Apparatus and method for performing image-based food quantity estimation

A computer-implemented method for performing image-based food quantity estimation, the method comprising:

• acquiring, via a user interface, for each of a plurality of users, one or more physical attributes of a body part of a respective user;
• associating, for each of the plurality of users, the acquired one or more physical attributes of the body part with a user profile of the respective user in a user profile database;
• acquiring, via the user interface, a first image, wherein the first image depicts a food item and a body part of a first user;
• detecting, via a processor, based on the acquired first image, a first physical attribute of the body part of the first user;
• identifying the first user by comparing the detected first physical attribute of the body part of the first user with corresponding type of physical attribute of the body part of the plurality of users stored in the user profile database;
• retrieving, via the processor, a second physical attribute of the body part of the first user from the user profile of the first user;
• identifying, based on the acquired first image, the depicted food item;
• and
• estimating, via the processor, a quantity of the food item depicted in the acquired first image based on the identified food item, the detected first physical attribute of the body part of the first user, and the retrieved second physical attribute of the body part of the first user.