AR DeepCalorieCam V2: food calorie estimation with CNN and AR-based actual size estimation

In most of the cases, the estimated calories are just associated with the estimated food categories, or the relative size compared to the standard size of each food category which are usually provided by a user manually. In addition, in the case of calorie estimation based on the amount of meal, a user conventionally needs to register a size-known reference object in advance and to take a food photo with the registered reference object. In this demo, we propose a new approach for food calorie estimation with CNN and Augmented Reality (AR)-based actual size estimation. By using Apple ARKit framework, we can measure the actual size of the meal area by acquiring the coordinates on the real world as a three-dimensional vector, we implemented this demo app. As a result, it is possible to calculate the size more accurately than in the previous method by measuring the meal area directly, the calorie estimation accuracy has improved.