Datalogic Matrix 320 Product Reference Manual page 186

GLOSSARY
Dark Field Illumination
Lighting of surfaces at wide angles used to avoid direct reflection of the light into the
reader's lens. Typically this type of lighting is used in DPM solutions to enhance reflec-
tance of the uneven surface do to the symbol marking technique. It is also used with
very reflective surfaces.
Decode
To recognize a barcode symbology (e.g., Codabar, Code 128, Code 3 of 9, UPC/EAN, etc.)
and analyze the content of the barcode scanned.
Depth of Field
The difference between the minimum and the maximum distance of the object in the
field of view that appears to be in focus.
Diffused Illumination
Distributed soft lighting from a wide variety of angles used to eliminate shadows and
direct reflection effects from highly reflective surfaces.
Direct Part Mark (DPM)
A symbol marked on an object using specific techniques like dot peening, laser etching,
chemical etching, etc.
EEPROM
Electrically Erasable Programmable Read-Only Memory. An on-board non-volatile mem-
ory chip.
Element
The basic unit of data encoding in a 1D or 2D symbol. A single bar, space, cell, dot.
Exposure Time
For digital cameras based on image sensors equipped with an electronic shutter, it
defines the time during which the image will be exposed to the sensor to be acquired.
Flash
Non-volatile memory for storing application and configuration files.
Host
A computer that serves other terminals in a network, providing services such as net-
work control, database access, special programs, supervisory programs, or program-
ming languages.
Image Processing
Any form of information processing for which the input is an image and the output is for
instance a set of features of the image.
Image Resolution
The number of rows and columns of pixels in an image. The total number of pixels of an
image sensor.
Image Sensor
Device converting a visual image to an electric signal. It is usually an array of CCD
(Charge Coupled Devices) or CMOS (Complementary Metal Oxide Semiconductor) pixel
sensors.
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