I would like to implement marker-less object detection on my project.
But, I can not find a way to implement marker-less object detection in my project.
Please anyone advice how to do it with ThingWorxStudio.
Just to understand it right: You want to use Spatial Tracking right?
There is an example project which descripe each step very good. Try it.
PTC has shown object recognition/detection in ThingWorx View (here) but it's not in Studio yet.
As Stefan mentioned, you can now use Spatial Tracking, but only with a supported Apple device.
If you go into you Studio page, it will be there in the latest version (8.0.4). It's called Studio Sample - Spatial Tracking and this is the thumbnail image: