Now that we have an idea and understanding of just what a biometric authentication solution is and how it works, we will try to build a simple but actually working prototype using the same IBM Watson Visual Recognition service we used in Chapter 8, Creating a Facial Expression Platform on IBM Cloud, as well as that project as a guide for our new solution.
As a reminder, the IBM Watson Visual Recognition service understands the image content out-of-the-box (we demonstrated this in our Chapter 8, Creating a Facial Expression Platform on IBM Cloud project). The pretrained models provided enable you to analyze images for objects, faces, colors, food, explicit content, and other subjects for insights into your visual content. We successfully used the service to detect faces and then determine expressions.