Auto Focus Multi Code Reader V430-series User’s Manual (Z392) A-31
Appendices
Progressive Scan — A non-interlaced scan that doubles the number of visible picture
lines per field by displaying all picture lines at once.
Protocol — The rules for communication between devices, providing a means to control
the orderly flow of information between linked devices.
Random Access Memory (RAM) — A data storage system used in computers, composed
of integrated circuits that allow access to stored data in any sequence without movement
of physical parts.
Read Cycle — A programmed period of time or condition during which a reader will accept
symbol input.
Read-Only Memory (ROM) — A data storage medium used in computers and other
electronics, primarily used to distribute Firmware.
Real-Time Processing — In machine vision, the ability of a system to perform a complete
analysis and take action on one part before the next one arrives for inspection.
Region
— Area of an image. Also called a region of interest for image processing operations.
Saturation — The degree to which a color is free of white. One of the three properties of
color perception, along with hue and value.
Scattering — Redirection of light reflecting off a surface or through an object.
Skew — Rotation of a linear or 2D symbol around an axis parallel to the symbol height on
the substrate.
Substrate — The surface upon which a linear or 2D symbol is printed, stamped, or etched.
Symbol Transitions — The transition of bars and spaces on a symbol, used to detect the
presence of a symbol on an object.
Symbology — A symbol type, such as Code 39 or Code 128, with special rules to define
the widths and positions of bars and spaces to represent specific numeric or alphanumeric
information.
Tilt — Rotation of a linear or 2D symbol around an axis perpendicular to the substrate.
Trigger — A signal, transition, or character string that initiates a read cycle.
Very Large-Scale Integration (VLSI)
— The creation of integrated circuits by combining
thousands
of transistor-based circuits on a single chip.
Watchdog Timer — A security device that detects system crashes and attempts to reset
the imager.
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