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V530-R160
Operation Manual
SECTIO
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Gl
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SECTION 10
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SECTION 10
Appendix
Glossary
This glossary focuses on terms related to QRCodes and DataMatrix codes which are matrix-type 2-
dimensional codes. There may be some parts of this glossary that do not apply to other types of 2-
dimensional codes.
Glossary
Explanation
DataMatrix
DataMatrix codes were developed by I.D. Matrix, and are used extensively in the
semiconductor and electronics industries. DataMatrix codes have a relatively large
data capacity for their size. There are several different types of DataMatrix, differ-
entiated by their error correction method. The ECC200 is the most commonly used
type.
QRCode
The “Quick Response Code” type is a 2-dimensional code that was developed in
Japan. High-speed reading is possible with QRCodes, but the code size is quite
large compared to other 2-dimensional codes.
Error correction
This term is used to describe the function which detects and corrects errors using a
special mathematical technique (commonly known as the “Read-Solomon”
method). Using this function, reading is possible, to a certain extent, for codes with
poor printing quality or that are damaged. There are, however, limits on the extent
to which correction is possible, and reading may not be possible for codes if the
damage is extensive. There are 2-dimensional codes for which the error correction
level can be selected.
(For example: With QRCodes, error correction levels of 7%, 15%, 25%, or 30% are
available.)
Pixel
Pixels are the points that make up images. The monitor screen is 512 pixels high
and 484 pixels wide which means that the screen contains approximately 250,000
pixels.
1 pixel
512 pixels
484 pixels
