The Algorithm is explained in our github page: https://github.com/private-dreamnet/dreampower
The underlying technology is pix2pixHD: https://github.com/NVIDIA/pix2pixHD
To add in the ability to nudify images where the model is facing to the back, a lot of example images need to be gathered, and the masks need to be placed in the images.. this is a manual process until the algorithm has learned enough that you can use the results, improve on them, feed them back into the algorithm to improve it more.
In addition, the current algorithms masks do not include the butt/ass area of models so this needs to be added as well.
The good news is that all of this is being worked on as we speak 🙂