Which is the best OCR software

What is OCR?

Optical character recognition, usually abbreviated to OCR, is the mechanical or electronic translation of images of handwritten, typewritten or printed text (usually captured by a scanner) into machine-editable text.

OCR is a field of research in pattern recognition, artificial intelligence and machine vision. Though academic research in the field continues, the focus on OCR has shifted to implementation of proven techniques. Optical character recognition (using optical techniques such as mirrors and lenses) and digital character recognition (using scanners and computer algorithms) were originally considered separate fields. Because very few applications survive that use true optical techniques, the OCR term has now been broadened to include digital image processing as well.

Early systems required training (the provision of known samples of each character) to read a specific font. "Intelligent" systems with a high degree of recognition accuracy for most fonts are now common. Some systems are even capable of reproducing formatted output that closely approximates the original scanned page including images, columns and other non-textual components.

i'll go with SimpleOCR as the name suggests. Very simple to use...
All the best! Keep posting such stuff!

About SimpleOCR :
SimpleOCR is a proprietary optical character recognition application developed originally by Cyril Cambien of France under the title WOCAR. It converts black and white scans or TIFF images to editable text files or Microsoft Word documents.

i will go with zonal Ocr software.

Zonal OCR is the process by which Optical Character Recognition (OCR) applications "read" specifically zoned text from a scanned image. Many batch document imaging applications allow the end user to identify and draw a "zone" on a sample image to be recognized. Once the zone has been established on the sample image, this zone will be applied to each image processed so that the data can be extracted from the image file and converted to a ASCII format.

Zonal OCR helps to automate data extraction from digital images. However, zonal OCR, and OCR in general, is not entirely accurate and review of the extracted data will be required.

OCRad :

Ocrad is an optical character recognition program, developed as part of the GNU Project. Based on a feature extraction method, it reads images in portable pixmap formats and produces text in byte (8-bit) or UTF-8 formats. Also included is a layout analyzer, able to separate the columns or blocks of text normally found on printed pages. Ocrad can be used as a stand-alone command-line application, or as a back-end to other programs. Like all GNU software it is free software, and is licensed under the GNU GPL.
Kooka, which is the KDE environment's default scanning application can use Ocrad as its OCR engine.