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Archive for the ‘software’ Category

Design Patterns at a glance!

Posted by sureshkrishna on December 8, 2009

There is this short test on the web floating around. I captured the screen for everyones reference. I felt this is a simple, precise explanation of patterns. Enjoy.

Simple and Precise wording.


Posted in software, Technology | Tagged: , , | Leave a Comment »

PGP Plugin for Thunderbird (instructions)

Posted by sureshkrishna on November 25, 2009

Recently, I had to use the PGP for the first time when one of my colleague wanted to send some documents securely. Over all, this is an easy process and works quite well. I use Windows XP, Thunderbird and gnupg for this to work. Following are some instruction to do this…

You download the software from if you’re using Windows. If you have Linux, you most likely already have GnuPG.

Enigmail is the plug-in for Thunderbird. You can get it from Alternately, on GNOME-based Linux, check out Seahorse. You can use GnuPG with Outlook, but it isn’t pretty. I would recommend Thunderbird any day.

The software will generate a key pair for you.

Unlike traditional S/MIME, where you use an X.509 certificate signed by a trusted CA, PGP / GnuPG is based on a more general model. You determine if a key is “valid” if it has been signed by someone you “trust”. So, let’s say, you trust that I will not sign any key without verifying that it actually belongs to who it says it belongs to. Then, you can be assured that any key you get that is signed by me is valid.

For distribution, you can upload your public key to a few key servers at PGP and MIT. Keep your private key, well, private.

Signing a message is easy. You just click a button in Thunderbird that says, “Sign message”.

Encryption requires that you have the public key of the person you’re sending the message to. Either he can give it to you, or you can download it from a key server that you trust and that he’s uploaded it to. Once the public key is downloaded, it is stored in your “keyring”. When you send a message to a person whose public key you have, you can click the “Encrypt” button, and it will work.

Posted in software | Tagged: , , , , | 2 Comments »

Commercial and OpenSource OCR Softwares

Posted by sureshkrishna on November 4, 2009

After testing the FineReader, OmniPage, ReadIRIS, and SimpleOCR, Aspire, Tesseract….it is evident that ABBYY FineReader 9 is the best overall value, while ReadIRIS is the best OCR software for under $150.

The main features that differentiate OCR software are:

  • Character recognition accuracy
  • Page layout reconstruction accuracy
  • Support for languages
  • Support for searchable PDF output
  • Speed
  • User interface
  • API / SDK
  • Support / Consulting
  • Stability of the engine when processing large documents
Following are some of the Softwares that i played with and compared.
SimpleOCR is the popular freeware OCR software with hundreds of thousands of users worldwide.  SimpleOCR is also a royalty-free OCR SDK for developers to use in their custom applications. If you have a scanner and want to avoid retyping your documents, SimpleOCR is the fast, free way to do it.  The SimpleOCR freeware is 100% free and not limited in any way.  Anyone can use SimpleOCR for free–home users, educational institutions, even corporate users. Our own freeware OCR application provides acceptable accuracy for those who just need to convert a few pages and can’t justify the cost of commercial OCR software.  Developers can use the command-line and SDK versions to integrate SimpleOCR with their custom applications.


ABBYY FineReader

FineReader Professional is a highly accurate and easy to use OCR software that includes host of features including digital camera OCR, intelligent document layouts, image enhancement, barcode recognition and command line integration.  FineReader 9 is our pick for OCR software because its document layout retention will save you much time in reformatting documents you convert for editing


Affordable OCR software for business and home users.  ReadIRIS Pro provides a extremely accurate OCR recognition rate at a low cost, but still has some of the advanced features that higher priced professional OCR software includes.

Nuance OmniPage

OmniPage is widely considered the fastest, most accurate and fully featured OCR software.  OmniPage 17 Professional has a unique new feature that lets you convert any type of document to searchable PDF or Word. OmniPage does not have a downloadable demo. Nuance also does not provide free technical support after the first call.  For these reasons we recommend the ABBYY and IRIS products instead.

OmniPage is an Optical character recognition application available from Nuance Communications. Nuance Communications was acquired by ScanSoft, which also took over its name in October 2005.OmniPage converts images such as scanned paper documents, and PDF files, into file formats used by computer applications such as Microsoft Word, Excel, Adobe Acrobat, or HTML files.OmniPage is in competition with ExperVision (TypeReader), Readiris and ABBYY Fine Reader as well as free software such as GOCR and Tesseract.
In computer software, Tesseract is a free optical character recognition engine. It was originally developed as proprietary software at Hewlett-Packard between 1985 until 1995. After ten years without any development taking place, Hewlett Packard and UNLV released it as open source in 2005. Tesseract is currently developed by Google and released under the Apache License, Version 2.0.
JMagick is an open source Java interface of ImageMagick. It is implemented in the form of Java Native Interface (JNI) into the ImageMagick API. JMagick does not attempt to make the ImageMagick API object-oriented. It is merely a thin interface layer into the ImageMagick API. JMagick currently only implements a subset of ImageMagick APIs. Should you require unimplemented features in JMagick, please join the mailing list and make a request. JMagick has a LGPL (Lesser GNU Public License) license.
The award-winning TypeReader converts scanned documents into electronic files at speed of 8,000 pages per hour with maximum reliability. Desktop 7.0 offers added flexibility to handle color and grayscale images, with duplex scanning support to process documents in English, French, German, Italian, Portuguese, Spanish, Dutch, Danish, Swedish, Norwegian, Finnish, Polish, Hungarian and Polynesian. It employs an unparalleled recognition technology to support 2618 fonts. Users can choose to output to various formats including PDF, MS Word, Excel, Lotus 1-2-3, HTML, etc.
Tiff to Text is designed to perform Optical Character Recognition (OCR) in a batch process. The program utilizes the OCR engine from Nuance (Owners of OMNI Page – formally ScanSoft) that is included with Microsoft Office Document Imaging (MODI).

Posted in software, Technology | Tagged: , , , | 6 Comments »