Japanese app Tuna Scope uses AI to grade the quality of fish

A Japanese chain of sushi restaurants is using an AI-powered app to assess the quality of tuna -- a key step in the preparation of sushi that traditionally requires years of training from experienced human buyers. But can it really replace a human's fish sense? The app, named Tuna Scope, was developed by Japanese advertising firm Dentsu Inc. It uses machine learning algorithms trained on thousands of images of the cross-sections of tuna tails, a cut of the meat that can reveal much about a fish's constitution. From a single picture, the app grades the tuna on a five-point scale based on visual characteristics like the sheen of the flesh and the layering of fat.