Fig. 4
From: Where you go is who you are: a study on machine learning based semantic privacy attacks
User profiling from location labelling. a The true location category is compared to the category with the highest predicted probability. The place labelling accuracy is computed as the ratio of categories where the prediction matches the ground truth. b The predicted labels for individual location visits can be aggregated per user to yield an estimated user profile; reflecting behaviour and interests. The visits are aggregated either by their frequency per category (orange) or by their average predicted probability (blue). The profiling error expresses the difference between the predicted profile and the true profile