To get more training data, you could have filmed using a green screen. Insert whatever background you like (as long as the result looks natural). That way you

To get more training data, you could have filmed using a green screen. Insert whatever background you like (as long as the result looks natural). That way you can automatically get a good pixel map of the subject. And using a video camera at 30fps, you could get thousands of training images in just a few minutes. Of course, you might run into an issue of overfitting (it might learn what you as an individual looks like and not generalize to other people). However as long as you green-screen a somewhat large number of people this shouldn’t be an issue. Edit: darn. Looks like I wasn’t the only person to think of this idea!