ANPR LUMO | installation guide
7.2.3 ENGINE
The preset default values of the Lumo engine usually result in good reading results, but they can be modified to tune
the OCR to specific application demands. The Engine page allows you to adjust all parameters necessary to optimize
the reading of license plates with the ANPR Lumo engine.
Reading Mode
The ANPR Lumo engine can operate in several performance modes, which balance processing speed and reading
accuracy differently. The faster modes offer a higher reading speed on the camera at the cost of lower reading accuracy
and vice versa.
The ANPR Lumo camera offers the following reading modes:
Fastest: Fastest possible processing speed with lower recognition quality than in other modes. Recommended
for open traffic where recognition speed has absolute priority.
Fast: High processing speed with slightly better recognition quality than in the fastest mode.
Standard: A good compromise between speed and reading performance, recommended to be used in most
situations.
High: High mode is about half the speed compared to fast mode. The reading accuracy of the high mode is
very good at reasonable speed.
Best: The best possible reading quality. It can be up to three times slower than in the fast mode. At the same
time the reading confidence will be about 3-4% better than in Fast mode.
Min Letter height (px)
Defines the minimal height of characters, in pixels, that are to be recognized. The camera will only accept characters
equal or larger in height than this value.
Use this parameter if license plates above a minimum size should be read- e.g. by enforcing a value of 16 px, license
plates too far from the camera will be ignored because they are too small.
We recommend that this value should not be less than 12 pixels.
Max Letter height (px)
Defines the maximum height of characters, in pixels, that are to be recognized. The camera will only accept characters
equal or smaller in height than this value.
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