Specifications

44
Note that the area of the aimer is a reference. It ca be varied by factors such as distance between
the bar code and the terminal or angle of emitting the aimer.
The functions of the Imager Library relevant to the “Decode Window function” are as follows.
IMGSetDecodeWindow
: Sets up decode window area.
IMGGetDecodeWindow
: Retrieves decode window area.
• Contrast-Reverse Symbols function
This is function that scan special symbols which is printed out white color in black color
background (Reverse printed Symbols).
When you specified Contrast-Reverse Symbols function, such kind of special symbol will be
available to scan.
Table 2.32
Setting Description Remarks
Normal Available to scan normal symbol (printed black color in white color
background.)
Default
Contrast-Reverse Available to scan Contrast-Reverse symbol (printed white color in
black color background.)
Both normal and
Contrast-Reverse
Available to scan both normal and Contrast-Reverse symbol.
But scanning performance will be decreased.
This is function that scan special symbols which is printed out white color in black color
background (Reverse printed Symbols).
Please take care when you set Contrast-Reverse mode, normal symbol will not be scanned.
About QR code, DataMatrix code and Aztec code is not related with this function setting.
(These type of symbol are available to scan at both mode.)
The functions of the Imager Library relevant to the “Decode Reversed Symbol function” are as
follows.
IMGSetDecodeReverse
: Sets up decode mode in reversed colors.
IMGGetDecodeReverse
: Retrieves the status of decode mode in reversed colors.