Optical mark recognition
Encyclopedia
Optical Mark Recognition (also called Optical Mark Reading and OMR) is the process of capturing human-marked data from document forms
Form (document)
A form is a document with spaces in which to write or select, for a series of documents with similar contents. The documents usually have the printed parts in common, possibly except for a serial number...

 such as surveys and tests.

OMR background

Many traditional OMR (Optical Mark Recognition) devices work with a dedicated scanner
Scanner
Scanner may refer to:* WikiScanner, a tool that provides a searchable database of anonymous Wikipedia edits* A personality type described by self-help author Barbara Sher-Technology:* Scanner , for searching for and receiving radio broadcasts...

 device that shines a beam of light onto the form paper. The contrasting reflectivity
Reflectivity
In optics and photometry, reflectivity is the fraction of incident radiation reflected by a surface. In general it must be treated as a directional property that is a function of the reflected direction, the incident direction, and the incident wavelength...

 at predetermined positions on a page is then utilized to detect the marked areas because they reflect less light than the blank areas of the paper.

Some OMR devices use forms which are preprinted onto 'transoptic' paper and measure the amount of light which passes through the paper, thus a mark on either side of the paper will reduce the amount of light passing through the paper.

In contrast to the dedicated OMR device, desktop OMR software allows a user to create their own forms in a word processor and print them on a laser printer. The OMR software then works with a common desktop image scanner with a document feeder to process the forms once filled out.

OMR is generally distinguished from optical character recognition
Optical character recognition
Optical character recognition, usually abbreviated to OCR, is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine-encoded text. It is widely used to convert books and documents into electronic files, to computerize a record-keeping...

 (OCR) by the fact that a complicated pattern recognition
Pattern recognition
In machine learning, pattern recognition is the assignment of some sort of output value to a given input value , according to some specific algorithm. An example of pattern recognition is classification, which attempts to assign each input value to one of a given set of classes...

 engine is not required. That is, the marks are constructed in such a way that there is little chance of not reading the marks correctly. This does require the image to have high contrast and an easily-recognizable or irrelevant shape. A related field to OMR and OCR is the recognition of barcodes such as the UPC bar code found on product packaging.

One of the most familiar applications of optical mark recognition is the use of #2 (HB in Europe) pencil bubble optical answer sheet
Optical answer sheet
An optical answer sheet is a special type of form used in multiple choice question examinations. Optical mark recognition is used to detect answers...

s in multiple choice question examinations. Students mark their answers, or other personal information, by darkening circles marked on a pre-printed sheet. Afterwards the sheet is automatically graded by a scanning machine. In most European countries, a horizontal or vertical 'tick' in a rectangular 'lozenge' is the most commonly used type of OMR form, the most familiar application being the UK National lottery form. Lozenge marks are a later technology and have the advantage of being easier to mark and easier to erase. The large 'bubble' marks are legacy technology from the very early OMR machines that were so insensitive a large mark was required for reliability. In most Asian countries, a special marker is used to fill in an optical answer sheet
Optical answer sheet
An optical answer sheet is a special type of form used in multiple choice question examinations. Optical mark recognition is used to detect answers...

. Students, likewise mark answers or other information via darkening circles marked on a pre-printed sheet. Then the sheet is automatically graded by a scanning machine.

Many of today's OMR applications involve people filling in specialized forms. These forms are optimized for computer scanning, with careful registration in the printing, and careful design so that ambiguity is reduced to the minimum possible. Due to its extremely low error rate, low cost and ease-of-use, OMR is a popular method of tallying votes.

OMR software

OMR Software is a computer software application that makes OMR possible on a desktop computer by using an Image scanner
Image scanner
In computing, an image scanner—often abbreviated to just scanner—is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Common examples found in offices are variations of the desktop scanner where the document is placed on a glass...

 to process surveys, tests, attendance sheets, checklists, and other plain-paper forms printed on a laser printer.

The need for OMR software originated because early Optical Mark Recognition systems were designed to use dedicated scanners and special pre-printed forms with drop-out colors and registration marks. Such forms typically cost USD $0.10 to $0.19 a page. In contrast, OMR Software users design their own mark-sense forms with a word processor or built-in form editor and print them locally on a laser printer saving themselves thousands of dollars on large numbers of forms.

One of the first OMR software packages available was Remark Office OMR, made by Gravic, Inc. (originally named Principia Products, Inc.). Remark Office OMR 1.0 was released in 1991.

