This is exactly the kind of thing that Menpo makes easy: https://gist.github.com/jabooth/a52019f6e7c09f2a3e01 https://gist.github.com/jabooth/a52019f6e7c09f2a3e

This is exactly the kind of thing that Menpo makes easy: https://gist.github.com/jabooth/a52019f6e7c09f2a3e01 https://gist.github.com/jabooth/a52019f6e7c09f2a3e01 (Forgive the rushed nature of this, literally just whipped this up in the last 20 mins. Will provide a link to the menpofit model in a later revision)