RJS Inspector 5000 Operator's Manual page 126

Appendix M
Segment
Refers to the left and right grouping of modules or
elements into segments to designate parity for
checking validity of a scan.
Self-checking
A bar code or symbol that uses a checking algorithm
that can be applied to each character, to guard
against undetected errors. (Non-self-checked codes
may use a check digit or other redundancy in addition
to the data message).
Show-through
The generally undesirable property of a substrate that
allows underlying markings of materials to affect
reflectance.
Space
The element of a bar code symbol whose reflectance
is greater than the global threshold. A Space is the
light reflective element. (As opposed to a bar which is
the dark reflective element.)
Space Reflectance (Rs)
The largest reflectance value in a space or quiet zone.
Specular Reflection
Reflection of light from a surface at an angle equal
and opposite to the angle of incidence.
Start and Stop Characters
Characters typically used at the beginning and end of
each bar code symbol.
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Operator's Guide
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