How are OMR devices used for recognising the characters in the document to be scanned? Explain briefly the basic function of an MICR device. How does bar code reader help in recognising the characters...

How are OMR devices used for recognising the characters in the document to be scanned? Explain briefly the basic function of an MICR device. How does bar code reader help in recognising the characters on the labels? Defi ne digital camera. Explain the basic features of a digital camera. Briefly explain the different types of digital cameras.