Facial Expressions in Art, Science, & Technology by Face the Facts

Inner brow raiser is one of the most difficult facial actions to find clean references for. Many sources fail to find actors who can separate their inner brow raiser from other facial actions such as outer brow raiser (from frontalis, pars lateralis) and brow lowerer (from corrugator).

Many tech leads live under the assumption that – if they acquire enough data to train their model, problems with quality will simply work themselves out. Wow! Magic. This assumption often operates under an additional (but false) assumption: There is only a negligible percentage of impure data.