Open Source

Some OMR software products are developed and distributed under open source licenses.
  • queXF which can be used alone or in conjunction with surveys exported from LimeSurvey
    LimeSurvey
    LimeSurvey is an open source online survey application written in PHP based on a MySQL, PostgreSQL or MSSQLdatabase, distributed under the GNU General Public License...

    .
  • Udai OMR
  • Shared Questionnaire System(SQS)
  • Auto Multiple Choice for class tests, with LaTeX formatting.
  • Moodle
    Moodle
    Moodle is a free source e-learning software platform, also known as a Course Management System, Learning Management System, or Virtual Learning Environment...

     also has an extension, Quiz OMR, which provides online support for offline quizzes conducted on OMR sheets.
  • TCExam supports offline testing conducted on OMR sheets.

History

Optical mark recognition (OMR) is the scanning of paper to detect the presence or absence of a mark in a predetermined position. Optical mark recognition has evolved from several other technologies. In the early 19th century and 20th century patents were given for machines that would aid the blind.

OMR is now used as an input device for data entry. Two early forms of OMR are paper tape and punch cards which use actual holes punched into the medium instead of pencil filled circles on the medium. Paper tape was used as early as 1857 as an input device for telegraph. Punch cards were created in 1890 and were used as input devices for computers. The use of punch cards declined greatly in the early 1970s with the introduction of personal computers. With modern OMR, where the presence of a pencil filled in bubble is recognized, the recognition is done via an optical scanner.

The first mark sense
Mark sense
Electrographic is a term used for punched card and page scanning technology that allowed cards or pages marked with a pencil to be processed or converted into punched cards. That technology was sold by IBM, its developer, under the term mark sense...

 scanner was the IBM 805 Test Scoring Machine
IBM 805 Test Scoring Machine
The IBM 805 Test Scoring Machine was a machine sold by IBM beginning in 1937. The device scored answer sheets marked with special "mark sense" pencils. The machine was developed from a prototype developed by Reynold Johnson, a school teacher who later became an IBM engineer...

; this read marks by sensing the electrical conductivity of graphite pencil lead using pairs of wire brushes that scanned the page. In the 1930s, Richard Warren at IBM
IBM
International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

 experimented with optical mark sense systems for test scoring, as documented in US Patents 2,150,256 (filed in 1932, granted in 1939) and 2,010,653 (filed in 1933, granted in 1935). The first successful optical mark-sense scanner was developed by Everett Franklin Lindquist
Everett Franklin Lindquist
Everett Franklin Lindquist was a professor of education at the University of Iowa. He is best known as the creator of the ACT and other standardized tests. His contributions to the field of educational testing are significant and still evident today.-Career:Lindquist joined the University of Iowa...

 as documented in US Patent 3,050,248 (filed in 1955, granted in 1962). Lindquist had developed numerous standardized educational tests, and needed a better test scoring machine than the then-standard IBM 805. The rights to Lindquist's patents were held by the Measurement Research Center until 1968, when the University of Iowa
University of Iowa
The University of Iowa is a public state-supported research university located in Iowa City, Iowa, United States. It is the oldest public university in the state. The university is organized into eleven colleges granting undergraduate, graduate, and professional degrees...

 sold the operation to Westinghouse Corporation.

During the same period, IBM
IBM
International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

 also developed a successful optical mark-sense test-scoring machine, as documented in US Patent 2,944,734 (filed in 1957, granted in 1960). IBM commercialized this as the IBM 1230 Optical mark scoring reader in 1962. This and a variety of related machines allowed IBM to migrate a wide variety of applications developed for its mark sense
Mark sense
Electrographic is a term used for punched card and page scanning technology that allowed cards or pages marked with a pencil to be processed or converted into punched cards. That technology was sold by IBM, its developer, under the term mark sense...

 machines to the new optical technology. These applications included a variety of inventory management and trouble reporting forms, most of which had the dimensions of a standard punched card
Punched card
A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions...

.

While the other players in the educational testing arena focused on selling scanning services, Scantron
Scantron
Scantron is an American company based in Eagan, Minnesota, that manufactures and sells machine-readable papers on which students mark answers to academic multiple-choice test questions. To analyze those answers, the machines use image-based data collection software and scanners...

 Corporation, founded in 1972, had a different model; it would distribute inexpensive scanners to schools and make profits from selling the test forms. As a result, many people came to think of all mark-sense forms (whether optically sensed or not) as scantron forms. Scantron operates as a subsidiary of M&F Worldwide(MFW) and provides testing and assessment systems and services and data collection and analysis services to educational institutions, businesses and government.

