If you are experiencing frequent missed license plates, consider lowering the recognition confidence setting by 0.1 or 0.05.
After adjusting the confidence level, monitor the system and review the results after 100-150 license plate events to gather sufficient data.
If necessary, you can continue to lower the confidence level based on the desired outcomes.

However, please note that decreasing this parameter may increase the likelihood of "false" recognitions, such as mistaking leaves, fences, or other objects for license plates.
It's important to monitor the system closely and find a balance between the recognition rate and the occurrence of false events.