Legendárium Nagyappó: Augmented Reality-Based Audiobook Application

The article presents the structure and the functioning of the Nagyappo Android mobile application and its implementation background. The purpose of the project is to create an application that is able to automatically identify legends by image recognition from the Szekeiyföldi Legendárium book and “read” them. To make the audio playback even more interesting, Augmented Reality (AR) elements are integrated into the application. The legends are “read” by the well-known grandfather character from the Legendárium cartoon series. Grandpa (in Hungarian Nagyapo) walks in into the camera view and sitting down on the page of the book tells the story of the legend to which the phone's camera is directed. The application is mainly made for small children. Using the software, they can become acquainted with Transylvania's legends even before they can read. If someone does not have the Szekelyföldi Legendárium book, he/she can still listen to the available content: using the Search functionality, it is possible to search among the available audio books. The media materials (animations, audio books, images) which are used within the application are provided by the Szekelyföldi Legendárium team.