Autoscanning; Normal Mode; Pattern Mode - Datalogic lynx bt Reference Manual

USING LYNX™ BT
The same range of values (–100% up to 100%, in steps of 1%) is available for
Contrast Adjustment. Positive values will increase the contrast, so that dark and
bright objects inside the image will be better distinguishable. Default value is 0%,
which means that no contrast adjustment is performed.
You can set the Image Color Depth by selecting 256 gray levels (default), 16 gray
levels, or 2 gray levels. Higher color depths yield larger image files. This option is
ignored if the JPEG format is selected,(256 gray levels only).
2.4

AUTOSCANNING

The Autoscan mode requires a rapid consumption of the Lynx™ BT
batteries.
NOTE
2.4.1

Normal Mode

Lynx™ BT provides an autoscan command, which when enabled, causes the reader
to scan continuously and to monitor the central zone of its reading area. In this way,
L ynx™ BT is ready to c
a uniform background.
The aiming system can be enabled to indicate the reading area of the potential code
to be captured. The illumination system can also be enabled when the ambient light
conditions are not sufficient to autodetect the potential code to be captured;
furthermore, the illumination system increases in intensity for an instant when
c apturing and decoding an image. A safety
BT from reading the same code repeatedly.
If the decoding is completed successfully, the reader starts monitoring the reading
a rea again. In case of decoding failure, Lynx™ BT keeps o
p otential code is present in the central zone of the reading area.
2.4.2

Pattern Mode

The Autoscan pattern mode is particularly advised when reading barcodes positioned
on a non-uniform background. In these cases Lynx™ BT may perceive some
elements of the background as barcodes and start the decoding. To avoid this
undesired effect, the Autoscan Pattern Code is placed in the Lynx™ BT reading area
which prevents decoding. Using this code as the background, code reading takes
place normally by presenting desired codes to b
Between each code read, the Pattern Code must be
The Pattern Code can be printed from Appendix C.
apture any image (containing a potential code) positioned on
time may be defined to prevent Lynx™
e read over the Pattern C
represented to Lynx™ BT.
2
n decoding until a
ode.
9