What does dsexample and btrans stand for in the sample app gstdsexample.cpp?

I’m trying to crop objects from their bounding box using deepstream. However I stumbled upon this article which explains how to achieve it. There were certain things in the sample code provided which I couldn’t comprehend. Could anyone help me explain what they stand for.

The forum article that I found on how to achieve it,

Any help would be appreciated. Thanks.

Please follow README to build and enable dsexample plugin in running deepstream-app:


And then apply the patch to save detected objects to JPEG files.