Optical Mark reader ( OCR)

An optical mark Reader special marks such as squares or bubbles are prepared on examination answer sheets or questionnaires. The user fill in these squares or bubbles with soft pencil or ink to indicate their choice. These marks are detected by an optical mark Reader.
The OMR device has a high-intensity light that is directed as a beam at the sheet of paper being fed through it. The beam scans the sheet and detects number and location of the pencil markes. The data is then converted into electric signal for the computer.