Hi @tobias.fischer1
Firstly, the topic (Inferring resnet18 classification etlt model with python - #41 by Morganh ) is talking about classification model. So it is not related to TrafficCamnet.
Trafficamnet is based on TLT detectnet_v2.
So , its preprocessing is the same as detectnet_v2.
See reference Run PeopleNet with tensorrt - #6 by Morganh