8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 106
The calculation method of the equivalent ROI parameters
Equivalent Width: The equivalent width is the minimum width that can include all ROIs which are projected
on horizontal axis.
Equivalent Height: The equivalent height is the sum of all ROI projections on the vertical axis.
As shown in Figure 8-11, the equivalent width is width, and the equivalent height is the sum of height1,
height2, and height3.
ROI0
ROI3
ROI1
ROI2
width
h
e
ig
h
t1
h
e
ig
h
t2
h
e
ig
h
t3
Figure 8-11 Equivalent width and equivalent height
Multi-ROI camera can be switched between MultiROISendMode and SingleROISendMode, it can be
switched only in stop acquisition mode.
8.2.2.1. Single ROI mode and Configuration
In the demonstration program (GalaxyView.exe), if the user wants to use the single ROI mode, sets like
this: in the “image format control” option and” ROI output mode” menu, select “SingleROISendMode”. The
Multi-ROI camera works in single ROI mode by default when the camera is powered on.
In single ROI mode, the user can only set Region0. If the user wants to change the parameters of Region0,
in the “image format” option and pull-down menu of “Region selection”, select the “Region0”, then change
the image width, image height, horizontal offset and vertical offset.
8.2.2.2. Multi-ROI mode and Configuration
In the demonstration program (GalaxyView.exe), if the user wants to use the multi-ROI mode, sets like this:
in the “image format control” option and” ROI output model” menu, select “MultiROISendMode”.
In multi-ROI mode, the MER-134-94U3x camera supports up to 4 ROIs, Region0, Region1, Region2 and
Region3, which means one exposure can output 4 frame images. The height, width, horizontal offset and
vertical offset of the ROI can be modified.
