The Concept of Demonstrating Non-Existent Architecture Using Light Projection

This article covers the subject of illusory exposure of non-existent architectural objects in their original location. The authors believe that this specific conservation method is a way to disseminate knowledge about the past architectural landscape and thus to increase the identity of cities and their inhabitants. The concept refers to augmented reality, but the authors use only analog optical means to visualize the virtual component. The visualization consists of projecting the object onto the walls of buildings and the ground. In order to preserve their intact condition, light projection is used. The image creates the illusion of three-dimensionality if it is perceived from the center of the projection. After a preliminary analysis of the available means of light expression, this article presents the results of this research. In the first stage, a simple geometric model was visualized using various techniques in order to evaluate them and select the optimal one. In the second stage, a virtual visualization of a specific architectural object was created. Its form and location were established based on the analysis of historical iconographic material and reports from archaeological works. The influence of local conditions on the practical possibilities of light projection was taken into account.