In this chapter, you learned how to use the Mobile Vision APIs, in this case, the Faces API. There are a few things to note here. This program is not optimized for production. Some things you can do on your own are load the image and do the processing in a background thread. You can also provide a functionality to allow the user to pick and choose images from different sources other than the static one used. You can get more creative with the filters and how they are applied too. Also, you can enable the tracking feature on the FaceDetector instance, and feed in a video to try out face tracking.