Here is a picture that explains how to create your own report.
Everything Bodywhat does is data driven and resorts to a wide variety of tools ranging from Computer vision to Bayesian Statistics.
Think of Bodywhat as digital mirror that takes in your body and instantly compares it to every other. If you'd like to know precisely how each body metric is computed, check out the FAQ.
A core idea behind the project is the body-image normalization process. By making every body picture comparable to each other, we created a controlled environment where statistical analysis and advanced learning techniques could be applied.
Active appearance models, Neural networks and Cascading classifiers are some of the tools Bodywhat is built upon.