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Optical Mark Recognition

Optical Mark Recognition. Uses a device called an optical mark reader to detect marks made in certain places on specially printed forms. It is a fast input method where large amounts of data need to be inputted quickly. Question: What is the most common use of OMR in the UK?.

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Optical Mark Recognition

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  1. Optical Mark Recognition • Uses a device called an optical mark reader to detect marks made in certain places on specially printed forms. • It is a fast input method where large amounts of data need to be inputted quickly. • Question: What is the most common use of OMR in the UK?

  2. Magnetic Ink Character Recognition (MICR) • Uses an input device called a Magnetic Ink Character Reader to input characters that have been printed in special magnetic ink. • Question: How do banks use MICR?

  3. Magnetic Ink Character Recognition (MICR) • Numbers on bottom of cheque are printed in magnetic ink. • When cheques are paid in the cashier types in the amount by hand and then that cash amount is printed on the cheque in the special ink. • The cheque is then sent to a clearing house where the cheque can be processed automatically.

  4. Optical Character Recognition • The use of an ordinary scanner and software to convert text into a format that can be edited by word processing software. • Text must be written very clearly. • OCR used for reading postcodes when mail is automatically sorted. • The difference between OCR and OMR is that OCR depends on the shape of the marks and OMR on the position of them.

  5. Bar Codes • The lines represent a number. • Most products in shops have them and represent a code number. • Parts of the number can be used to look up information such as price, size, manufacturer. • Libraries also now use bar codes.

  6. Magnetic Stripe Readers • Thin band of magnetic tape which identifies information through an identity number on the back. • To read the card is swipes through a magnetic stripe reader.

  7. Sensors • Used to detect physical quantities outside a computer such as temperature, pressure and light. • Digital data is captured through an analogue to digital converter which is connected between the sensors and the computer.

  8. Data Logging • Automatically collects data over a period of time without human intervention. • Used when data needs to be collected from inhospitable regions. E.g. mountain tops. • Data can be transferred through communications equipment like satellites and telephone lines.

  9. Data Logging • Advantages of data logging to gather data over manual methods are: • Readings are much more accurate. • No human intervention when logging data. • Work is time consuming and repetitive – so we do not have to do it. • Applications • Scientific Data • Monitoring hospital patients • Weather data. • Monitoring air quality.

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