Influence of pollution?

This cannot be answered in such a general way.

You can first exhaust the recognition with the check digit: The UIC numbers have a check digit; if all digits except one are recognized, then you can calculate the missing digit.

If the machine does not recognize the UIC, but the number can still be recognized with the human eye, then the number is maintained by us. The user also has the option of entering the UIC himself.

Of course, if the wagon is so dirty that you can't see anything with the human eye, then the machine can't.

On request, wagons with an unrecognised UIC number are automatically reported and presented.

In any case, the high-resolution image of the wagon is available.

Due to the small distance between the optical system and the rail vehicles, the quality of the image recognition is not impaired by heavy precipitation.