Deepstream run multiple model engines concurrently

What are these models? Detectors, classifier, segmentations, … What is the relationship between these models?

Take our deepstream-test2 as an example, C/C++ Sample Apps Source Details — DeepStream 6.1.1 Release documentation, the pipeline runs 4 models on one stream. One detector model to detect cars in the video, three classifier models to identify the manufacture, color and type of the cars.