Facial Landmark Annotation Tips

[lea fava]

I'm trying to use dlib's imglab tool to annotate my own facial landmark dataset to include points for the hairline, pupils, neck, and ears similar to the markup I've attached below. I'm a little apprehensive about getting started though because I'm unsure how precise the points have to be as some of the images from the databases I am working with don't have a single person looking directly into the camera. Do you have any tips for me? I feel like once I get started, things will quickly get out of hand without some guidance. Thanks!

[Davis]

Start by annotating 100 faces, or 200 maybe. Train a model using that data
and see what you get. Then use that model to label a bunch of other images
and go manually move the landmarks to the right places. Then retrain and
relabel. Repeat a few times as your grow your dataset.

[lea fava]

Thanks so much! I'll give it a shot and let you know what I get.