It is pretty picky about the input images format, but once you got that right the results are decent enough. Tesseract, ocrad, cuneiform, gocr, ocropus, tocr, abbyy cli ocr, leadtools ocr sdk, ocr api service, wagnerfischer. In this comparison done by peter selinger, ocrad comes out just behind tesseract. With optical character recognition ocr, you can scan the contents of a document into a single file of editable text. The a9t9 free ocr for windows desktop tool is a graphical user interface frontend gui for the tesseract engine. Hey, there are many open source ocr capable libraries. There have been some other comparisons on the performance of ocrad versus gocr. The gnu general public license version 2 was used as text. It can be used to convert or scan image files into text files. All the 3 services were provided with the same binary image that contains some slightly blurred text. The handwriting recognition worked best in gocr which delivered only mediocre results for the other images. I also noticed that it might be poor in extracting digits. Top 10 best ocr software for pc to reduce your retyping hassle.
Optical character recognition with tesseract ocr on ubuntu 7. Questions and postings pertaining to the usage of imagemagick regardless of the interface. In 2006 tesseract was considered one of the most accurate opensource ocr engines then. Ocrfeeder is an optical character recognition suite for gnome, which also supports virtually any commandline ocr engine, such as cuneiform, gocr, ocrad and tesseract. Developers describe opencv as open source computer vision library. Benjamin eikels homepage comparison of free ocr software.
Opencv was designed for computational efficiency and with a strong focus on realtime applications. Abby ocr, cuneiform, gocr, ocrad, tesseract comparison. In this comparison the programs gocr package version 0. 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. A possible conclusion is that ocrad and gocr work best on inputs where each letter is clearly separated. Gocr from is an ocr optical character recognition program. 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. How to solve simple captchas using python tesseract. One has only to install in ubuntu its ocr engines of choice one or more and then detect them in. I have tried tesseract with iphone and assessed its accuracy to be 70% without image preprocessing.
Free software cuneiform gocr ocrad ocrfeeder ocropus tesseract proprietary software expervision. Tesseract software wikimili, the best wikipedia reader. In terms of runtime, ocrad is very fast, tesseract is tolerable, and gocr is very slow. 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. Ocrad is an optical character recognition program, developed as part of the gnu project. In 1995, it was one of the toptier performers at unlvs ocr competition, but when hp. Ocrad can be used for standalone console application as the backend of any other form. Gocr, tesseractocr, ocrad, clara which linux ocr solution should i install.
It is capable of analyzing separate row and column from images. 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. From playing with the draw tool, it seems that ocrad is much more predictable and forgiving for minor alignment and orientation errors. Openkm can be integrated with any ocr engine that can be executed from the command line. 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. It doesnt make character recognition itself, but uses other ocr apps through so called ocr engines settings instead. The results were still pretty bad with this image, but better than my manual tests with gocr tesseract. 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. 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. Comparison of optical character recognition ocr software by angelica gabasio departmentofcomputerscience.
Combined with the processing library of leptonic image can read a wide variety of image formats and turn them into text. A benchmarking test with prima comparison of abbyy finereader and tesseract on selection of 20 documents. 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 has predefined settings for tesseract, cuneiform, gocr and ocrad, so the user doesnt need to know how to invoke them. 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. Openkm can work with several ocr engines, for example tesseract 2. Googles tesseract ocr engine is a quantum leap forward.
There are several free software ocr technologies available for your optical character recognition pleasure. In the opensource world, there are relatively few choices of quality ocr software. It supports many languages, output text formatting, hocr positional information and page layout analysis. Tesseract is an optical character recognition ocr engine with very high accuracy.
While not bad with latin characters and numbers, it struggles with japanese characters for instance. You might have to first feed it training data depending on what you want to get recognized. In 1995, this engine was among the top 3 evaluated by unlv. 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.
All of them are command line tools which inputs images and spits out text. But still tesseract seems to fail when other commercial product return decent results. 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. The resolution of the image had only little to no impact. To extract the text from a scan, you have to use ocr software such as gocr, ocrad, tesseract or cuneiform. I have successfully used tesseract for optical character recognition, on ubuntu. It supports many languages, output text formatting, hocr. Comparison of optical character recognition ocr software.
Tesseract is the most acclaimed opensource ocr engine of all and was initially developed by hewlettpackard. Tesseract is an open source ocr engine that was developed in hp between 1984 and 1994. Neocr is a free software based on tesseract open source ocr engine for the windows operating system. This document compares three different linux ocr programs. 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. Tapas kanungos optical character recognition ocr page. Its considered one of the most accurate ocr engines currently available, with the precision depending on the clearness of the image. Of course the result is still far from the original poetry. How to scan and ocr like a pro with open source tools. It is free software, released under the apache license, version 2. Ive heard about gocr, ocrad, tesseract but never used them. A commercial quality ocr engine originally developed at hp between 1985 and 1995. Gnulinux is a free and open source software operating system for computers.
Tesseract is an open source ocr engine for various operating systems. Gocr is a free optical character recognition program, initially written by jorg schulenburg. Optical character recognition ocr is a difficult and finicky problem. There are some open source libraries for ocr such as tesseract, gocr, javaocr, and ocrad. I used the following test image and here are the results obtained with tesseract 3. 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.
869 629 180 310 769 1442 1059 845 953 1288 619 551 1075 645 22 535 288 831 557 1178 456 1513 1008 991 1077 493 1104 16 94 1183 1431 167 1381 708 271 892 256 100 375 748 872 24