User guide

Quantity One User Guide
13-10
The profile is generated by calculating the average intensity of the pixels in
every horizontal scan line along the defined lane.
The profile shows the data objects in the image, represented by the intensity
peaks in the profile, as well as the background noise in the image, represented
by the region underneath the intensity peaks. The number of pixels used in
this calculation depends on the lane width (see previous section).
To close the lane profile window, click on Hide Overlays on the main toolbar.
13.2 Lane-Based Background Subtraction
After defining your lanes, we strongly recommend that you perform lane-
based background subtraction. This is the best method for removing
background noise from your lanes.
Select Lane Background from the Lane menu or toolbar. When you click on a
lane, a lane profile will be displayed and the Lane Background dialog box will
open.
Fig. 13-10. Lane Background dialog box.
The following information can be specified in the dialog.