An OMR (Optical Mark Recognition) sheet is a special type of form used in multiple-choice question examinations. It contains bubbles or circles that candidates fill in to mark their answers. The sheet is then graded by a scanning machine, which uses OMR to detect the answers. OMR sheets are used in various applications such as examinations, surveys, elections, and feedback forms. OMR software is used to capture data from these sheets, and it is also possible to create OMR sheets in any format based on specific requirements. The OMR sheet is scanned using an OMR device with a scanner that focuses a light beam on the form paper and identifies areas of minimal light transmission, i.e., marked areas reflecting less light than blank zones
. OMR sheets have specific dimensions and a technical format to ensure accurate detection of marked answer bubbles. It is essential for candidates to fill in the bubbles or put a checkmark accurately, as small errors can lead to rejections or incorrect results. OMR sheets are designed with index points on all four corners, which are used by OMR software to properly locate the bubbles and generate accurate results. Candidates are instructed not to write anything in certain areas of the OMR sheet, and they are advised to use black or blue ballpoint pens for filling the sheets
. In summary, an OMR sheet is a pre-printed paper security document used for various applications such as examinations, surveys, and elections. It is scanned using OMR devices and software to detect and capture data from marked bubbles or checkmarks, providing a fast and accurate way to process large volumes of responses
