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Optical Character Recognition

Optical Character Recognition

Optical character recognition (OCR) is the mechanical or electronic conversion of images of typewritten or printed text into machine-encoded text. It is widely used as a form of data entry from printed paper data records, whether passport documents, invoices, bank statements, computerized receipts, business cards, mail, printouts of static-data, or any suitable documentation. It is a common method of digitizing printed texts so that it can be electronically edited, searched, stored more compactly, displayed on-line, and used in machine processes such as machine translation, text-to-speech, key data and text mining. OCR is a field of research in pattern recognition, artificial intelligence and computer vision.

Early versions needed to be trained with images of each character, and worked on one font at a time. Advanced systems that have a high degree of recognition accuracy for most fonts are now common. Some systems are capable of reproducing formatted output that closely approximates the original page including images, columns, and other non-textual components.

Properties

Range	2440–245F
Characters	32

List of Characters

Table of Characters

2400–243F Control Pictures 2460–24FF Enclosed Alphanumerics

0: Basic Multilingual Plane

1: Supplementary Multilingual Plane

2: Supplementary Ideographic Plane

3: Tertiary Ideographic Plane

4-13: Not Used

14: Supplementary Special-purpose Plane

15: Supplementary Private Use Area Plane – A

16: Supplementary Private Use Area Plane – B