Microscan QX Hawk User Manual page 75

Image Dimensions
This feature defines how the image dimension parameters are implemented.
Window of Interest (WOI)
In this mode the database image dimension parameters are Camera Settings and dictate
the size of the image to be captured.
Region of Interest (ROI)
In this mode the database image dimension parameters are Image Processing\Decode
Settings and specify the region or area of the captured image to be processed. The ROI
coordinate data is based on the full scale image size. The WOI of the captured image will
be configured to cover all the active database ROI settings. In the following example there
are three active database setting, with different ROI configurations. Their coordinates are
based at point 0,0 of the full scale image (SXGA = 1280 x 1024 or VGA = 640 X 480). The
image WOI is not configurable, it is automatically setup by the database, based on the ROI
settings.
This feature is intended to be used in conjunction with the "Image Process Looping" feature,
to allow processing different regions of a captured image with different Image Processing
Decode Settings. In addition, if combined with "Output Filtering" the user can order the
output of decoded symbols in a captured image frame by their location in the Field of View.
Multiple Symbols with Same Symbol Data Operation
ROI can be used to decode more than one of the same symbols and treat them as different
symbols. Multi Symbol Operation will work within the following rules:
• Multiple symbols of same symbol data can only be handled by using ROI mode. This
can only be done between different ROI IP Region settings.
• ROI IP Region settings within the database must be sequential (Not Interlaced) in order
to correctly know when a new region has been tried. If Database slot 2 and 3 are
swapped, the imager would then treat them as 4 separate ROI regions. This would
result in 4 different symbols with GDR of 1 instead of 2 different symbols with GDR
count of 2.
• ROI Regions will count the same symbol in the same region as additional decodes, but
only spanning multiple frames. Each decode of same symbol with same ROI will add to
the GDR count with additional frames.
• Multiple symbols can be within each ROI Region but cannot identify multiple Same
Symbols. If same symbol is in a ROI twice per frame then it will be counted as 1 decode
or 1 more GDR count, the second will be ignored.
• Filtering can only be done with database # because all other data is same.
QX Hawk Industrial Imager User's Manual
Setup
4-23