Write a short note on each of the following : a. Optical Character Reader b. Barcode Reader c. Magnetic Ink Character Reader d. LCD projecter
Answers
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Explanation:
Literally, OCR stands for Optical Character Recognition. It is a widespread technology to recognise text inside images, such as scanned documents and photos. OCR technology is used to convert virtually any kind of images containing written text (typed, handwritten or printed) into machine-readable text data.
A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.
An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector. ... The combination of open and closed pixels can produce a wide range of colors and shades in the projected image.