Omron V530-R150E-2 Operation Manual page 228

Glossary
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. Adjust the field of vision so that the number of pixels per cell is at least 5. The
number of pixels per cell can be measured in Image Analysis/Measure Length .
p.149
484
pixels
Maximum Data Capacity
The maximum amount of data that can be stored in a code varies with the code size.
In other words, if there is a large amount of data to be stored, then the code size
must also be large. The maximum data capacity will also vary with the type of char-
acters used. With QR Codes and Data Matrix codes, the numeric capacity (num-
bers only) is larger than the alpha numeric capacity (numbers and letters).
Right and Left Reversal
This is the term used to describe reading 2-dimensional codes marked on a trans-
parent material from the reverse side.
Black and White Reversal
Usually, in images of 2-dimensional codes, the code itself is black and the back-
ground is white. Sometimes, however, due to the material of the reading object and
the kind of lighting used, the code will appear white in the image obtained. This phe-
nomenon is called "black and white reversal."
Cell
These squares are the units that make up matrix-type 2-dimensional codes.
Whether these cells are black or white determines the information carried by the
code.
216
512 pixels
Appendix D
1 pixel