Q.Explain MICR,OCR and OMR.
Ans.:-MICR:-It stands for magnetic ink character recognition/reader.It is a character recognition system that uses special ink and characters.When a document that contains this ink needs to be read,it passes through a machine,which magnetizes the ink and then translates the magnetic information into characters.It provides a secure,high speed method of scanning and processing information.This technology is used for processing large volume of data. MICR technology is used by banks for faster processing of large volume of cheques.It speeds up data input for the bank because cheques can be directly fed into the input device as it also ensures accuracy of data entry.The most commonly used character set by MICR devices are known as E13B font which consists of the numerals 0 to 9 and four special characters.

OCR:-It stands for optical character recognition/reader.It is the recognition of printed or written text characters by a computer.This involves photoscanning of the text character-by-character,analysis of the scanned-in image and then translation of the character image into characters codes such as ASCII commonly used in data processing.It is widely uesd as a form of information entry from printed paper data records,whether passport documents,invoices,bank statements,computerised receipts,buisness cards,mail,printouts of static-data or any suitable documentation. It is a common method of digitising printed texts so that they can be electronically edited, searched,stored more compactly,displayed on-line and used in machine processes such as cognitive computing,machine translation,text-to-text speech,key data and text mining.OCR is a field of research in pattern recognition,artificial intelligence and computer vision.

OMR:-It stands for optical mark recognition/reader.OMR is the scanning of paper to detect the presence or absence of a mark in a predetermined position.Nowadays,it is used as an input device for source data entry purpose.Many traditional OMR devices work with a dedicated scanner device that shines a beam of light onto the form paper.The contrasting reflectivity at predetermined positions on a page is then used to detect these marked areas because they reflect less light than the blank areas of the paper. Universities and colleges often use OMR for the evaluation of OMR sheets for competitive exams. The use of OMR is not limited to schools or data collection agencies.Many buisnesses and health care agencies use OMR to streamline their data input processes and reduce input error.