Panasonic IMAGECHECKER PV230 Manual page 64

■Data Matrix
■Data matrix structure
■QR Code
■QR Code structure
The required minimum number of pixels for each element or module of a code may increase depending on
the printing condition of the code. Also, note codes that are less than the minimum number of pixels may not
be read.
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Cell
L-shaped alignment
pattern
L-shaped alignment
pattern
• The position of Data Matrix code is identified
using the L-shaped alignment pattern and the
alignment pattern with a clock which bright
cells and cark cells are alternately arrayed.
• Set the view range to make one module to be
4x4 pixels or more.
• One module of quiet zone is necessary
around the code to recognize it.
Cell
Position detection
patter
Alignment pattern
Timing pattern
• Set the view range to make one module to be
3x3 pixels or more.
• Four modules of quiet zones are necessary
around the code to recognize it.
Square or dot which is
the minimum unit that
composes Data Matrix
code.
Mark to detect the
position of a code.
Pattern where bright
cells and dark cells
are alternately
arrayed linearly.
Square or dot which is
the minimum unit that
composes QR code.
Mark to detect the
position of a code. It is
located in three
corners of the code.
Pattern to correct the
distortion of a captured
pattern. (This pattern is
arrayed in QR code at
regular intervals and
corrects distortion.)
Pattern where bright
cells and dark cells are
alternately arrayed
linearly.