OMR SHEET
OPTICAL MARK READER SHEET (OMR SHEET) is a technically designed sheet which is used in objective type examinations or any other data which has multiple choice options to be filled by the applicant. It is designed with circles/ovals and rectangles. The circles/ovals are generally in Pink/Magenta and Orange Colour. The rectangles are in black colour.
The OMR sheets are scanned through specific OMR Scanners which are
provided by various companies like Scantron, DRS, Sekonic, etc. There are some
image or OCR scanners which also scan these OMR Sheet with images of the sheet.
But the main issue is how to capture data from image scanners? For that there
are softwares like eXtractPro which converts OCR data to OMR but the time taken
to convert data takes lot of time so it is advisable to scan the OMR Sheets
with OMR scanners only. These OMR scanners are designed technically with header
to read the responses filled in OMR sheets. The headers can be ink or pencil
head with accuracy of OMR Sheets. The ink head has facility to scan responses
filled with pencil and pen both whereas, pencil headers have facility to scan
responses filled with pencil only. The
accuracy is 99.99% on the OMR Scanners.
The picking of response depends on the threshold value i.e. the
intensity of filling the responses in OMR Sheet. If a person just put a dot(.) or
a tick (a) on
the sheet the response may not be picked. The bubbles should be dark and filled
so that the circles/ovals in the completely. If a person fills more than two
responses in one field the data will be read as * (multiple responses).
Design of OMR
Sheet - There are specific dimensions of designing OMR
Sheet with 0.05 mm precision on scale. If the dimensions are not up to the
precision scale the accuracy of OMR sheet may vary. So it is advisable that the
sheet should be designed and printed with perfection and the cutting of the
sheet should be perfect as shown here.
Software to
design OMR Sheet – Architects and builders use Autocad Software
for designing designs and architecture, the same software, Autocad is used in
designed OMR Sheet which has full and accurate dimensions. Corel Draw is
designing software which is used after final designing is done in Autocad to
get the better look with colour and print to file features of OMR Sheet.
1. Single Part – Sheets are printed on
105 gsm to 120 gsm paper on A4/Legal sheet.
2.
Double
Part (Carbonless) – Two Sheets are printed one 105 gsm paper and one on 60-70
gsm paper on A4 sheet . The bottom of first sheet and the top of second sheet
is chemically treated so that the impression of the first sheet should come on
the second sheet.
3. Three Part (Carbonless) – Three
Sheets are printed one 105 gsm paper and other two on 60-70 gsm paper on A4
sheet . The bottom of first sheet, the top and bottom of second sheet and the
top of third sheet is chemically treated so that the impression of the first
sheet should come on the second and third sheets.
First Copy
Security Features in OMR Sheet
1.
Bar
Code – Unique Code is printed on the sheets so that no tampering of sheets can
be done
2.
UV
Printing – Watermark or any other text or logo printed on the sheet which
cannot be seen by the naked eye.
3.
Litho
Code - Unique Code is printed on the sheets in the form of binary coding so
that no tampering of sheets can be done.
How is Scanning done and how can get the result/output of OMR sheets – Scanning is
done by OMR scanners specifically designed for OMR Sheets. The reading of data
is done through the header fitted in the OMR scanners to read the marks filled
by pen/pencil. Only Blue/Black Ball Pont Pen should be used to get the proper
and accurate responses if filled by correct method. The sheets are kept in a
bunch of 200-250 in the input hopper of the scanner and then scanned through
Scan tools software or any other software with the facility of printing of scan
numbers on the sheet to identify the sheet for future reference.
The sheets are scanned in .dat format and then
is converted into .dbf format and then through programming further processing,
result or output are done.
What measures should to be taken to fill OMR Sheet
a)
There
are timing marks or skunk marks on the side and four IDs on the top and bottom
of OMR Sheet through which data is captured through OMR Scanners. These should
not be tampered at any cost otherwise sheet while scanning can be rejected.
b)
The
barcodes or litho codes should not be tampered at any cost because that may
give error while scanning of barcodes and litho codes.
c)
The
sheets before and after the examination should be packed nicely in tamper proof
poly packs or envelopes so that they are not torn or mutilated to get error
free result or output.
INSTRUCTIONS TO
FILL OMR SHEET
1. Use Black or Blue Ball Point Pen only. Please avoid using gel pens, fountain pens and any other colour pens.
2. Unless specified don’t use pencils and if asked then only use HB Pencil.
3. Darken the bubbles completely. A tick mark, a dot of half filled bubbles will not be read and scanned.
4. Never use white fluid or cutting for rectifying errors as they may disrupt the scanning and evaluation process.
5. Do not fold the OMR Sheet.
6. Do not any stay marks on the OMR sheet.
7. Multiple marking are invalid they may result in rejection.
Where are these sheets used.
(a) In Competitive Exams, generally all written examinations whether held for recruitment or for any Entrance Examination.
(b) For taking surveys some organisation used OMR Sheet.
(c) For Application Forms, Attendance Sheets.
(d) University Cover Page are mainly of OMR Sheet which has three to four parts where candidate write their basic details in one part, Paper Checker in other part and remaining parts are attached with the Answer Booklet with security features.
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