Deepstream LPD detect twice for same vehicle

[jason.cham]

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) rtx3050
• DeepStream Version 6.4
• JetPack Version (valid for Jetson only)
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

Hi, I am using the deepstream LPR app. I noticed out of the odds of 30 vehicles, sometimes it might detect the license plates twice for the same vehicle (The location of the license plate is the same and it output the license plate twice). May i know why is this happening and how can i configure the config files that the LPD model can only detect one license plate for each vehicle

[junshengy]

From your description, I guess it is caused by the post-processing of SGIE(car license plate detection).

Try adjusting the pre-cluster-threshold

https://docs.nvidia.com/metropolis/deepstream/dev-guide/text/DS_plugin_gst-nvinfer.html#id3

It’s open source，refer this file ./opt/nvidia/deepstream/deepstream/sources/libs/nvdsinfer/nvdsinfer_context_impl_output_parsing.cpp

[yingliu]

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks