Using Ionic, is it possible for me to be able to capture an image and the trigger would be whenever the face smiles? I am looking for suggestions, any resource materials that I could get using Ionic.
You need to use some emotion detection api. This problem is not related to ionic itself but to computer vision. So what you likely do is send/upload your photo to online api (for example google cloud vision or any other) to detect emotions in your photo and it will detect emotions for for you. The result will be then utilized by your application.