ANPR LUMO
| installation guide
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Start_Stop
ANPR detects plates when start input is received, and stops after receiving the stop input (used
when the start and stop trigger is depending on 2 different inputs)
Start_Time
ANPR detects plates when start trigger is received, and will stop after the Trigger timeout value
Start_Sequence
ANPR detects plates start when start trigger is received, and will stop when the amount of frames
set at the sequence length (frames) is reached.
Explanation MODE OF OPERATION Items:
STREAM MODE:*
Presets for different operation modes, Single, Parking, Offline, Freeflow*
MINIMUM DETECTIONS:*
Minimum Detections control how many readings of the same license plate will be
made until a definite result is produced. Only after this number of readings the
transmission of a result will take place.
MAXIMUM CHARACTERS MISMATCH:*
Maximum plate mismatch refers to the maximum amount of characters
allowed to be different between two plate strings for them to merge.
Recommended to be set to 1.
SEND UTF:
When enabled the output message will be send in UTF format
Notes STREAM MODE
Single
The camera reads every single image as quickly as possible. Each input image is considered on its
own and unrelated to images before and after it.
Parking
This mode is designed for access and parking control systems. Each vehicle number plate is required
to be detected at least three times. The output result is available immediately afterward.
Offline
In this mode, the results are available with a delay of about 25 frames. The reading quality is the best
in this mode as the engine has more frames to analyze before producing results. It is not suited for
real time application where any delay is unwanted.
Free flow
This mode is designed for freeflow real-time systems. It is configured in such a way that it tries to
catch all passing vehicles. The result may become available with a delay of up to 15 frames.
Explanation ENGINE Items:
READING MODE:*
Fastest, Fast, Standard, High, Best*
MIN LETTER HEIGHT (px):*
Set the minimal height of characters, in pixels. The ANPR will only accept characters
larger in size than set in this parameter. The value should not be less than 8 pixels.
Default 15
MAX LETTER HEIGHT (px):*
Set the maximal height of characters, in pixels, that ANPR will acknowledge.
All characters bigger than the given size will not be processed and will be dismissed
by the engine. Default 100
MAX PLATE ANGLE (deg):*
If vehicles can appear on images under a certain angle to the camera, ANPR can be
instructed to search for plates in a wider angle relative to x-Axis.
The angle can be set between 0 and 90°, but best results are recognized between
5° and 30°. Default 20
MIN PLATE CONFIDENCE (%):*
Minimum plate confidence refers to the minimum confidence level at which the
ANPR will recognize a license plate as valid. Range varies between 0 and 100
percent. If minimal plate confidence is set to 70% the program will produce only
results with the level of recognition certainty 70% or above. All lower readings will
be ignored. Default 50
LIMIT OF LOW CONF (%):*
This parameter is used to set a limit for which the reading confidence will be
considered low, but still valid. The lower confidence limit must be equal to/greater
