Milestone LPR 1.0 - Manual (Page 16)

Milestone XProtect
®
LPR 1.0 Administrator's Manual
www.milestonesys.com 16 LPR servers, sources and lists
You should avoided completely including irrelevant moving objects such as people, trees, or traffic in
the recognition area. Eliminating irrelevant elements and areas in the recognition area is very
important to systems performance. If to many irrelevant items are included in the recognition area, this
results in "noise" and too many resources spent on analyzing and detecting these irrelevant items
instead of license plates.
When selecting an area of recognition, you have the following options:

No area: The entire image is used for LPR. Note that you do not have to select a recognition
area, but it is recommended to do so.

Simple area: The simple recognition area is a rectangular area. Therefore, only the upper-left
and lower-right corner must be specified. Click the top left of the area and drag the mouse
pointer to the bottom right to define your rectangle.

Complex area: The image is divided into a matrix of small equally sized rectangles. Each
rectangle can be selected by a mouse click. An area is excluded (discarded) by clicking it with
the right mouse button and included (processed) by clicking the left mouse button. With a
pressed mouse button, drag over the image to include or exclude several areas at a time. If
you select Complex area, you may fill in the properties for:
o Grid: Set the wanted grid size (8 x 8, 16 x 16 or 32 x 32) for the rectangles.
o Show grid: Clear this to turn off the graphical representation of rectangles in the image.
If you have specified an area of recognition, the excluded area is shown as red shaded in the image of
the main window.