Westinghouse Learning Corporation was acquired by National Computer Systems in 1983. In 2000, Pearson Education
Pearson Education
Pearson Education is an international educational publishing and technology company providing textbooks and other educational material, such as multimedia learning tools...

 acquired NCS; the OMR technology formed the core of Pearson's Data Management group. In February 2008, Pearson sold this group to M&F Worldwide, and it is now part of the Scantron brand.

OMR has been used in many situations as mentioned below. The use of OMR in inventory systems was a transition between punch cards and bar codes and is not used as much for this purpose. OMR is still used extensively for surveys and testing though.

General

The use of OMR is not limited to schools or data collection agencies; many businesses and health care agencies use OMR to streamline their data input processes and reduce input error. OMR, OCR, and ICR technologies all provide a means of data collection from paper forms. OMR may also be done using an OMR (discrete read head) scanner or an imaging scanner.

Applications

There are many other applications for OMR, for example:
  • In the process of institutional research
    Institutional research
    Institutional research is a broad category of work done at schools, colleges and universities to inform campus decision-making and planning in areas such as admissions, financial aid, curriculum, enrollment management, staffing, student life, finance, facilities, athletics, and alumni...

  • Community surveys
  • Consumer surveys
  • Tests/assessments
  • Evaluations/Feedback
  • Data compilation
  • Product evaluation
  • Time sheets/Inventory counts
  • Membership subscription forms
  • Lotteries/Voting
  • Geocoding (e.g. postal code
    Postal code
    A postal code is a series of letters and/or digits appended to a postal address for the purpose of sorting mail. Once postal codes were introduced, other applications became possible.In February 2005, 117 of the 190 member countries of the Universal Postal Union had postal code systems...

    s)
  • mortgage loan
    Mortgage loan
    A mortgage loan is a loan secured by real property through the use of a mortgage note which evidences the existence of the loan and the encumbrance of that realty through the granting of a mortgage which secures the loan...

    , Banking and Insurance Applications

Fields

OMR has different fields to provide the format the questioner desires. These fields include:
  • Multiple, where there are several options but only one is chosen, ABCDE, 12345, completely disagree, disagree, indifferent, agree, completely agree, etc.
  • Grid, the bubbles or lines are set up in a grid format for the user to fill in a phone number, name, ID number and so on.
  • Add, total the answers to a single value
  • Boolean, answering yes or no to all that apply
  • Binary, answering yes or no to only one

Capabilities/requirements

In the past and presently, some OMR systems require special paper, special ink and a special input reader (Bergeron, 1998). This restricts the types of questions that can be asked and does not allow for much variability when the form is being input. Progress in OMR now allows users to create and print their own forms and use a scanner (preferably with a document feeder) to read the information (Bergeron, 1998). The user is able to arrange questions in a format that suits their needs while still being able to easily input the data (LoPresti, 1996). OMR systems approach one hundred percent accuracy and only take .005 seconds on average to recognize marks (Bergeron, 1998). Users can use squares, circles, ellipses and hexagons for the mark zone. The software can then be set to recognize filled in bubbles, x’s or check marks.

OMR can also be used for personal use. There are all-in-one printers in the market that will print the photos the user selects by filling in the bubbles for size and paper selection on an index sheet that has been printed. Once the sheet has been filled in, the individual places the sheet on the scanner to be scanned and the printer will print the photos according to the marks that were indicated (M. Meek, personal communication, February 11, 2006).

Disadvantages

There are also some disadvantages and limitations to OMR. If the user wants to gather large amounts of text, then OMR complicates the data collection (Green, 2000). There is also the possibility of missing data in the scanning process, and incorrectly or unnumbered pages can lead to their being scanned in the wrong order. Also, unless safeguards are in place, a page could be rescanned providing duplicate data and skewing the data (Bergeron, 1998).

For the most part OMR provides a fast, accurate way to collect and input data; however, it is not suited for everyone’s needs.

As a result of the widespread adoption and ease of use of OMR, standardized examinations consist primarily of multiple-choice questions, changing the nature of what is being tested.

See also

  • Mark sense
    Mark sense
    Electrographic is a term used for punched card and page scanning technology that allowed cards or pages marked with a pencil to be processed or converted into punched cards. That technology was sold by IBM, its developer, under the term mark sense...

  • Clock mark
  • Optical character recognition
    Optical character recognition
    Optical character recognition, usually abbreviated to OCR, is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine-encoded text. It is widely used to convert books and documents into electronic files, to computerize a record-keeping...

  • Electronic Data Capture
    Electronic Data Capture
    An Electronic Data Capture system is a computerized system designedfor the collection of clinical data in electronic format for use mainly in human clinical trials.Typically, EDC systems provide:* a graphical user interface component for data entry...

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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