The invention relates to processing and generating image data and analysis and displaying a 3D image. A method of controlling a device for generating an augmented reality consists in receiving object-related data from sensors, recognizing the object and generating a virtual object, the authenticity of an activation code that identifies a set of pictures containing objects is pre-verified, data related to an object obtained in the form of photo or video frame(s), the object is identified on said frame(s) by comparison with images stored in the memory of the user device, and a virtual object is generated in the form of a 3D model, reproduced in real time, on a display of the user device, on top of the acquired frames. Wherein the object is a two-dimensional image of at least one item depicted on a picture contained in a set to which an activation code is assigned.