Fixing mesh inflating effect when using microdisplacement

When using microdisplacement, you might notice that the maps add volume to your original models. Here’s a way to fix that.
Senad Korjenic writes:
Hi guys, I made a short tutorial about fixing the inflating effect when using microdisplacement, I hope it’s useful to you.

This is great! Thank you, Senad!
That was very useful. Thank you!
It seems to me that it is much simpler to first subtract 0.5 from the texture and than do a multiplication. In this situation there is no need in calculation the half of the displacement strength.