12 weeks post op FUE, what are you thoughts? (photos)

It can take 6 to 12 months after surgery to see results.  If you are concerned it is best to contact your doctor.

You can’t begin to evaluate hair loss until 4-6 months post op. The majority of change in new growth occurs from 5-12 months, although typically at 12 weeks you should be completely healed. If you have any questions regarding your healing you need to meet with your physician, and as far as growth, it is too early to tell. 

First I have to say that you will not get your aim about hair density because transplanted grafts number is very less for restoring that loss of hair. But do not forget that regrowing hair is thin, undersized and not bright untill 4-5 th months of hair transplant. İt's normal for new growing hair starting to get native characteristics, waviness, curl in first 4-5 months..This actually takes 10-13 months for hair to become full mature , as thick and bright  as native hair.