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OMR glossary
OMR glossary
Optical Answer (OMR Sheets)
Sheet
(1) OCR paper (optical character recognition paper)
Paper for data processing to optically read letters and symbols. It should
not be dusty, and it should be smooth, stiff, abrasion resistant, and
antistatic.
JIS X 9004 (printing specifications for optical character recognition)
(2) Bond paper
Paper made from pure chemical pulp. Used for printing and writing.
JIS P 3101 (printing paper) JIS P 3201 (writing paper)
(3) Paper weight
Paper is categorized by weight.
Column and Row
Marking frames are placed in rows, and timing marks in columns.
Dropout color
Refers to colors pre-printed or written on documents that people can see but it
don’t appear when read with an image scanner or other devices.
(1) Dropout color print darkness is controlled by the PCS value. There are two
ways to measure PCS, black backing and white backing, and you should
pay attention because they differ depending on the model.
(2) OCR sheets are generally used for printing character boxes using dropout
color inks and printing letters in clear areas.
(3) Dropout colors are chosen by spectral characteristics and PCS values
that are determined by scanner sensor, light source, and filter.
(4) Colors that can be used as dropout colors differ depending on the model,
but with some models, even regular ballpoint pen ink drops out and
cannot be used. In such cases, you need special OCR ballpoint pens
that are rarely available today. See table below for relationships between
wavelengths and colors.
1st
column
2nd
column
3rd
column
4th
column
5th
column
1st row
2nd row
3rd row
4th row
......
Timing mark
Mark frame
......
