Character recognition happens when raw data written by hand or mechanical means is converted into computer readable form. We derive data from several sources like writings or extracting part of book and scan to computerize. It has several rewards. It aids to form database and also reduces human effort .It provides accuracy which is compromised if human interferes. Scanning by hand held scanner and coding gives edge over data compression formats.
Optical character recognition has great advantages. It was Goldberg who led for technology for blind where audio files could be electronically stored in computer memory. Then there was the Octaphone where phonetics could be stored depending on pressure of each tone. Smartphones called for portability in OCR . The camera scanned documents are put into smartphone memory. Later these file could be added to desktop for further processing by OS. Today OCR is used in pattern matching and artificial intelligence.
The scanned image can be stored in two forms. The two form is matrix form or loop form. Matrix form gives the pixel details whereas loop form give the distance between two point in line vector. OCR can be utilized for many different purposes. Some of the off hand purposes are skewing, where image is distorted by pivot . Another way is texturing where shades are either added or deleted to give transformational edge. A use of OCR is for script detection. By comparing fonts a particular script is delineated . Sometimes segmentation where a group of attributes are either joined or disjoined gives a picture of handwriting.