Both new services use a different ocr component and have much better text recognition rates than the tesseractbased ocr desktop software on this page. Excerpt compare tesseract vs typereader vs readiris vs abbyy vs leadtools vs aquaforest vs omnipage vs ms onenote vs newocr vs ocrfeeder vs omr software vs digital syphon vs gocr vs ocrad vs pix2txt. Googles tesseract ocr engine is a quantum leap forward. In the opensource world, there are relatively few choices of quality ocr software. The tesseract code was written at hewlettpackard in the 1980s and 90s.
Gocr and ocrad performed not very well and created unusable text in some cases. In 2006 tesseract was considered one of the most accurate opensource ocr engines then. Compare tesseract vs typereader vs readiris vs abbyy vs leadtools vs aquaforest vs omnipage vs ms onenote vs newocr vs ocrfeeder vs omr software vs digital syphon vs gocr vs ocrad vs pix2txt. To extract the text from a scan, you have to use ocr software such as gocr, ocrad, tesseract or cuneiform. As with any minor stepping stone on the road to hell relentless trajectory of atwoods law, i probably dont need to justify the existence of yet another x, but now in javascript. It is capable of analyzing separate row and column from images. Ocrad was the fastest tool tested, but you should invest the time better and use tesseract to analyze images. It has predefined settings for tesseract, cuneiform, gocr and ocrad, so the user doesnt need to know how to invoke them. It can also produce text from other sources such as pdfs, images, or folders containing images.
In 1995, it was one of the toptier performers at unlvs ocr competition, but when hp. In this comparison done by peter selinger, ocrad comes out just behind tesseract. I have tried tesseract with iphone and assessed its accuracy to be 70% without image preprocessing. The results were still pretty bad with this image, but better than my manual tests with gocr tesseract. Ive heard about gocr, ocrad, tesseract but never used them. Free software cuneiform gocr ocrad ocrfeeder ocropus tesseract proprietary software expervision. Of course the result is still far from the original poetry. Openkm can be integrated with any ocr engine that can be executed from the command line. Tesseract is an open source ocr engine for various operating systems. Ocrfeeder is an optical character recognition suite for gnome, which also supports virtually any commandline ocr engine, such as cuneiform, gocr, ocrad and tesseract.
This document compares three different linux ocr programs. From playing with the draw tool, it seems that ocrad is much more predictable and forgiving for minor alignment and orientation errors. Tesseract, ocrad, cuneiform, gocr, ocropus, tocr, abbyy cli ocr, leadtools ocr sdk, ocr api service, wagnerfischer. I have achieved the best results with tesseract and the worst with gocr, however the most convenient way to produce hocr files was using cuneiform. Developers describe opencv as open source computer vision library. Optical character recognition with tesseract ocr on ubuntu 7.
Gocr from is an ocr optical character recognition program. Benjamin eikels homepage comparison of free ocr software. All the 3 services were provided with the same binary image that contains some slightly blurred text. Tesseract is an optical character recognition engine for various operating systems. I have successfully used tesseract for optical character recognition, on ubuntu. It is pretty picky about the input images format, but once you got that right the results are decent enough. I used the following test image and here are the results obtained with tesseract 3. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. It can be used to convert or scan image files into text files. But still tesseract seems to fail when other commercial product return decent results. Ocrad can be used for standalone console application as the backend of any other form. A benchmarking test with prima comparison of abbyy finereader and tesseract on selection of 20 documents. Like all gnu software it is free software, and is licensed under the gnu gpl based on a feature extraction method, it reads images in portable pixmap formats known collectively as pnm pbm, pgm and ppm. Gocr, tesseractocr, ocrad, clara which linux ocr solution should i install.
The resolution of the image had only little to no impact. A commercial quality ocr engine originally developed at hp between 1985 and 1995. Abby ocr, cuneiform, gocr, ocrad, tesseract comparison. It converts paper documents to digital document files and can serve to make them accessible to. It supports many languages, output text formatting, hocr positional information and page layout analysis. Opencv was designed for computational efficiency and with a strong focus on realtime applications. Ocrad is an image recognition software to convert pbm, pgm and ppm image into text. I also noticed that it might be poor in extracting digits. Tesseract is the most acclaimed opensource ocr engine of all and was initially developed by hewlettpackard. With optical character recognition ocr, you can scan the contents of a document into a single file of editable text. It converts scanned images of text back to text files clara is another good graphical option ocrad from is an ocr can be used as a standalone console application,or as a backend to other programs kooka from is a kde application but works fine,in addition you have to install actual ocr programs like gocr and. Gocr is a free optical character recognition program, initially written by jorg schulenburg. In 1995, this engine was among the top 3 evaluated by unlv.
Hey, there are many open source ocr capable libraries. It is a freeware which can be redistributed under a general public license. How to scan and ocr like a pro with open source tools. How to solve simple captchas using python tesseract. A possible conclusion is that ocrad and gocr work best on inputs where each letter is clearly separated. Ocrad is much faster on bitonal images than nonbitonal images, which makes it appear that it spends most of its time converting greyscale to bitonal. In 2006, tesseract was considered one of the most accurate opensource ocr engines then available. Tesseract is an open source ocr engine that was developed in hp between 1984 and 1994. All of them are command line tools which inputs images and spits out text. You might have to first feed it training data depending on what you want to get recognized.
Comparison of optical character recognition ocr software by angelica gabasio departmentofcomputerscience. It provides an easy and userfriendly user interface to recognize texts contained in images as well as pdf documents and convert to editable text formats. I am not talking about scanned files, but garden variety images, such as when you take a highdef picture of a blackboard at class, and it is nicely handwritten. Neocr is a free software based on tesseract open source ocr engine for the windows operating system. Tapas kanungos optical character recognition ocr page. It supports many languages, output text formatting, hocr. You must have the files in pnm to use the ocr technology. Top 10 best ocr software for pc to reduce your retyping hassle. While not bad with latin characters and numbers, it struggles with japanese characters for instance. Questions and postings pertaining to the usage of imagemagick regardless of the interface. There have been some other comparisons on the performance of ocrad versus gocr. Tesseract ocr engine is considered one of the most accurate, freely available opensource systems available. The combination of tesseract and ocropus is clearly the project we can most rely on to provide the missing elements of a fullfeatured free ocr suite. There are some open source libraries for ocr such as tesseract, gocr, javaocr, and ocrad.
Tesseract is an optical character recognition ocr engine with very high accuracy. What does strike me however, is that there appears to be no. There are several free software ocr technologies available for your optical character recognition pleasure. The software was installed using the debian gnulinux sid packages. Ocrad is an optical character recognition program, developed as part of the gnu project.